1993 Volume 50 Issue 12 Pages 977-982
Vinyl chloride and some vinyl monomers were copolymerized to improve the mechanical properties of poly (vinyl chloride) (PVC). The copolymers with relatively low molecular weight were prepared by suspension polymerization in the presence of dodecylmercaptan as a chain transfer agent. Discoloration time and mechanical properties of the blend consisting of PVC copolymers with low polymerization degrees and PVC with a high polymerization degree were investigated. Discoloration time of the PVC blend was affected by the polarity of vinyl monomers. Impact strength of the PVC blend was improved. In particular, when alkyl methacrylate was copolymerized, the impact strength was much improved. Tensile properties of the PVC blend were affected by the content of the vinyl monomer unit in the PVC copolymer.
