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制备了氯化聚氯乙烯/聚甲基丙烯酸甲酯(CPVC/PMMA)共混材料,研究了PMMA的引入对CPVC/PMMA共混体系的力学性能、耐热性能、表面光泽度、加工流动性和微观结构的影响。结果表明:适量PMMA的引人,使CPVC/PMMA共混体系的缺口冲击强度和光泽度较纯CPVC显著提高,耐热性能亦有所改善,而拉伸强度下降不明显;塑炼过程中,CPVC/PMMA共混体系熔体的平衡扭矩降低,凝胶化时间减少。当PMMA含量为15 phr时,CPVC/PMMA共混体系具有最佳综合性能,此时该共混体系的缺口冲击强度为5.4 kJ/m2,拉伸强度为53.5 MPa,表面光泽度为82.3%,热变形温度为102.4℃,平衡扭矩为20.1 N·m。
The CPVC / PMMA blends were prepared. The effects of PMMA on the mechanical properties, heat resistance, surface gloss, processing fluidity and mechanical properties of CPVC / PMMA blends were studied. And microstructure effects. The results showed that: the introduction of the appropriate amount of PMMA, CPVC / PMMA notched impact strength and gloss than the pure CPVC significantly improved heat resistance also improved, while the tensile strength decreased not obvious; plasticizing process, The balance torque of CPVC / PMMA blends decreases and the gelation time decreases. When the content of PMMA is 15 phr, the CPVC / PMMA blends have the best comprehensive properties. The notched impact strength of this blend is 5.4 kJ / m2, the tensile strength is 53.5 MPa, the surface gloss is 82.3% The heat distortion temperature is 102.4 ℃ and the balance torque is 20.1 N · m.