Mechanical degradation of polypropylene: Effect of UV irradiation

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...

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Bibliographic Details
Published in:Polymer degradation and stability 1993, Vol.40 (1), p.59-64
Main Authors: Baumhardt-Neto, Ricardo, De Paoli, Marco-A.
Format: Article
Language:English
Subjects:
Applied sciences
Chemical reactions and properties
Degradation
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
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Summary: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.
ISSN:0141-3910
1873-2321
DOI:10.1016/0141-3910(93)90191-K