Relaxation changes in polyacrylonitrile yarn during the heat-stretching process
Tóm tắt
The stress in polyacrylonitrile yarns of various chemical structures and of various linear densities has been studied under isometric heat-treatment under static and dynamic conditions. Limits of the relaxation states have been determined over a wide range of temperature and rate (or duration) of yarn heating, in the contact and convective methods of heating.
Tài liệu tham khảo
B. A. Fomenko, E. A. Pakshver, et al., Khim. Volokna, No. 4, 24–26 (1989).
N. I. Neimark, L. P. Perepechkin, and B. A. Fomenko, in: Cellulose Esters [in Russian], VNIISS, Vladimir, p. 332–335 (1969).