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Physical aspects of the thermal and hydrolytic ageing of polyester, polysulphone and polycarbonate films

✍ Scribed by M. Edge; N.S. Allen; J.H. He; M. Derham; Y. Shinagawa

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
522 KB
Volume
44
Category
Article
ISSN
0141-3910

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The hydrolytic aging of an unstabilized industrial sample of polycarbonate was studied at 40, 70, 80, and 90Β°C, 100% RH. The water absorption characteristics show that, at equilibrium, the polymer absorbs about 0.04 mol water per ester group and that the equilibrium is reached after about 10-40 h ex