Thermomechanical characteristics of rigid poly(vinyl chloride) crosslinked by a peroxide in the presence of trimethylolpropane trimethacrylate

Abstract

This paper presents some thermomechanical characteristics of crosslinked poly(vinyl chloride) (PVC) samples such as glass transition temperature (T_g), softening point (T_s), and linear thermal expansion coefficient (α). Probe load of 0.05 N is most suitable to evaluate expansion, softening and contraction of the crosslinked PVC samples. T_g, T_s and α of the crosslinked PVC samples are higher than those of the uncrosslinked samples. The highest T_g is observed in the PVC sample containing 0.4 phr of 1,1-di-(t-amylperoxy) cyclohexane (DAPC) and 10 phr of trimethylolpropane trimethacrylate (TMPTMA). Among the crosslinked PVC samples, the sample with 0.2 phr of DAPC and 15 phr of TMPTMA has the least T_s. The highest α appears in the PVC sample containing 0.4 phr of DAPC and 5 phr of TMPTMA. Journal of Chemistry, Vol. 42 (1), P. 110 - 114, 2004