拉伸过程中温度和预成核对聚丁烯-1晶型转变的影响  

Effects of Temperature and Pre-nucleation on Strain-Induced Crystal Transition of Polybutene-1

作　　者：温帅 牛秀 岳倩倩 聂华荣 WEN Shuai;NIU Xiu;YUE Qianqian;NIE Huarong(College of Polymer Science and Engineering,Qingdao University of Science and Technology,Qingdao 266042,China)

机构地区：[1]青岛科技大学高分子科学与工程学院,山东青岛266042

出　　处：《青岛科技大学学报（自然科学版）》2023年第6期76-80,共5页Journal of Qingdao University of Science and Technology:Natural Science Edition

基　　金：国家自然科学基金项目(51973101);山东省自然科学基金项目(ZR2020KE014,ZR2019MB072,ZR2020ME0792);山东省重大科技创新工程项目(2019JZZY010352);泰山学者工程项目(2022)。

摘　　要：聚丁烯-1作为一种多晶态聚合物,在拉伸过程中晶体结构会逐渐由亚稳态的晶型Ⅱ转变为稳定的晶型Ⅰ。利用原位广角X射线衍射,研究了不同温度下聚丁烯-1在拉伸过程中的晶型转变,以及预成核过程对聚丁烯-1晶型转变的影响。结果发现:拉伸温度越高,晶型转变越慢;预成核可以加速聚丁烯-1的晶型转变;此外,拉伸温度越高,预成核对晶型转变的促进作用也越明显。As a polymorphic polymer,polybutene-1 undergoes crystal transition from metastable formⅡto stable formⅠduring a stretching process.In this study,the strain-induced crystal transition of polybutene-1 at different temperatures and the influence of pre-nucleation on the crystal transition were studied by in situ wide-angle X-ray diffraction.It was discovered that the crystal transition was retarded at a high stretching temperature,and the pre-nucleation could accelerate the crystal transition.Moreover,a higher stretching temperature gave rise to an improved acceleration of crystal transition when pre-nucleation was employed.

关 键 词：聚丁烯-1 晶型转变 预成核 拉伸温度 

分 类 号：TQ325.15[化学工程—合成树脂塑料工业]