INSTITUTO DE PESQUISAS ENERGÉTICAS E NUCLEARES Repositório Digital da Produção Técnico Científica Biblioteca Terezine Arantes Ferraz

 

Publicações do autor   ESPERIDIANA AUGUSTA BARRETOS DE MOURA    depositadas no Repositório Digital/IPEN - Total : 160 28/11/2024 04:39:30
Seq	Ano	Ipen_doc	Tipo	Circ.	Título
1	2023	29697	Artigo de periódico	Internacional	Influence of reinforcing efficiency of clay on the mechanical properties of poly(butylene terephthalate) nanocomposite
2	2023	29881	Artigo de periódico	Internacional	Effectiveness of modified lignin on poly(butylene adipateco-terephthalate)/poly(lactic acid) mulch film performance
3	2022	28665	Artigo de periódico	Internacional	Development of sustainable food packaging material based on biodegradable polymer reinforced with cellulose nanocrystals
4	2022	28883	Artigo de periódico	Internacional	Recycling expanded polystyrene with a biodegradable solvent to manufacture 3D printed prototypes and finishing materials for construction
5	2022	29053	Artigo de periódico	Internacional	A residue-free and effective corncob extrusion pretreatment for the enhancement of high solids loading enzymatic hydrolysis to produce sugars
6	2022	29057	Artigo de periódico	Internacional	Enhanced miscibility of PBAT/PLA/lignin upon γ-irradiation and effects on the non-isothermal crystallization
7	2022	29101	Artigo de periódico	Internacional	Synergistic effect of e-beam irradiation and graphene oxide incorporation on thermal, mechanical, and barrier properties of poly (ethylene-co-vinyl alcohol) film
8	2021	27392	Artigo de periódico	Internacional	Mechanical and thermal properties of modified Georgian and Brazilian clay infused biobased epoxy nanocomposites
9	2021	27545	Artigo de periódico	Internacional	Lignin‑based polyethylene films with enhanced thermal, opacity and biodegradability properties for agricultural mulch applications
10	2020	25762	Artigo de periódico	Internacional	Investigation of the effect of titanium dioxide and clay grafted with glycidyl methacrylate by gamma radiation on the properties of EVA flexible films
11	2020	27185	Livro	Nacional	IPEN e a nanotecnologia
12	2020	27595	Artigo de periódico	Internacional	Noncovalently functionalized halloysite nanotubes for use in reinforced polymer composites
13	2020	27621	Capítulo de livro	Internacional	A bibliometric analysis of the strategy and performance measurement of the polymer matrix nanomaterials development scenario globally, and the participation of Brazil
14	2020	27622	Capítulo de livro	Internacional	A comparison between graphene oxide and reduced graphene oxide as reinforcement agents in polypropylene nanocomposite using irradiated polypropylene as compatibilizer
15	2020	27625	Capítulo de livro	Internacional	Improvement properties of polypropylene by graphene oxide incorporation
16	2020	27626	Capítulo de livro	Internacional	Influence of the reduced graphene oxide incorporation on properties of acrylonitrile butadiene styrene (ABS)
17	2020	27627	Capítulo de livro	Internacional	Inhibition of flame propagation in nanocomposites with expanded polystyrene recycled clay, gypsum, and titanium dioxide
18	2020	27628	Capítulo de livro	Internacional	Investigation on mechanical and thermal behaviours of PBAT/PLA blend reinforced with reduced graphene oxide nanosheets
19	2020	27629	Capítulo de livro	Internacional	Mechanical and morphological properties of hybrid composites based on recycled LDPE/EVA blend reinforced with clay and babassu fiber residues
20	2020	27631	Capítulo de livro	Internacional	Production and characterization of PBAT reinforced with clay and graphene oxide nanosheets
21	2020	27641	Resumo de eventos científicos	Internacional	Sonochemical synthesis of reduced graphene oxide
22	2020	27657	Resumo de eventos científicos	Internacional	Graphene oxide nanosheets as fillers for thermoplastic-matrix nanocomposites
23	2020	27666	Resumo de eventos científicos	Internacional	Effect on flame propagation in recycled expanded polystyrene with flame retardant/white clay/titanium dioxide nanocomposite
24	2020	27667	Resumo de eventos científicos	Internacional	UV Barrier influence according to the amount of TiO2 in PBAT biodegradable flexible film
