重质碳酸钙聚合改性及其在聚氯乙烯中的应用研究  

Study on polymerization modification of ground calcium carbonate and its application in poly(vinyl chloride)

作　　者：蓝擎 侯欣怡 李一凡 潘凯 周佳菊 黄丹梦 黄灏彬 LAN Qing;HOU Xinyi;LI Yifan;PAN Kai;ZHOU Jiaju;HUANG Danmeng;HUANG Haobing(Institute of New Functional Materials of GIIT,Co,LTD,Nanning 530000,China)

机构地区：[1]广西产研院新型功能材料研究所有限公司,南宁530000

出　　处：《中国塑料》2024年第5期61-65,共5页China Plastics

基　　金：南宁市科技重大专项(20221021)南宁市新型功能材料技术创新中心能力建设。

摘　　要：以重质碳酸钙为主要原材料,通过水磨、聚合改性得到可用于聚氯乙烯(PVC)管件的改性重质碳酸钙。通过粒度仪、热重分析仪、红外光谱仪、摆锤式冲击试验机、万能拉伸试验机、色差仪和光泽仪分别对重质碳酸钙及重质碳酸钙制备的PVC产品进行了表征和分析。结果表明,需在碳酸钙浆液中进行原位聚合反应,聚醋酸乙烯酯才能对碳酸钙包覆改性;聚醋酸乙烯酯改性的碳酸钙相较于常规硬脂酸改性的碳酸钙,在PVC材料应用中表现出了更好的外观及力学性能,这归因于聚醋酸乙烯酯能更好地解决碳酸钙与PVC之间的相容性问题。Ground calcium carbonate was modified through water grinding and polymerization modification to fit the appli⁃cation in poly(vinyl chloride)(PVC)pipes,and its structure and performance were investigated by using particle size ana⁃lyzer,thermogravimetric analyzer,infrared spectrometer,pendulum impact testing machine,universal tensile testing ma⁃chine,colorimeter,and gloss meter.The results indicated that the surface coating modification of calcium carbonate with polyvinyl acetate could be performed through in situ polymerization in calcium carbonate slurry.Compared to convention⁃al stearic acid⁃modified calcium carbonate,polyvinyl acetate⁃modified calcium carbonate exhibited better appearance and mechanical properties in the PVC application.This is due to the fact that polyvinyl acetate can better enhance the compat⁃ibility between calcium carbonate and polyvinyl chloride.

关 键 词：重质碳酸钙 聚氯乙烯 聚合改性 聚醋酸乙烯酯 

分 类 号：TQ325.3[化学工程—合成树脂塑料工业]