钛酸酯偶联剂改性超细重碳酸钙填充的ABS复合材料性能研究

摘要

采用钛酸酯偶联剂GR-201对超细重碳酸钙(GY-616)进行表面改性,改性后的碳酸钙与丙烯腈-丁二烯-苯乙烯共聚物(ABS)制备出ABS/CaCO3复合材料,研究了偶联剂添加量和改性时间对CaCO3吸油值和接触角的影响,测试了复合材料的力学性能和MFR(熔体流动速率),并用扫描电镜(SEM)观测了CaCO3粒子在ABS中的分散性.结果表明:经偶联剂处理后,CaCO3吸油值降低,接触角增加;ABS/CaCO3复合材料力学性能提高,加工流动性增加;CaCO3粒子在ABS中的分散性提高.偶联剂添加量为1.5％,改性时间30 min,改性效果最佳,复合材料力学性能最佳,加工流动性最好;CaCO3粒子在ABS中的分散性最好.%Ultrafine calcium carbonate (GY-616) was modified by titanate coupling agent (GR-201),and the modified calcium carbonate was used to prepared ABS/CaCO3 composite.The effect of adding amount of coupling agent and modification time on the oil absorption value and contact angle of mosified calcium carbonate were analyzed,and mechanical properties and MFR of composites were also tested.The dispensability of CaCO3 in the matrix was observed by SEM.It was found that a lower oil absorption value and higher contact angle of calcium carbonate was obtained after modification of coupling agent GR-201.The best mechanical properties and higher MFR is obtained when 1.5wt％ GR-201 is added to calcium carbonate and the modification time is 30 min.The best dispensability of CaCO3 in the matrix also observed by SEM with the same modification process.