25	2020	27668	Resumo de eventos científicos	Internacional	Synergistic effect of polylactic acid(PLA)/poly(butylene adipate-co-terephthalate) (PBAT) blend and cellulose nanowhiskers for sustainable packaging applications
26	2019	25621	Capítulo de livro	Internacional	Microplastics
27	2019	25622	Capítulo de livro	Internacional	An investigation of mechanical and thermal properties of polypropylene reinforced with different clays
28	2019	25624	Capítulo de livro	Internacional	Comparative study of the use of rice husk ashes and graphite as fillers in polypropylene matrix composites
29	2019	25625	Capítulo de livro	Internacional	Development of biocomposite materials from biodegradable polymer and bio-hydroxyapatite derived from eggshells for biomedical applications
30	2019	25629	Capítulo de livro	Internacional	Investigation on mechanical behaviors of polyamide 11 reinforced with halloysite nanotubes
31	2019	25630	Capítulo de livro	Internacional	Production and characterization of a hybrid composite of polypropylene reinforced with piassava (Attalea funifera Martius) fiber and light green clay
32	2019	25631	Capítulo de livro	Internacional	Recycled gypsum particles incorporation in recycled expanded polystyrene by biodegradable solvent
33	2019	25876	Capítulo de livro	Internacional	The potential of micro- and nano-sized fillers extracted from agroindustry residues as reinforcements of thermoplastic-based biocomposites
34	2019	26714	Livro	Nacional	O IPEN e a saúde
35	2018	24661	Capítulo de livro	Internacional	The influence of clay reinforcement on the properties of recycled polymer foams
36	2018	24662	Capítulo de livro	Internacional	Characterization of non-covalently functionalized halloysite
37	2018	24663	Capítulo de livro	Internacional	Development and characterization of recycled-HDPE/EVA foam reinforced with babassu coconut epicarp fiber residues
38	2018	24664	Capítulo de livro	Internacional	Influence of electron-beam irradiation on the properties of LDPE/EDPM blend foams
39	2018	25101	Resumo de eventos científicos	Internacional	Synthesis and characterization of nanocrystalline hydroxyapatite derived from eggshell for biomedical applications
40	2018	25303	Texto completo de evento	Nacional	Caracterização de nanotubos de haloisita funcionalizados covalentemente para aplicação em compósitos de matriz polimérica
41	2018	25393	Resumo de eventos científicos	Nacional	Preparação e caracterização de nanocompositos EVA/ARGILA/TiO2 para a aplicação no segmento de embalagens para alimentos
42	2018	25474	Texto completo de evento	Internacional	Environmental problems in the production of gypsum encourage its recycling and reuse for the production of new composites
43	2017	23926	Artigo de periódico	Internacional	Evaluation of the Poly (Lactic Acid) and calcium carbonate effects on the mechanical and morphological properties in PBAT blends and composites
44	2017	24824	Resumo de eventos científicos	Internacional	Recycling of plastic cups and packaging of EPS to obtain nanocomposite with nanoclay and plaster
45	2017	24834	Resumo de eventos científicos	Internacional	Structure and thermal/mechanical properties of poly (ϵ‐caprolactone)‐clay blend
46	2017	24842	Resumo de eventos científicos	Internacional	Biodegradable polymer blends reinforced with bio-hydroxyapatite nanoparticle - preparation and characterization
47	2017	24845	Resumo de eventos científicos	Internacional	Effects on Clay addition on properties of LDPE flexible films
48	2017	24848	Resumo de eventos científicos	Internacional	Preparation and characterization of nanocellulose from sugarcane bagasse
49	2017	24855	Resumo de eventos científicos	Internacional	Corncob pretreated with the combination of electron beam irradiation and enzymes to enhance fermentable sugars for biofuel production
50	2017	24872	Texto completo de evento	Nacional	Processamento e caracterização de EVA com adição de celulose
51	2017	24940	Texto completo de evento	Nacional	Propriedades térmicas e mecânicas de filmes flexíveis de polietileno e copolímero de etileno e álcool vinílico reforçados com óxido de grafeno
52	2017	25004	Capítulo de livro	Internacional	Mechanical, thermal, morphology and barrier properties of flexible film based on polyethylene-ethylene vinyl alcohol blend reinforced with graphene oxide
