POM/MWNTs-PEG复合材料的制备和结晶性能研究  

Study on Preparation and Crystallization of Polyoxymethylene/ Poly(ethylene glycol)-Grafted Multiwalled Carbon Nanotubes Composites

作　　者：张旭亮 邹易谙 崔新盼 石家华[1] 张予东[2] ZHANG Xuliang;ZOU Yian;CUI Xinpan;SHI Jiahua;ZHANG Yudong(The Key Laboratory of Natural Medicine and Immuno-Engineering, Henan University,Kaifeng 475004,China;College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China)

机构地区：[1]河南大学天然药物与免疫工程重点实验室,河南开封475004 [2]河南大学化学化工学院,河南开封475004

出　　处：《中国塑料》2019年第1期17-23,共7页China Plastics

基　　金：河南省教育厅基础研究项目(0001F01124);河南大学第十六批教改项目(HDXJJG2016-067)

摘　　要：采用原子转移自由基聚合的方法将聚乙二醇(PEG)接枝到多壁碳纳米管(MWNTs)上,然后利用平板硫化机制备出聚甲醛(POM)/MWNTs-PEG复合材料。利用扫描电子显微镜、透射电子显微镜、红外光谱和热重分析对MWNTs-PEG进行表征。通过差式扫描量热仪研究了该复合材料结晶行为的变化,用Jeziorny法和Mo法对其进行非等温结晶动力学分析。结果表明,PEG均匀接枝到MWNTs上;MWNTs-PEG的加入具有异相成核的作用,使POM结晶温度向高温区移动,结晶速率提高,半结晶时间缩短;结晶速率常数值增加,F(T)值降低;有效结晶活化能降低;MWNTs-PEG最终起到促进POM结晶的作用。Poly(ethylene glycol)(PEG) was grafted onto multiwalled carbon nanotubes (MWNTs) by atom transfer radical polymerization, and its structure and performance of MWNTs-PEG was investigated with scanning electron microscopy,transmission electron microscopy,infrared spectroscopic and thermogravimetric analysis. The POM/MWNTs-PEG composite films were prepared by heat compression, and their crystallizations behaviors and non-isothermal crystallization kinetics were studied by differential scanning calorimetry using Jeziorny's and Mo's methods. The effect of MWNTs-PEG on the performance of composites was also investigated. The results indicated that PEG was successfully grafted onto MWNTs, and the presence of MWNTs-PEG generated a heterogeneous nucleation effect on the crystallization of POM. As a result, the crystallization temperature and crystallization rate were improved, and the crystallization time was shortened accordingly. The crystallization kinetic investigation indicated that the crystallization rate constant of POM/MWNTs-PEG composites increased but the F(T) value decreased. Moreover,the effective crystallization activation energy was reduced, suggesting a promoting effect of MWNTs-PEG on the crystallinity of POM.

关 键 词：聚甲醛 碳纳米管 聚乙二醇 非等温结晶 

分 类 号：TQ326.51[化学工程—合成树脂塑料工业]