Improvement in physical properties of poly(vinyl chloride) by radiation-induced graft copolymerization with mixed monomers |
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Authors: | Hideki Omichi Kenzo Yoshida Kazuya Suzuki Kunio Araki |
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Abstract: | Gamma-ray-induced graft copolymerization of butadiene with vinyl monomers onto PVC was attempted to improve the physical properties of PVC. The Izod impact strength was increased from 2 kg·cm/cm2 to more than 100 kg·cm/cm2 by grafting ca. 10% butadiene. But the tensile strength and melt flow were decreased by the grafting. The electron micrograph showed that the mass of polybutadiene in the graft copolymer had a convenient diameter (0.1–1 μ) for absorbing the impact energy. The weatherability of PVC grafted with butadiene was improved by cografting of butadiene with acrylates and methacrylates which had long side chains. |
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