53	2017	25009	Capítulo de livro	Internacional	Polymer blend based on recycled polyethylene and ethylene vinyl acetate copolymers reinforced with natural fibers from agricultural wastes
54	2017	25010	Capítulo de livro	Internacional	Preparation and characterization of clay exfoliation and vegetal fibre on properties of recycled low density polyethylene
55	2017	25020	Capítulo de livro	Internacional	Study of flexible films prepared from PLA/PBAT blend and PLA E-beam irradiated as compatibilizing agent
56	2017	26962	Resumo de eventos científicos	Internacional	Residues from agroindustry as reinforcement in foams based on PBAT/PLA blend
57	2017	26963	Resumo de eventos científicos	Internacional	Sugar produced from corncob pretreated with the combination of electron beam irradiation and enzymes
58	2016	21801	Capítulo de livro	Internacional	Characterization of Brazil nut fibers
59	2016	22437	Artigo de periódico	Internacional	Electron-beam irradiation effect on thermal and mechanical properties of nylon-6 nanocomposite fiber infused with diamond and diamond coated carbon nanotubes
60	2016	22470	Texto completo de evento	Internacional	Development of bio-based foams prepared from PBAT/PLA reinforced with biio-calcium carbonate compatibilized by electron beam radiation
61	2016	22626	Texto completo de evento	Internacional	Morphology, optical transparency and oxygen barrier of EVOH/graphene oxide films
62	2016	22627	Texto completo de evento	Internacional	Preparation of EVOH/graphene oxide by blown film extrusion – correlation between film properties and graphene oxide addition
63	2016	22629	Texto completo de evento	Internacional	Study of flexible films prepared from PBAT/PLA blends reinforced with bio-CaCO3
64	2016	23378	Resumo de eventos científicos	Internacional	Organic bentonites-HIPS nanocomposites. Influence of EB radiation on the mechanical properties
65	2016	23396	Resumo de eventos científicos	Internacional	Graphene oxide preparation with different sonication times
66	2016	23508	Artigo de periódico	Internacional	Re-emerging field of lignocellulosic fiber – polymer composites and ionizing radiation technology in their formulation
67	2016	23582	Resumo de eventos científicos	Internacional	Preparation and characterization of EVA/CLAY/TiO2 flexible film modified by electron beam radiation
68	2016	23583	Resumo de eventos científicos	Internacional	Ecologic particleboard based on HDPE/EVA blend reinforced with corncob fiber and zinc oxide nanopaticle treated by electron-beam radiation
69	2016	23584	Resumo de eventos científicos	Internacional	Mechanical, thermal and barrier properties of EVOH/GRAPHENE oxide flexible films treated by electron beam radiation
70	2016	23649	Texto completo de evento	Internacional	Comparative study of the effects of cellulose nanowhiskers and microcrystalline cellulose addition as reinforcement in flexible films based on biopolymer blends
71	2016	23651	Texto completo de evento	Internacional	Effects of graphene oxide addition on mechanical and thermal properties of evoh films
72	2016	23652	Texto completo de evento	Internacional	Effects of carbon black incorporation on morphological, mechanical and thermal properties of biodegradable films
73	2016	23745	Resumo de eventos científicos	Internacional	Effects of bio-CaCO3 nanoparticles and graphene nanosheets on properties of PBAT/PLA flexible films treated by ionizing radiation
74	2015	20809	Texto completo de evento	Internacional	Mechanical morphological and thermal properties of açai fibers reinforced biodegradable polymer composites
75	2015	20810	Texto completo de evento	Internacional	Biodegradable starch/copolyesters film reinforced with silica nanoparticles
76	2015	20811	Texto completo de evento	Internacional	influence of clay exfoliation on the properties of evoh/clay flexible fims
77	2015	20812	Texto completo de evento	Internacional	Influence of the nanoclay cloisite 20A incorporation on properties of acrylonitrile butadiene styrene (ABS)
78	2015	20813	Texto completo de evento	Internacional	Investigation on mechanical and thermal behaviours of copolyester/pla blend reinforced with TiOsub(2) nanoparticle
79	2015	21173	Texto completo de evento	Nacional	Preparação e caracterização de compósitos baseados na blenda de PBAT/AMIDO, micro e nanocargas de BIO-CaCOsub(3)
