Abstract: | The authors have investigated changes in the lifetimes of polymethylmethacrylate, polyethylene, and polystyrene resulting from prestressing. They show that, according to the temperature, stressing can cause either an increase or a decrease in the lifetime.A. F. Ioffe Physicotechnical Institute, Academy of Sciences of the USSR, Leningrad. Translated from Mekhanika Polimerov, No. 1, pp. 176–178, January–February, 1972. |