制备氯引发PE接枝苯乙烯/顺丁烯二酸酐  

Density Polyethylene(HDPE) by In-Situ Chlorinating Graft Copolymerization

作　　者：赵志强[1] 王双双[1] 王娜[1] 闫志佩[1] 赵季若[1] 冯莺[1] 

机构地区：[1]青岛科技大学橡塑材料与工程教育部重点实验室/山东橡塑材料与工程重点实验室,山东青岛266042

出　　处：《塑料》2011年第6期23-27,共5页Plastics

摘　　要：为提高氯化原位接枝过程中聚乙烯(PE)接枝顺丁烯二酸酐(MAH)的接枝率,加入了第二单体苯乙烯(St)。以FTIR,1H-NMR、GPC及凝胶含量研究PE氯化原位接枝MAH/St接枝共聚物(PE-cg-(MAH/St)的结构。实验结果表明:第二单体St的加入可以明显提高MAH的接枝率,同时没有交联结构的产生。研究了反应温度、单体配比、单体总质量分数、氯气流速等对接枝产物PE-cg-(MAH/St)接枝率的影响,并对接枝物的热性能进行了探索。当反应温度控制在80～90℃,MAH/St单体比例为9∶7,单体总量16份,氯气流速29 mmol/min,MAH的接枝率可达3.56%。Attempts to enhance the grafting degree （GD） of maleric anhydride （MAH） onto high density polyethylene （HDPE） in the presence of styrene （St） by in-situ chlorinating graft eopolymerization （ISCGC） were made. The product composed of MAH/St eopolymer as grafted chains and polyethylene as backbone （only containing trace chlorine） was named as PE-cg-（MAH/St）. The feasibility of preparing PE-cg-（MAH/St） was identified by both FTIR and 1H-NMR spectrum. The structure of the graft copolymer was characterized by FTIR,1H-NMR, DSC and GPC. The gel content （GC） close to zero showed that there was no cross-link reaction in MAH/St grafted onto PE by ISCGC. The effects of reaction temperature, mass ratio,total monomer concentration,chlorine flow rate on the GD of MAH were also investigated, and the experimental results showed that the addition of the second monomer St could significantly increased the GD of MAH. In the case of setting the reaction temperature was 80 - 90 ℃, the mass ratio of MAH and St was about 9： 7, the total monomer was 16 parts per hundreds of resin,and chlorine flow 29 mmol/min,GD was up to 3.56 %.

关 键 词：聚乙烯 顺丁烯二酸酐 苯乙烯 氯化原位接枝聚合 结构表征 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]