1,6-己二酸对聚丁烯-1的结晶行为及晶型转变的影响  

Influence of 1,6-Adipic Acid on the Crystallization Behaviors and Crystal Polymorphic Transformation of Polybutene-1

作　　者：王翔宇 杨锋[1] 达晓玲 蓝方[1] WANG Xiangyu;YANG Feng;DA Xiaoling;LAN Fang(College of Polymer Science and Engineering,State Key Laboratory of Polymer Materials Engineering,Sichuan University,Chengdu 610042,China)

机构地区：[1]四川大学高分子科学与工程学院,高分子材料工程国家重点实验室,四川成都610042

出　　处：《塑料工业》2024年第6期55-62,共8页China Plastics Industry

摘　　要：本文采用示差扫描量热仪(DSC)和偏光显微镜(POM)等设备研究了聚丁烯-1(PB-1)中加入1,6-己二酸(AA)之后的结晶行为、晶型转变行为及其机理,所获得的复合材料为PB-1/AA。实验结果表明,加入1%质量分数的AA能够显著提升PB-1/AA的结晶温度及晶型转化速度。POM的结果显示,加入AA能够使得PB-1/AA晶体结构松散,这与I型晶体结构相似,疏松的结构有利于II-I相转变。DSC的结果显示,AA能提高PB-1/AA的转化过冷度、结晶温度及结晶度,也能在转化过程中提高PB-1/AA的晶片厚度,使得PB-1/AA非晶区的系带分子和缠结环数量减少。连续自成核退火实验(SSA)结果表明,AA与PB-1的I型晶体存在一定的晶格匹配,从而加速PB-1/AA的相转变。The composite(PB-1/AA)was prepared by adding 1,6-adipic acid(AA)to polybutene-1(PB-1).This article investigated the crystallization behaviors,crystal polymorphic transformation behaviors,and their mechanisms of PB-1/AA by using differential scanning calorimeter(DSC),polarizing microscopy(POM),and other equipment.Experimental results demonstrate that the addition of AA with a mass fraction of 1%significantly enhances the crystallization temperature and crystal polymorphic transformation rate of PB-1/AA.POM results indicate that the addition of AA loosens the crystal structures of PB-1/AA,the resulting structures are similar to the structures of Type I crystals.The loose structures promote the II-I phase transition.DSC results show that AA increases the supercooling degree,crystallization temperature,and crystallinity of PB-1/AA.AA could also thicken the PB-1/AA crystals during the transformation process,reducing the number of entangled chains and entanglement rings in the amorphous regions of PB-1/AA.Additionally,the data of continuous self-nucleation annealing test(SSA)suggest a certain lattice matching between AA and the Type I crystals of PB-1,accelerating the phase transitions of PB-1/AA.

关 键 词：聚丁烯-1 晶型转变 1 6-己二酸 结晶温度 晶格匹配 结晶度 

分 类 号：TQ325.1+5[化学工程—合成树脂塑料工业]