NMR研究不同牌号PE-RT和PE100管材的结构  

Applications of NMR in research of microstructure of PE pipe materials

作　　者：高凌雁[1] 王群涛[1] 郭锐[1] 王日辉[1] 许平[1] 石晶[1] 侯斌[1] Gao Lingyan;Wang Quntao;Guo Rui;Wang Rihui;Xu Ping;Shi Jing;Hou Bin(Research Institute of Qilu Branch Co., SINOPEC, Zibo 255400, China)

机构地区：[1]中国石油化工股份有限公司齐鲁分公司研究院,山东省淄博市255400

出　　处：《合成树脂及塑料》2017年第5期70-73,86,共5页China Synthetic Resin and Plastics

摘　　要：利用核磁共振波谱仪测试了5种管材专用聚乙烯(记作PE1~PE5),对共聚单体类型、共聚单体和支化点含量进行了分析。结果表明:PE1,PE2,PE3,PE5为乙烯-1-己烯共聚物;PE4为乙烯-1-丁烯共聚物;PE1和PE2的分子链较长且共聚单体和支化点含量较低,有利于形成较厚片晶;PE4和PE5的分子链较短且链结构中有双键结尾的现象;PE3和PE5的主链端甲基含量相同,但PE3中平均每个分子链上的碳数远大于PE5。Five polyethylene(PE)pipe materials(PE1-PE5)were tested by nuclear magnetic resonance(NMR).The type and the content of the comonomer and branch points in these materials were analyzed.The results show that PE1,PE2,PE3and PE5are ethylene-1-hexene copolymers.PE4is ethylene-1-butene copolymer.PE1and PE2have long molecular chains and low content of comonomer and branch point,which is favorable to form thick lamellar crystal.The molecular chains of PE4and PE5are short and there exist the double bond at the end of the chain.PE3and PE5contain the same amount of terminal methyl groups in main chains,while the average number of carbon atoms in each molecular chain of PE3is much larger than that of PE5.

关 键 词：聚乙烯 核磁共振 共聚单体 端甲基 

分 类 号：O657.2[理学—分析化学] TQ325.12[理学—化学]