CJCU

Chem. J. Chinese Universities ›› 2017, Vol. 38 ›› Issue (5): 888.doi: 10.7503/cjcu20160822

• Polymer Chemistry • Previous Articles     Next Articles

Interfacial Interaction and Compatibilizing Mechanism of PVDF/TPU Blends

YAN Fei1, ZHANG Min1,2, ZHANG Lu1, LI Chengtao2, LI Yichen1   

  1. 1. Department of Chemistry and Chemical Engineering, Xi'an 710021, China;
    2. School of Environmental Science and Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
  • Received:2016-11-23 Revised:2017-04-18 Online:2017-05-10 Published:2017-04-18
  • Supported by:

    Supported by the Fundamental Research Project of Natural Science of Shaanxi Province, China(No.2015JM2069), the Research Fund of the People's Government of Shaanxi Province, China(No.2016CG-10) and the Science and Technology Research Project of Xianyang City of Shaanxi Province, China(No.2016K02-19).

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Abstract:

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[γ-glycidoxypropyltrimethoxysilane(GPTMS), amine-terminated butadiene acrylonitrile rubber(ATBN) and γ-glycidoxypropyltrimethoxysilane-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 mechanism of GPTMS-ATBN for PVDF/TPU was that the interwinding existed between the chain of ATBN and PVDF. In addition, the hydrogen bonding interactions displayed between the hydroxyl groups in the chain of hydrolytic GPTMS and the ether groups in TPU. The same intermolecular interactions produced between the hydroxyl groups and amino formic acid ester groups of GPTMS and TPU.

Key words: Molecular dynamics, Poly(ethylene fluoride), Thermoplastic polyurethane, Compatibilizer, Hydrogen bonding

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