Peng Wanxin, Kang Jian, Song Xiuduo, Zhang Yue, Hu Bo, Cao Ya, Xiang Ming
State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China.
Key Laboratory of Combustion and Explosion Technology, Xi'an Modern Chemistry Research Institute, Xi'an 710065, China.
Polymers (Basel). 2021 Aug 31;13(17):2931. doi: 10.3390/polym13172931.
The effects of MXene on the crystallization behavior of β-nucleated isotactic polypropylene (iPP) were comparatively studied. The commonly used MXene TiCT was prepared by selective etching and its structure and morphology were studied in detail. Then MXene and a rare earth β-nucleating agent (NA) WBG-II were nucleated with iPP to prepare samples with different polymorphic compositions. The crystallization, melting behavior, and morphologies of neat iPP, iPP/MXene, iPP/WBG-II, and iPP/MXene/WBG-II were comparatively studied. The crystallization behavior analysis reveals that a competitive relationship exists between MXene and WBG-II when they were compounded as α and β nucleating agents. In the system, the β-nucleation efficiency (NE) of WBG-II is higher than α-NE of MXene. The β-phase has relatively low thermal stability and would transform to α-phase when cooled below a critical temperature.
比较研究了MXene对β成核等规聚丙烯（iPP）结晶行为的影响。通过选择性蚀刻制备了常用的MXene TiCT，并对其结构和形态进行了详细研究。然后将MXene与稀土β成核剂（NA）WBG-II与iPP进行成核，以制备具有不同多晶型组成的样品。比较研究了纯iPP、iPP/MXene、iPP/WBG-II和iPP/MXene/WBG-II的结晶、熔融行为及形态。结晶行为分析表明，当MXene和WBG-II作为α和β成核剂复合时，它们之间存在竞争关系。在该体系中，WBG-II的β成核效率（NE）高于MXene的α-NE。β相具有相对较低的热稳定性，当冷却至临界温度以下时会转变为α相。
