文献类型：期刊文献

中文题名：十二内酰胺两段式水解聚合合成PA12的研究

英文题名：Synthesis of PA 12 from laurolactam by two-stage hydrolytic polymerization process

作者：文超[1];朱志华[1];刘柏平[1]

机构：[1]华东理工大学化学工程联合国家重点实验室,上海200237

年份：2015

卷号：38

期号：5

起止页码：26

中文期刊名：合成纤维工业

外文期刊名：China Synthetic Fiber Industry

收录：CSTPCD

语种：中文

中文关键词：聚十二内酰胺;十二内酰胺;水解聚合;相对分子质量调节剂;催化剂

外文关键词：polylaurylamide;;laurolactam;;hydrolytic polymerization;;relative molecular mass regulator;;catalyst

摘要：以十二内酰胺为单体,采用两段式水解聚合工艺合成聚十二内酰胺(PA 12),考察了两段聚合工艺条件以及不同种类的催化剂和相对分子质量调节剂对PA 12的重均相对分子质量(Mw)及其结构与性能的影响。结果表明:较佳的水解聚合工艺条件是以200 g十二内酰胺单体为基准,水的加入量为40 g,己二酸的加入量为0.8 g,高压段反应温度为280℃,高压段反应时间为3 h,常压段反应温度为260℃,常压段反应时间为1.5 h,得到的PA 12的Mw为4.4×104,与工业化PA 12相当;当己二酸或醋酸的加入量相同时,得到的PA 12的Mw相当,结晶温度、熔点和相对结晶度几乎相同,但己二酸催化得到的PA 12的热稳定性稍优,作为催化剂和相对分子质量调节剂,己二酸略优于醋酸。
Polylaurylamide( PA 12) was synthesized by using laurolactam as the monomer by two-stage hydrolytic polymerization process. The effects of the two-stage polymerization conditions and the varieties of catalysts and relative molecular mass regulators on the weight average molecular mass( Mw),structure and properties of PA 12 were investigated. The results showed that the Mwof the obtained PA 12 reached 4. 4 × 104,equal to that of industrial PA 12,under the rational hydrolytic polymerization conditions as followed: 40 g water and 0. 8 g adipic acid added into 200 g laurolactam,reaction temperature and time 280 ℃ and3 h at high pressure stage and 260 ℃ and 1. 5 h at atmospheric pressure stage,respectively; the obtained PA 12 exhibited the equal Mwand almost the same crystallization temperature,melting point and crystallinity as adipic acid or acetic acid was added in the same dosage; and adipic acid as the catalyst contributed better thermal stability to PA 12,which was better than acetic acid as a catalyst and relative molecular mass regulator.