80	2015	21175	Texto completo de evento	Nacional	Efeitos da adição de silictos lamelares nas propriedades mecânicas de filmes flexíveis de copolímero de etileno de alcool vinílico
81	2015	21179	Texto completo de evento	Nacional	Processamento e caracterização de polietileno reforçado com resíduos de fibras vegetais e bentonita brasileira
82	2015	21183	Texto completo de evento	Nacional	Estudo das propriedades para aplicação do nanocompósito obtido em matriz de polietireno de copos descartáveis com bentonita e hemi-idratado de sulfato de calcio
83	2015	26927	Artigo de periódico	Internacional	Efecto morfológico y térmico de filmes flexibles de etilen vinil alcohol reforzados con óxido de grafeno
84	2014	20107	Artigo de periódico	Internacional	Preparation and characterization of electron-beam treated HDPE composites reinforced with rice husk ash and Brazilian clay
85	2014	20108	Artigo de periódico	Internacional	Short vegetal-fiber reinforced HDPE - A study of electron-beam radiation treatment effects on mechanical and morphological properties
86	2014	20350	Resumo de eventos científicos	Nacional	Nanocompósitos argila organofilica/poliestireno de alto impacto obtidos a partir de uma bentonita cubana
87	2014	20488	Resumo de eventos científicos	Nacional	Caracterização de bentonita do estado da Paraíba visando seu uso em fármacos e cosméticos
88	2014	20601	Texto completo de evento	Internacional	Effects of the incorporation of clay on properties of the biodegradable copolyester/PLA flexible film
89	2014	20804	Texto completo de evento	Internacional	PBT/Brazilian clay nanocomposites prepared by melt intercalation: effects of organophilic clay content and ionizing radiation treatment
90	2014	20805	Texto completo de evento	Internacional	Polypropylene nanocomposites reinforced with organophilic clay and brazilian nut fibers
91	2014	20806	Texto completo de evento	Internacional	Preparation and characterization of polypropylene nanocomposites with organoclay and discarded bond
92	2014	20807	Texto completo de evento	Internacional	Comparison between bio-composite based green HDPE/Brasil nut shell fiber (BNSF) treated and non treated by electron-beam radiation
93	2014	20808	Texto completo de evento	Internacional	Investigation on mechanical and morphological behaviours of copolyesters/starch blend reinforced with rice husk ash
94	2013	18299	Artigo de periódico	Internacional	Ionizing radiation influence on the morphological and thermal characteristics of a biocomposite prepared with gelatin and Brazil nut wastes as fiber source
95	2013	19365	Texto completo de evento	Internacional	Influence of electrom beam irradiation on PP/Piassava fiber composite prepared by melt extrusion process
96	2013	19381	Texto completo de evento	Internacional	Sugarcane bagasse ash reinforced HDPE composites: effects of electron-beam radiation crosslinking on tensile and porphological properties
97	2013	19383	Texto completo de evento	Internacional	Biodegradable aliphatic aromatic copolyester/corn starch blend composite reinforced with cofee parchment hush
98	2013	19497	Texto completo de evento	Internacional	Effects of electron-beam irradiation on HDPE/Brazil nut shell fiber composite
99	2013	19722	Resumo de eventos científicos	Nacional	Preparação e caracterização do bio-compósito preparado a partir do polietileno de alta densidade verde e fibra da casca da castanha do Brasil
100	2013	21889	Iniciação Científica	Nacional	Estudo do efeito da radiação por feixe de elétrons nas propriedades do copósito HDPE/Cinzas do Bagaço de Cana de Açucar
101	2013	21915	Iniciação Científica	Nacional	Estudos dos efeitos da radiação nas propriedades de compósitos HDPE/fibras da casca da castanha do Brasil
102	2013	21921	Iniciação Científica	Nacional	Polipropileno reforçado com argila bentonita e fibras de piaçava - processamento e caracterização
103	2013	21949	Iniciação Científica	Nacional	Estudo comparativo do efeito do tratamento por feixe de elétrons em polímeros biodegradável reforçados com fibra vegetal
104	2013	23873	Texto completo de evento	Internacional	Effect of electron-beam irradiation on Nylon-6/diamond coated CNTS composite fiber
105	2013	23881	Texto completo de evento	Internacional	Comparison between HDPE/clay and HDPE/piassava fiber/clay treated by electron beam radiation
