不同协助技术固相接枝改性聚丙烯的研究  

Study on different technical assistance grafting modification of polypropylene in solid phase

作　　者：王鉴[1] 李青[1] 孟庆明[1] 李志源 

机构地区：[1]东北石油大学化学化工学院,黑龙江大庆163318 [2]喀喇沁旗环境监测站,内蒙古赤峰024400

出　　处：《化学工程师》2014年第8期71-74,共4页Chemical Engineer

摘　　要：分别采用有机分散剂、溶液浸渍和超临界二氧化碳(SC CO2)协助技术对聚丙烯(PP)进行固相接枝改性。通过自由基聚合制备了PP与马来酸酐(MAH)、丙烯酸(AA)的接枝共聚物(PP-g-MAH/AA),考察了单体投料量、反应时间、反应温度对接枝反应的影响,用傅里叶变换红外光谱(FTIR)对PP-g-MAH/AA进行了表征,并测试了接枝产物的水接触角、热稳定性、熔体流动速率和力学性能。实验结果表明,当单体投料量为6%,100℃下反应2h时,三种协助方法的接枝效率均达到最大值,SC CO2协助技术对PP接枝改性的接枝率和接枝效率较最高,可达5.33%和88.83%。测试结果表明,SC CO2协助技术制得PP接枝产物热稳定性最好、水接触角最小。The solid-phase grafting of polypropylene which the was investigated by adopting solution dipping method、the presence of organic dispersant and supercritical carbon dioxide（SC CO2） solid-phase assist technolo-gy respectively. The graft copolymer of PP and MAH or AA （PP-g-MAH/AA） was prepared by free radical poly-merization. Influences of inventory rating of monomer,reaction temperature,and reaction time were investigated.The PP-g-MAH/AA was characterized by FTIR. The water contact angle,Thermal stability, melt flow rate and me-chanical property of the copolymer were tested. The laboratorial results show that both of the graft copolymer for the three means have the best grafting efficiency when we prepare it under 100℃for 2 hours with the 6%invento-ry rating of monomer, and supercritical carbon dioxide （CO2） SC solid-phase assist technology has the best graft-ing ratio and grafting efficiency：5.33%and 88.83%. The tests result indicate that the graft copolymer of PP which was prepared by supercritical carbon dioxide（CO2） SC solid-phase assist technology has excellent thermal stability and minimal water contact angle.

关 键 词：聚丙烯 固相法 接枝 改性 

分 类 号：TQ334.2[化学工程—橡胶工业]