Organic hybrid of chlorinated polyethylene and hindered phenol. IV. Modification on dynamic mechanical properties by chlorinated paraffin

Abstract

Binary systems of chlorinated polyethylene (CPE) and chlorinated paraffin (CP) or 3,9-bis[1,1-dimethyl-2{β-(3-tert-butyl-4-hydroxy-5-methylphenyl) propionyloxy}ethyl]-2,4,8,10-tetraoxaspiro[5,5]-undecane (AO-80) and their ternary systems were investigated by dynamic mechanical analysis, thermal analysis, and infrared spectrum analysis. Adding CP into CPE/AO-80, in which one novel relaxation appears above the glass-transition temperature of CPE, can increase not only the peak height but also the minimum value between two peaks. The tan δ value in the middle of the two peaks for CPE/CP/CPE was found to be proportional to the slope (d ln E′/dT) of the E′ curve at an identical temperature. The addition of CP caused changes in many of the hydrogen bonds: a decrease in hydrogen bonds between the hydroxyl groups of AO-80, a reinforcement of hydrogen bonds between the hydroxyl groups of AO-80 and α-hydrogens of CPE, and the formation of other hydrogen bonds between the carbonyl groups of AO-80 and α-hydrogens of CPE. Those changes are useful to improve the temperature dependence of tan δ and to enhance the stability of the dynamic mechanical properties. © 2001 John Wiley & Sons, Inc. J Polym Sci B: Polym Phys 39: 23–31, 2001