106	2012	18382	Texto completo de evento	Nacional	Inchamento de argilas organofilicas em solventes orgânicos
107	2012	21840	Iniciação Científica	Nacional	Estudos dos efeitos da radiação nas propriedades de compósitos HDPE/fibras da casca da castanha do Brasil
108	2012	23860	Texto completo de evento	Internacional	Thermal and morphological behavior of EVOH/piassava fiber composites
109	2012	23861	Texto completo de evento	Internacional	Comparative study of the sugarcane bagasse FIBER/HDPE composite properties using electron-beam and gamma radiation treatments
110	2012	23863	Texto completo de evento	Internacional	Preparation and characterization of PBT/clay nanocomposite
111	2011	16823	Texto completo de evento	Internacional	Caracterization of HDPE/Brazil nut shell fiber composite treated by electron-beam radiation
112	2011	16824	Texto completo de evento	Internacional	Comparative study on the mechanical behavior of electron-beam and gama irradiated bagasse fiber/HDPE composite
113	2011	16825	Texto completo de evento	Internacional	Effects of electron-beam radiation on thermo-mechanical properties of HDPE/Brasil nut shell fiber/clay nanocomposite
114	2011	16848	Texto completo de evento	Internacional	Studies on the effects of electron-beam radiation dose on properties of HDPE/piassava/clay/PP nanocomposite
115	2011	16849	Texto completo de evento	Internacional	Studies of thermo-mechanical properties of PBT/clay nanocomposite treated by electron-beam radiation
116	2011	17147	Texto completo de evento	Internacional	Crystallinity changes of electron-beam irradiated ethylene-vinyl alcohol copolymer (EVOH) as a function of radiation dose
117	2011	17323	Texto completo de evento	Nacional	Comportamento térmico e cristalino do compósito de evoh com fibra de piaçava
118	2011	17479	Texto completo de evento	Internacional	Thermo-mechanical behaviour of HDPE/sugarcane bagasse fiber/organoclay nanocomposites
119	2011	17480	Texto completo de evento	Internacional	Effects of piassava fiber incorporation on the morphological thermal and behaviour of HDPE composite
120	2011	17481	Texto completo de evento	Internacional	Characterization of Brazil nut shell fiber
121	2011	17482	Texto completo de evento	Internacional	Comparison between irradiated HDPE/piassava fiber/nanpclay and HDPE/piassava fiber/nanoclay/PP blend
122	2011	17483	Texto completo de evento	Internacional	Thermal and morphological behaviour of EVOH/piassava fiber composites treated by electron-beam irradiation
123	2010	14850	Artigo de periódico	Internacional	Effect of electron beam radiation dose on the foam formation in pre-ceramic polymer
124	2010	15774	Artigo de periódico	Internacional	Gelatin/piassava composites treated by electron beam radiation
125	2010	15775	Artigo de periódico	Internacional	Effect of electron beam irradiation on mechanical properties of gelatin/brazul nut shell fiber composites
126	2009	14225	Texto completo de evento	Nacional	Estudo dos efeitos da radiacao por feixe de eletrons nas propriedades mecanicas da estrutura BOPP/LDPE
127	2009	14282	Iniciação Científica	Nacional	Emprego da radiacao ionizante por feixe de eletrons na resistencia a perfuracao por Lasioderma srricorne em embalagens para armazenamento de granola
128	2009	14934	Artigo de periódico	Internacional	The influence of electron-beam irradiation on some mechanical properties of commercial multilayer flexible packaging materials
129	2009	15135	Texto completo de evento	Internacional	Effects of electron beam radiation on mechanical properties and on the resistence to punctures caused by Plodia Interpunctella in cereal bar packaging
130	2009	15208	Texto completo de evento	Internacional	The influence of electron-beam irradiation on some mechanical properties of commercial multilayer flexible packaging materials (PET MET/LDPE)
131	2009	15216	Texto completo de evento	Internacional	Electron beam effects on gelatin polymer
132	2009	15255	Texto completo de evento	Internacional	Evaluation of the effects of electron-beam irradiation on the punture resistance by Lasioderma serricorne in flexible packaging of granola
133	2009	15256	Texto completo de evento	Internacional	Efeito da radiacao por feixe de eletrons sobre as propriedades mecanicas do polietileno de alta densidade
