氯乙烯-丙烯酸乙酯共聚物／纳米CaCO_3复合母粒改性PVC力学性能的研究  

Study on Mechanical Properties of PVC Modified by the Masterbatch of (Binyl Chloride/Ethyl Acrylate) Copolymer/(Nanometer Calcium Carbonate)

作　　者：王士财[1] 李宝霞[1] 张晓东[1] 李志国[1] 

机构地区：[1]青岛大学化工学院,山东青岛266071

出　　处：《中国塑料》2006年第3期39-42,共4页China Plastics

摘　　要：通过对纳米碳酸钙(n-CaCO3)表面改性及其对聚氯乙烯(PVC)、氯乙烯-丙烯酸乙酯共聚物(VC／EA)、 n-CaCO3三元复合体系加工工艺的考察,研制了(VC／EA)／n-CaCO3复合母粒改性的PVC材料,并对其力学性能进行了研究。结果表明,利用将VC／EA共聚物与n-CaCO3先制成复合母粒,再与PVC进行共混的二次分散成型工艺,有利于n-CaCO3在基体中的分散;当复合母粒中VC／EA与n-CaCO3的比例为2:3时,材料的力学性能最佳,n-CaCO3 对材料具有补强作用,并且n-CaCO3和VC／EA能协同增韧PVC,使材料的冲击强度得到大幅度提高,当PVC和复合母粒比例为100:20(质量比)时,材料的冲击强度达到41．5 kJ／m2,是纯PVC(PVC的冲击强度为4．9 kJ／m2)的8．5 倍,拉伸强度仍高达50．8 MPa。Vinyl chloride/ethyl acrylate copolymer （VC/EA） was blended with surface modified nanometer calcium carbonate （n-CaCO3） to form a masterbatch which was subsequently introduced into poly（vinyl chloride） （PVC）. The n-CaCO3 was well dispersed in the resin matrix. When the weight ratio of VCZEA to n-CaCO3 in the masterbatch was 2：3, optimal mechanical properties were obtained. When the weight ratio of PVC to the masterbatch [ （VC/EA）/n-CaCO3 = 2 ： 3 ] was 100 ： 20, an impact strength of 41.5 kJ/m^2, which was 8.5 times that of neat PVC （4.9 kJ/m^2） ,and a tensile strength of 50.8 MPa were achieved.

关 键 词：聚氯乙烯 氯乙烯-丙烯酸乙酯共聚物 纳米碳酸钙 改性 

分 类 号：TQ325.3[化学工程—合成树脂塑料工业]