水悬浮体系中三单体接枝聚丙烯的改性  

Modification of Ternary-Monomer Grafting onto Polypropylene in Water Suspension System

作　　者：祝宝东[1] 王鉴[1] 董群[1] 宋军[1] 

机构地区：[1]东北石油大学化学化工学院石油与天然气化工省重点实验室,黑龙江大庆163318

出　　处：《高分子材料科学与工程》2012年第1期67-70,共4页Polymer Materials Science & Engineering

基　　金：黑龙江省科技攻关项目(GZ06A402)

摘　　要：在水悬浮体系中,经自由基引发聚丙烯(PP)与马来酸酐(MAH)、苯乙烯(ST)及丙烯酸丁酯(BA)接枝聚合制备接枝产物(PP-g-PMSB),同时体系中产生了非接枝的聚合物(PMSB′)。结果表明,随单体含量增加,接枝率和PMSB′含量升高,且在接枝率高于5.25%时出现微量凝胶。三单体以长支链形式接枝到PP主链上,随接枝率的增加,PP-g-PMSB热稳定性和极性提高,熔体流动速率减小。接枝率5.50%时,PP-g-PMSB水接触角为79.52°;PMSB′含量3.25%时,水接触角降低至69.62°。Polypropylene（PP） was grafted with methyl methacrylate（MAH）,styrene（ST） and butyl acrylate（BA） via the free radical polymerization leading to PP-g-PMSB and non-graft polymer（PMSB′） in water suspension system.The results indicate that the graft ratio of PP-g-PMSB and content of PMSB′ increases as the monomer content increases,and when the graft ratio of the product PP-g-PMSB is above 5.25%,the traces of gel are seen generated.All these ternary-monomers are grafted onto PP as longer chain branches.The thermal stability and polarity of PP-g-PMSB increase along with the increase of graft ratio,but the melt flow rate decreases.The water contact angle of the PP-g-PMSB is 79.52° when graft ratio is 5.50%,decreases to 69.62° with 3.25% PMSB′.

关 键 词：聚丙烯 水悬浮体系 三单体 接枝产物 热稳定性 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]