Thermally stimulated currents in poly(vinyl chloride): Tacticity and molecular weight influence |
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| Authors: | J. M. Barandiarán J. J. Del Val J. Colmenero C. Lacabanne D. Chatain J. Millán |
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| Affiliation: | 1. Departamento de Física Facultad de Ciencias Químicas Alza , San Sebastián, Spain;2. Laboratoire de Physique des Solides associé au CNRS Université , Paul Sabatier Cedex, 31062, France;3. Instituto de Plásticos y Caucho , CSIC Juan de la Cierva 3, Madrid, Spain |
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| Abstract: | Thermally stimulated currents (TSC) have been measured in several samples of poly(vinyl chloride) differing in tacticity and molecular weight as a result of polymerizing them at different temperatures. This has allowed us to characterize the relaxation behavior of PVC. No dielectric relaxation can be observed by this experimental technique at temperatures between liquid helium and liquid nitrogen. The β relaxation is observed around 173°K, with similar parameters in all samples studied. Around the glass transition the relaxation times isolated in the α peak follow a compensation law. Molecular weight and tacticity have a strong influence on the temperature of the maximum and the intensity of this relaxation, respectively. |
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| Keywords: | Deformation behavior Extruded-blown film High-density polyethylene Spherulite Tensile properties |
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