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|Type:||Artigo de periódico|
|Title:||Mechanical Degradation Of Polypropylene: Effect Of Uv Irradiation|
De Paoli M.-A.
|Abstract:||In studies of polymer degradation, one relates physical and chemical property changes to ageing conditions under the effect, usually, of a single initiating process. In order to study the possible existence of associated effects in the combined photo and mechanical degradation of polypropylene, the behavior of oriented and non-oriented film samples irradiated under load have been investigated, as well as the effect of UV-irradiation on samples being mechanically tested. Results indicate the existence of photo-tribo-chemical effects which have been detected by stress relaxation and stress-strain measurements, and by carbonyl index determinations. © 1993.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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