ポリふっ化ビニリデン樹脂の静水圧下における引張特性

概要

論文の詳細を見る
For polymers, in general, the effects of hydrostatic pressure on mechanical properties are considerably different from those for metals : the yield stress and elongation at fracture have been reported to change with hydrostatic pressure to various degrees, depending on temperature and strain rate. Results of tension tests on PVDF under pressures up to 392 MPa, at temperatures up to 90℃, and with strain rates up to 1 s^<-1> are reported in this paper. As pressure increased, the yield stress increased and the elongation decreased ; as temperature was raised the yield stress became lower and the elongation higher. The brittle-to-ductile transition was observed near 30 MPa. Empirical formulas for the stress-strain curves were obtained in the post yield region. The glass-transition temperature Tg of PVDF was found to be -35℃. When the pressure was raised from 300 to 400 MPa, Tg shifted to 35℃.
一般社団法人日本機械学会の論文
1988-02-25