プラスチックフィルムの環境劣化に関する分光学的研究

概要

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Environmental degradation due to temperature and humidity has been studied by infrared (IR) spectroscopy on polyethylene (PE), cellulose-acetate (CA) and polycarbonate (PC) films. Specimens were exposed in a vessel at a constant temperature and humidity for 12〜40 days, and tensile tests of the specimens were carried out at room temperature. The weight, the water absorption and the IR-absorption spectra of the specimens were also measured before the exposure and after. Due to the effects of environment, the change of the weight and water absorption occurred for CA, but not for PE and PC. For CA the weight decreased for all exposure conditions while the water absroption increased with humidity. The variation of fracture strain and yield stress was observed for CA, but not for PE and PC. Similarly, only for CA the rate of IR absorption at 745 and 1288 cm^<-1> decreased with humidity. Linear relationships were found between mechanical properties and the rate of IR absorption.
一般社団法人日本機械学会の論文
1991-09-25