PVC/ACR共混物结构与性能的研究  

The Structure and Properties Research of PVC/ACR Blend

作　　者：李爽[1] 任亮[1] 李新[1] 陈学进[1] 张明耀[1] 

机构地区：[1]长春工业大学化学工程学院,吉林长春130012

出　　处：《塑料工业》2017年第8期31-34,50,共5页China Plastics Industry

摘　　要：采用乳液聚合技术合成一系列具有核-壳结构的丙烯酸酯类抗冲改性剂(ACR),将其与聚氯乙烯(PVC)进行熔融共混制备PVC/ACR共混物。研究ACR的核/壳比、橡胶的粒子尺寸和交联剂三烯丙基异三聚氰酸酯(TAIC)含量对PVC/ACR共混物力学性能与形态结构的影响。结果表明,随着核/壳比的增大,ACR的增韧效率有了明显的提高;交联剂的加入改变了ACR的刚性与韧性,进而对共混物的性能有了较大的影响,随着交联剂含量的增加,共混物的冲击强度先变大后减小,当交联剂的含量为4%,ACR的添加量为8 phr时,共混物的冲击强度达到了1 196.70 J/m;随着橡胶粒子尺寸的增加,共混物的韧性逐渐降低。扫描电子显微镜分析表明,ACR增韧PVC的主要增韧机理是橡胶的空洞化和基体的剪切屈服。A series of acrylate resin （ACR） with core-shell structure as impact modifier were synthesized by emulsion polymerization. Then polyvinyl chloride （PVC）/ACR blend was prepared by melt blending. The effect of the core-shell ratio of ACR, rubber particle size and the content of cross-linking agent on the properties and morphological structure of the PVC/ACR blend was studied. The results show that, with the increase of the core-shell ratio of ACR, the toughening efficiency obviously increase ; the addition of cross-linking agent changes the rigidity and toughness of ACR, thus affecting the properties of the blend greatly. With the increase of cross-linking agent content, the impact strength of blend increases firstly and then decreases. When the content of cross-linking agent is 4%, the amount of ACR is 8 phr, the impact strength of the blend reaches 1 196.70 J/m; With the increase of rubber particle size, the toughness of the blend is reduced gradually. Scanning electron microscope test results show that： the main toughening mechanism of ACR toughened PVC is the cavitation of rubber and the shearing yield of matrix.

关 键 词：丙烯酸酯 聚氯乙烯 力学性能 形态结构 

分 类 号：O631.11[理学—高分子化学]