新型长碳链聚酰胺1211的非等温结晶动力学  

Nonisothermal crystallization kinetics of novel long-carbon chain polyamide 1211

作　　者：陈广建 唐开亮 马士洲 张丽丽[1] 冯新星 CHEN Guangjian;TANG Kailiang;MA Shizhou;ZHANG Lili;FENG Xinxing(College of Chemical Engineering,Beijing University of Chemical Technology,Beijing100029,China;Institute of Chemical Defense of Military Academy of Military Science,Beijing102205,China;Quartermaster Engineering and Technology Institute of Systems Engineering Institute of Military Academy of Military Science,Beijing100010,China)

机构地区：[1]北京化工大学化学工程学院,北京100029 [2]军事科学研究院防化研究院,北京102205 [3]军事科学研究院军需工程技术研究所,北京100010

出　　处：《纺织学报》2018年第12期1-6,共6页Journal of Textile Research

基　　金：国家重点研发计划项目(2017YFB0309003-2)

摘　　要：针对聚合物力学性能受微观晶型结构影响的问题,采用一步聚合法制备了聚酰胺1211,通过调节聚酰胺1211的微观晶型结构来调控其力学性能。借助差示扫描量热仪对聚酰胺1211进行非等温结晶研究,表征其在非等温情况下晶型变化方式,分别用Jeziorny法和莫志深法修正的Avrami方程分析聚酰胺1211的非等温结晶行为。结果表明:通过Jeziorny法修正后的Avrami方程处理时,其非等温结晶过程由2个阶段组成,在主结晶期阶段Avrami指数为2.51～3.22,晶体为二维盘状方式生长,在次结晶期阶段指数为0.99～2.14,晶体为一维纤维状方式生长;用莫志深法修正的Avrami方程得到冷却速率值为14.91～37.57;利用Kissinger方法求得聚酰胺1211非等温结晶的结晶活化能为-115 kJ/mol。Aiming at the problems that the mechanical properties of polymer were influenced by the microcrystalline structure,polyamide 1211 was prepared by one-step polymerization,and the mechanical properties of polyamide 1211 were controlled by controlling the microcrystalline structure thereof.The nonisothermal crystallization of polyamide 1211 was studied by differential scanning calorimeter.Nonisothermal crystallization kinetics of polyamide 1211 was studied using the Avrami equations modified by Jeziorny method and Mo method.The results obtained by Jeziorny method exhibit that the nonisothermal crystallization kinetics of polyamide 1211 comprises two stages.The Avrami index is ranged from 2.51 to 3.22 during the main crystallization stage process,and the crystal grows in a two-dimensional disk state.In the sub crystallization stage process,the Avrami index is 0.99-2.14,and the crystal grows in a one-dimensional fiber state.The cooling rate value is 14.91-37.57.In addition,the activation energy of nonisothermal crystallization for polyamide 1211 acquired by Kissinger method is-115 kJ/mol.

关 键 词：长碳链聚酰胺1211 非等温结晶动力学 结晶活化能 晶型结构 

分 类 号：TQ323.6[化学工程—合成树脂塑料工业]