一种新型纳米粒子胶乳增韧PVC共聚树脂的合成与性能评价

Synthesis and properties of a new type of PVC copolymer resin toughened by nanoparticle latex

介绍了一种新型纳米粒子胶乳增韧PVC共聚树脂(NCR)。先通过乳液聚合的方法,以丙烯酸酯类单体为主要原料制得粒径为120~140 nm的轻度交联复合胶乳,再利用氯乙烯单体对聚丙烯酸酯的溶胀特性,使上述胶乳与氯乙烯单体发生悬浮接枝聚合,形成具有互穿包覆结构的聚丙烯酸酯类弹性体纳米粒子增韧PVC共聚树脂。通过与PVC-SG5共混CPE/ACR/MBS的改性材料进行对比,发现NCR具有优异的常/低温缺口冲击性能,而且其综合力学性能优越,具有刚韧平衡的优势。此外,该共聚树脂易塑化,加工性能优异。

A new type of PVC copolymer resin （NCR） toughened by nanoparticle latex was intro- duced. A lightly crosslinked compounded latex with particle size of 120 -140 nm was prepared by the method of emulsion polymerization with acrylate as the main raw material. By using the swelling ofpoly- acrylate in vinyl chloride, the above latex was graft copolymerized with vinyl chloride to form a PVC co- polymer resin which had interpenetrating coating structure and was toughened by nanometer-sized polyac- rylate elastomer. The copolymer resin was compared with PVC -SG5 blended and modified by CPE/ ACR/MBS, showing that NCR had excellent constant temperature and low temperature notch impact resistance, superior comprehensive mechanical properties, and advantages of rigid -toughness equilibri- um. In addition, the copolymer resin was easy to be plasticized and had excellent processability.