Abstract
Blends of poly(vinyl chloride) (PVC) and poly(ethylene-co-methyl methacrylate) (PEMMA) were prepared by solution blending in tetrahydrofuran (THF) and studied by Thermally Stimulated Current (TSC) measurements together with relaxation map analysis (RMA). Each of the TSC global spectra of these blends exhibited three peaks where the intermediate was found generated by space charge. The high temperature peak near 70°C was attributed to the glass transition (Tg) of PVC-rich phase and the low temperature peak in the range of −70 to −40°C was related to the Tg of PEMMA-rich phase. The significant shift of the low temperature peak from Tg(=−36°C) of PEMMA was attributed to the interaction of β-transition of PVC with α-transition of PEMMA. Maximum interaction was also found at an PEMMA content of 20 wt%. Arrhenius lines in the RMA of the low temperature peak were found to intersect at a single compensation point. From which the critical temperature (Tc), the relaxation time (τc) and the degree-of-disorder of the polymer blends were obtained.
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Chen, SI., Yang, CC. Thermally Stimulated Current Study of Poly(vinyl chloride)/Poly(ethylene-co-methyl methacrylate) Blends. Polym J 25, 1015–1022 (1993). https://doi.org/10.1295/polymj.25.1015
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DOI: https://doi.org/10.1295/polymj.25.1015
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