An Experimental Study of Mechanical and Dielectric Losses in Certain High Polymers

摘要

Second-order transitions in pure polyvinyl acetate, cellulose acetate pure and plasticized, cellulose nitrate pure, plasticized, plasticized and stabilized, and plasticized and cross-linked were studied using both mechanical and dielectric loss measurements. In the study of mechanical losses, the main effort was directed towards low frequencies, and equipment was designed which permitted measurements down to about 10﹣4cps. Temperatures as low as -200°C were used in some cases.