PGN相对分子质量及其分布测定  

Determination of molecular weight and its distribution of PGN

作　　者：谭利敏[1] 王敏[1] 章园园[1] 徐娜[1] 刘孟丽 TAN Li-min , WANG Min , ZHANG Yuan-yuan , XU Na , LIU Meng-li(1.The 42nd Institute of the Fourth Academy of CASC, Xiangyang, Hubei 441003, China; 2. Liming ChemicalResearch and Design Institute Co., Ltd., Luoyang, Henan 471000, China)

机构地区：[1]中国航天科技集团公司四院四十二所,湖北襄阳441003 [2]黎明化工研究设计院有限责任公司,河南洛阳471000

出　　处：《粘接》2018年第7期30-33,共4页Adhesion

摘　　要：采用GPC-MALLS法测定了聚缩水甘油醚硝酸酯(PGN)6个窄分布标样的相对分子质量(M_r)及其分布。实验结果表明,PGN标样色谱峰峰形对称,峰窄,M_r分布均匀,分散指数D<1.12。与VPO法测定结果对照,数均分子质量(M_n)相对偏差小于6%。以窄分布PGN作标样,采用GPC法测定了PGN的M_r及其分布,获得的M_n、重均分子质量(M_w)以及分散指数与GPC-MALLS法结果基本一致,相对偏差小于4%;M_n与VPO法相对偏差小于6%。The molecular weight（M_r） and molecular weight distribution of six PGN standard samples were determinated by the gel permeation chromatography-laser light scatting（GPC-MALLS） method. The results showed that the peak shapes of self-made PGN standard samples were symmetrical and narrow, their molecular weight distributions were even, and their dispersion indexes D were less than 1.12. Compared with the results determinated by vapor pressure osmometry（VPO）, the relative error of number molecular weight（M_n） was less than 6%. Using the narrow distribution PGN as the standard samples of GPC, the M_r and its distribution of PGN were determined by the GPC method, and the M_n, weight average molecular weught（M_w） and D values were obtained. The results by GPC method were basically the same with the results by GPC-MALLS method and the relative error was less than 4%. Compared with the results by VPO method, the relative error was less than 6%.

关 键 词：聚缩水甘油醚硝酸酯(PGN) 相对分子质量 凝胶渗透色谱-激光光散射联用(GPC-MALLS) 凝胶渗透色谱(GPC) 蒸汽压渗透仪(VPO) 

分 类 号：TQ317[化学工程—高聚物工业]