134	2009	15257	Texto completo de evento	Internacional	Estudo dos efeitos da dose de radiacao por feixe de eletrons nas propriedades mecanicas do filme flexivel multicamadas PET/PP
135	2009	15258	Texto completo de evento	Internacional	Avaliacao dos efeitos da radiacao por feixes de eletrons nas propriedades mecanicas do polipropileno
136	2009	17423	Resumo de eventos científicos	Internacional	Changes in physicochemical, morphological and thermal properties of electron-beam irradiated ethylene-vinyl alcohol copolymer (EVOH) as a function of radiation
137	2008	13069	Artigo de periódico	Internacional	SiOC ceramic foams synthesized from electron beam irradiated methylsilicone resin
138	2008	14265	Artigo de periódico	Internacional	Mechanical and thermal properties of commercial multilayer flexible plastics packaging materials irradiation with electron beam
139	2008	16287	Resumo de eventos científicos	Internacional	Effects of electron-beam irradiation on mechanical and barrier properties of commercial high oxygen barrier coextruted flexible food packaging material
140	2008	16297	Resumo de eventos científicos	Internacional	Effect of ionizing radiation in pebd monolayer fims
141	2008	16300	Resumo de eventos científicos	Internacional	Effects of electron beam radiation doses on the foam formation in pre-ceramic polymer
142	2008	16301	Resumo de eventos científicos	Internacional	Electron beam irradiation effects on the resistance of packaging materials in the perforation by Lasioderma serricorne
143	2008	22266	Iniciação Científica	Nacional	Emprego da radiação ionizante por feixe de elétrons na resistência de materiais de embalagem à perfuração pelo besouro Lasioderma Serricorne
144	2006	11356	Tese	Nacional	Avaliação do desempenho de embalagens para alimentos quando submetidas a tratamento por radiação ionizante
145	2005	10620	Texto completo de evento	Internacional	Estudo comparativo do efeito da radiacao ionizante sobre as propriedades opticas do filme flexivel de poliamida 6, 6.6
146	2005	10774	Texto completo de evento	Internacional	Evaluation of mechanical properties and DSC study of commercial multilayer PA/PE film treated with e-beam radiation
147	2004	10004	Artigo de periódico	Internacional	Effects of gamma radiation on commercial food packaging films-study of changes in UV/VIS spectra
148	2003	09528	Texto completo de evento	Nacional	Espumas ceramicas obtidas a partir da pirolise de polissiloxano e carga ativa de Al e Si
149	2003	09961	Texto completo de evento	Nacional	Estudo por FTIR de filme de polietileno de baixa densidade submetido a radiação gama na presença de oxigênio
150	2002	08881	Resumo de eventos científicos	Nacional	Aplicacao de radiacao ionizante em misturas de polissiloxano-carga ativa para obtencao de compositos ceramicos
151	2002	10085	Texto completo de evento	Nacional	Obtenção de espumas cerâmicas no sistema Si-Al-O-C-N a partir de polissiloxano irradiado com feixe de elétrons
152	2002	11333	Texto completo de evento	Nacional	Efeito da radiacao gama sobre as propriedade mecanicas de materiais de embalagens plasticas flexiveis
153	1999	06502	Dissertação	Nacional	Inibicao das reacoes de polimerizacao e de desproporcionamento, exotermicas e explosivas, do monomero tetrafluoroetileno
154	1999	07714	Texto completo de evento	Nacional	Sintese do perfluoropolieter
155	1998	06160	Artigo de periódico	Internacional	Use of ionizing radiation for the study of the stabilization of tetrafluoroethylene
156	1997	04913	Texto completo de evento	Nacional	Estudo da estabilizacao do tetrafluoroetileno e da temperatura de irradiacao na seguranca do processo de polimerizacao do monomero induzida por radiacao gama
157	1997	06235	Texto completo de evento	Internacional	Use of ionizing radiation for the study of the stabilization of tetrafluoroethylene
158	1994	05619	Texto completo de evento	Internacional	Inhibition of the tetrafluoroethylene polymerization reaction
159	1988	03723	Texto completo de evento	Nacional	Perfluoropolyether production
160	1988	03724	Texto completo de evento	Nacional	Production of the perfluoropolyether. 1. Optimization of the chlorodifluoromethane pyrolysis reactor for the synthesis of the tetrafluoroethylene