HDPE氯化原位接枝MAH及产物结构  

In-situ Chlorinating and MAH Grafting on Molecular Chains of High Density Polyethylene

作　　者：林意生[1] 李莉莉[1] 赵季若[1] 殷敬华[1] 

机构地区：[1]中国科学院长春应用化学研究所高分子物理与化学国家重点实验室

出　　处：《应用化学》2005年第12期1282-1286,共5页Chinese Journal of Applied Chemistry

基　　金：国家自然科学基金重大项目(50390090);面上项目(50373042)资助

摘　　要：研究了以氯气作为引发剂对高密度聚乙烯(HDPE)官能化,接枝顺丁烯二酸酐(MAH)的新方法。用FTIR、1H NMR对分离纯化后的接枝产物进行了表征,表明产物中生成了聚乙烯接枝MAH的共聚物(CPE-g-MAH),证明了氯化原位接枝MAH的可行性。采用1H NMR研究了CPE-g-MAH接枝产物的链节结构单元。采用化学滴定和FTIR方法测定了接枝共聚物中MAH的接枝率(GD%)。与传统的官能化方法相比,接枝产物中MAH的接枝率有很大的提高(2.6%),氯化原位接枝过程中没有凝胶生成。MAH grafted polyethylene was prepared by means of in-situ reaction of HDPE in solid state with chlorine and MAH simultaneously. FTIR and 1H NMR were used to verify the formation of the target eopolymer and to characterize its chemical structure. A quantitative method was developed to measure the grafting degree of MAH by virtue of chemical titration and FTIR. The prepared copolymer had a higher grafting degree（up to 2. 6% by mass） compared to the MAH grafted PE by conventional methods, and was not erosslinked as proved via the determination of the gel percentage of the grafted samples.

关 键 词：高密度聚乙烯 氯化原位接枝 CPE-g-MAH 接枝率 凝胶 

分 类 号：O631[理学—高分子化学]