硅烷偶联剂改性纳米碳酸钙在PVC复合材料的应用研究  

Research on the application of silane coupling agent modified nano calcium carbonate in PVC composite materials

作　　者：邓传福 颜干才 杜年军 Deng Chuanfu;Yan Gancai;Du Nianjun(Qinzhou Construction Engineering Quality Testing Center,Qinzhou 535000,Guangxi,China;GuangXi Ultra-fine New Material Technology Co.LTD.,Pingguo 533822,Guangxi,China)

机构地区：[1]钦州市建筑工程质量检测中心有限公司,广西钦州535000 [2]广西平果市润丰钙新材料科技有限公司,广西平果533822

出　　处：《橡塑技术与装备》2023年第11期13-17,共5页China Rubber/Plastics Technology and Equipment

摘　　要：采用γ-氨丙基三乙氧基硅烷(KH-550)对纳米碳酸钙进行特殊表面改性,利用扫描电镜(SEM)、红外光谱(IR)、热机械分析仪(TMA)、热重分析仪(TG)、转矩流变仪等测试手段,探究了改性后的纳米碳酸钙对聚氯乙烯(PVC)复合材料综合性能的影响。结果表明,通过在纳米碳酸钙湿法改性阶段引入过量的羟基,有助于提升硅烷偶联剂的接枝包覆效果,可以获得分散性和加工性较好的纳米填料,能够有效改善PVC复合材料的热稳定性能,促进塑化,实现复合材料的增强增韧效果。The special surface modification of precipitated calcium carbonate was carried out using silane coupling agent(KH-550),and the effects of different precipitated calcium carbonate on the comprehensive properties of polyvinyl chloride(PVC)composite materials were investigated by scanning electron microscopy(SEM),infrared spectroscopy(IR),thermomechanical analyzer(TMA),thermogravimetric analyzer(TG),torque rheometer and other testing methods.The results indicate that introducing excessive hydroxyl groups during the wet modification stage of nano calcium carbonate can improve the grafting and coating effect of silane coupling agent,obtain nano fillers with good dispersibility and processability,effectively improve the thermal stability and mechanical properties of PVC composites.

关 键 词：硅烷偶联剂 纳米碳酸钙 聚氯乙烯 改性 

分 类 号：TQ330.387[化学工程—橡胶工业]