Styrene grafted onto polypropylene and polytetrafluoroethylene films
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2008
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ENCONTRO ANUAL DA SOCIEDADE BRASILEIRA DE PESQUISA EM MATERIAIS, 7.
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Resumo
The objective of this work is to present results of radiation-induced grafting polymerization of
styrene onto polypropylene (PP) films with 0.04 mm thickness and polytetrafluoroethylene
(PTFE) films with 0.2 mm thickness. Both films were processed in the same method. The
films were placed in a glass tube in contact with styrene monomer/toluene (1:1, v/v) solution
and nitrogen was bubbled to guarantee inert atmosphere. The films were irradiated at 20, 40,
80 and 100 kGy doses at room temperature in cobalt–60 source. After irradiation process the
samples were kept in the solution and at room temperature to 7, 14, 21 and 28 days in order to
evaluate the grafting behavior. Another aspect studied was the effect of radiation dose on the
grafting yield. The samples were characterized by Thermogravimetry Analysis (TGA),
Differential Scanning Calorimetry (DSC) and Infrared Spectroscopy (FTIR). The degree of
grafting (DOG) was calculated gravimetrically. The DOG results revealed that after 21 days
at 100 kGy is achieved the higher grafting in the films (table 1). By TG is verified that PTFE
grafted exhibit two steps of degradation and the PP grafted only one step of degradation.
Como referenciar
FERREIRA, H.P.; SOUZA, C.P. de; ZEN, H.A.; GERALDES, A.N.; RIBEIRO, G.; PARRA, D.F.; LUGAO, A.B. Styrene grafted onto polypropylene and polytetrafluoroethylene films. In: ENCONTRO ANUAL DA SOCIEDADE BRASILEIRA DE PESQUISA EM MATERIAIS, 7., 28 de setembro - 2 de outubro, 2008, Guaruja, SP. Resumo... Disponível em: http://repositorio.ipen.br/handle/123456789/22923. Acesso em: 19 Feb 2025.
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