聚偏氟乙烯/聚醚型热塑性聚氨酯弹性体共混物的相互作用及增容机理  

Interfacial Interaction and Compatibilizing Mechanism of PVDF/TPU Blends

作　　者：闫飞[1] 张敏[1,2] 张璐 李成涛[2] 李艺晨 

机构地区：[1]陕西科技大学化学与化工学院 [2]陕西科技大学环境科学与工程学院,西安710021

出　　处：《高等学校化学学报》2017年第5期888-895,共8页Chemical Journal of Chinese Universities

基　　金：陕西省自然科学基础研究计划项目(批准号:2015JM2069);陕西省技术转移与重点科技成果推广计划项目(批准号:2016CG-10);咸阳市科学技术研究计划项目(批准号:2016K02-19)资助~~

摘　　要：采用流延成膜法制备了4种增容改性的聚偏氟乙烯(PVDF)与聚醚型热塑性聚氨酯弹性体(TPU)固体共混物(PVDF/TPU).结合分子动力学模拟研究了PVDF/TPU的相互作用,并探讨了其增容机理.研究结果表明,与PVDF/TPU-1,PVDF/TPU-2及PVDF/TPU-3相比,加入γ-缩水甘油醚氧丙基三甲氧基硅烷-端氨基丁腈橡胶(GPTMS-ATBN)后,PVDF/TPU-4的2个玻璃化转变温度(T_g)相互靠近,两相界面存在分布梯度,构成了双相连续的微观结构,表明GPTMS-ATBN增容PVDF/TPU共混物具有显著效果.同时,PVDF/TPU-4的共混结合能大幅减小,二面角扭转能、键角弯转能等明显增大,表明PVDF及TPU与GPTMS-ATBN之间发生相互作用.傅里叶红外光谱(FTIR)及X射线光电子能谱(XPS)证实了GPTMS-ATBN增容PVDF/TPU的机理为GPTMS-ATBN中ATBN链段与PVDF彼此缠绕,相互混溶,而水解后两端GPTMS中大量羟基与TPU分子链中氨基甲酸酯键及醚键相互吸附,从而生成了氢键.It is supposed that the adding of compatibilizer can play an important role on the compatibility of composite systems. In order to study on the effect of compatibilizer [ y-glycidoxypropyltrimethoxysilane （GPTMS）, amine-terminated bntadiene acrylonitrile rubber（ATBN） and y-glycidoxypropyhrimethoxysilane- amine-terminated butadiene acrylonitrile rubber （ GPTMS-ATBN ） ] on the compatibility of poly （ ethylene fluoride） （PVDF） and thermoplastic polyurethane （ TPU ） compatibilizer modified PVDF/TPU solid blends were prepared by compatibilizer combined with PVDF/TPU as matrix by solution casting, the interactions of PVDF/TPU blends were investigated by molecular simulation. Besides, the mechanism of compatibilization of the blends was deeply discussed by Fourier transform infrared spectroscopy （FTIR） and X-ray photoelectron spectroscopy（XPS）. The results showed that compared with PVDF/TPU-1, PVDF/TPU-2 and PVDF/TPU-3, the molecular interactions existed between functional groups in PVDF/TPU-4 blends which were explained by the two temperature of glass transition （ Tg ） of PVDF/TPU-4 moved toward each other in DSC, distribution gra-dient existed in the interface of the two phases in the blends and a continuous two-phase microstructure was constituted after adding GPTMS-ATBN. All of these results displayed that GPTMS-ATBN played a significant effect on the compatibility of PVDF/TPU-4 blends. Moreover, the mixing energy of PVDF/TPU/-4 blends was significantly lower. Meanwhile, the values of bond energy, dihedral energy, angle energy and Vdw energy of the PVDF/TPU-4 blends were greater than the corresponding values of the others. It presented that molecular interactions were formed in PVDF, TPU and GPTMS-ATBN. The molecular simulation results were in agreement with the experimental results. Furthermore, based on FTIR and XPS, the compatibilizing mecha- nism of GPTMS-ATBN for PVDF/TPU was that the interwinding existed between the chain of ATBN and PVDF. In addition, the hydrogen bonding i

关 键 词：分子动力学 聚偏氟乙烯 聚醚型热塑性聚氨酯弹性体 增容剂 氢键作用 

分 类 号：O631[理学—高分子化学] TQ31[理学—化学]