反应挤出PU/纳米CaCO_3增强增韧PVC  

PVC Toughened with PU/Nano-CaCO_3 by Reaction Extrusion Technology

作　　者：王士财[1] 张晓东[1] 李志国[1] 

机构地区：[1]青岛大学化学化工与环境学院,山东青岛266071

出　　处：《塑料》2009年第4期16-18,共3页Plastics

摘　　要：在考察聚氯乙烯/聚氨酯/纳米碳酸钙(PVC/PU/nano-CaCO3)反应挤出工艺的基础上,结合PU的反应特点,将表面处理的nano-CaCO3利用超声辐照技术并经搅拌分散于L-MDI中,采用反应挤出一步法制备了PU/nano-CaCO3共同增强增韧的PVC复合材料,并对其力学性能进行了研究。结果表明:PU/nano-CaCO3的质量配比为4∶1时,增韧效果最佳,PU和nano-CaCO3能协同增韧PVC,且nano-CaCO3具有增强作用,当PVC/PU/nano-CaCO3质量比为100∶20∶5时,材料的综合性能最优,冲击强度达到58.3 kJ/m2,拉伸强度为51.5 MPa,增强增韧PVC效果显著。The PVC composite material toughened with polyurethane （PU）/nanometer calcium carbonate （nano-CaCO3 ） was prepared by one-step reactive extrusion technology（RET） based on technological procedure of RET PVC/PU/nano-CaCO3 blending. The properties of PVC/PU/nano-CaCO3 were studied. The optimum toughening effectiveness was acquired when the mass ratio of PU to nano-CaCO3 equaled to 4： 1. There existed a synergism in toughening between nano-CaCO3 and PU, and besides,the former played a function of reinforcer. When the mass ratio of PVC to PU to nano-CaCO3 was 100： 20：5 ,the PVC composite material was endowed with the impact strength of 58.3 kJ/m^2 and tensile strength of 51.5 MPa.

关 键 词：聚氯乙烯 聚氨酯 纳米碳酸钙 反应挤出 增韧改性 

分 类 号：TQ325.3[化学工程—合成树脂塑料工业] TB383[一般工业技术—材料科学与工程]