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Peroxide crosslinking of rigid poly(vinyl chloride)
Authors:N L Thomas  X Zheng
Affiliation:Institute of Polymer Technology & Materials Engineering, Loughborough University, Loughborough, Leicestershire, LE11 3TU, United Kingdom
Abstract:The optimum conditions for crosslinking rigid poly(vinyl chloride) with trimethylolpropane trimethacrylate (TMPTMA) and peroxide have been examined. The extent of crosslinking was measured by determining gel content by Soxhlet extraction in tetrahydrofuran. Mechanical properties were measured at 130°C and dynamic viscoelastic measurements were carried out to detect changes in the glass transition temperature (Tg). It was found that 15 phr of TMPTMA and 0.3 phr of peroxide were optimum concentrations for maximizing the extent of crosslinking, tensile strength, and Tg. The lower molding temperature of 170°C was preferred to minimize thermal degradation. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 103: 2904–2909, 2007
Keywords:poly(vinyl chloride)  peroxide  crosslinking  mechanical properties  trimethylolpropane trimethacrylate
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