单体中仲胺类化合物含量对长碳链尼龙1012性能的影响  

Effect of secondary amine compound content in monomers on properties of long carbon chain nylon 1012

作　　者：沈超 李应成 崔晶 林程 SHEN Chao;LI Yingcheng;CUI Jing;LIN Cheng(SINOPEC Shanghai Research Institute of Petrochemical Technology Co.,Ltd.,Shanghai 201208)

机构地区：[1]中石化(上海)石油化工研究院有限公司,上海201208

出　　处：《合成纤维工业》2024年第1期28-32,共5页China Synthetic Fiber Industry

摘　　要：以癸二胺和十二碳二元酸为原料制备尼龙1012盐,然后将双六甲基三胺作为含仲胺结构的化合物引入到尼龙1012盐聚合反应中制备尼龙1012,考察双六甲基三胺含量对尼龙1012性能的影响。结果表明:随着双六甲基三胺含量的增加,尼龙1012的相对分子质量逐渐增大,相对分子质量分布明显变宽,双六甲基三胺质量分数从0增加至2.0%,聚合物分散性指数从2.48上升到4.29;当双六甲基三胺质量分数大于1.0%时,尼龙1012的动态流变性能表现出弹性大于黏性的行为;随着双六甲基三胺含量的增加,尼龙1012的熔融温度和结晶温度均呈现逐渐降低趋势,而热分解温度逐渐上升;双六甲基三胺质量分数从0增加至1.0%,尼龙1012的拉伸强度逐渐降低,缺口冲击强度逐渐增大;双六甲基三胺的仲胺结构参与了聚合反应,形成了支化、交联结构,交联结构的增加有利于提高尼龙1012的拉伸强度。Nylon 1012 salt was prepared by using decanediamine and dodecanedioic acid as raw materials and then was introduced with bis(hexamethylene)triamine as a compound containing secondary amine structure to prepare nylon 1012 by polymerization reaction.The effect of bis(hexamethylene)triamine content on the properties of nylon 1012 was investigated.The results showed that the relative molecular mass of nylon 1012 gradually increased and the relative molecular mass distribution significantly became broad when the content of bis(hexamethylene)triamine was increased,and the polymer dispersibility index increased from 2.48 to 4.29 when the mass fraction of bis(hexamethylene)triamine increased from 0 to 2.0%;nylon 1012 exhibited an elasticity higher than viscosity in dynamic rheological behavior when the mass fraction of bis(hexamethylene)triamine was higher than 1.0%;the melting and crystallization temperatures of nylon 1012 gradually decreased and the thermal decomposition temperature gradually increased when the content of bis(hexamethylene)triamine was increased;the tensile strength of nylon 1012 gradually decreased and the notch impact strength gradually increased when the mass fraction of bis(hexamethylene)triamine increased from 0 to 1.0%;and the secondary amine structure of bis(hexamethylene)triamine participated in the polymerization reaction,forming branched and cross-linked structures,and the increase of cross-linked structure was beneficial for improving the tensile strength of nylon 1012.

关 键 词：尼龙1012 双六甲基三胺 动态流变性能 熔融结晶性能 热稳定性 力学性能 

分 类 号：TQ323.6[化学工程—合成树脂塑料工业]