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
王翔宇 1杨锋 1达晓玲 1蓝方1
作者信息
- 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
- 折叠
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.
Abstract
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Key words
Polybutene-1/Crystal Polymorphic Transformation/1,6-Adipic Acid/Crystallization Temperature/Lattice Matching/Crystallinity引用本文复制引用
出版年
2024
NETL
NSTL
万方数据