• 文献标题:   Effects of Modified Graphene Oxide on Thermal and Crystallization Properties of PET
  • 文献类型:   Article
  • 作  者:   XING L, WANG Y, WANG SC, ZHANG Y, MAO S, WANG GH, LIU JX, HUANG LJ, LI H, BELFIORE LA, TANG JG
  • 作者关键词:   pet, functionalized graphene oxide, thermal stability, crystallization property
  • 出版物名称:   POLYMERS
  • ISSN:  
  • 通讯作者地址:   Qingdao Univ
  • 被引频次:   2
  • DOI:   10.3390/polym10060613
  • 出版年:   2018

▎ 摘  要

In this article, graphene oxide nanosheets grafted with low molecular weight poly(ethylene terephthalate) were in situ synthesized via carboxylation, acyl chlorination and grafting modification in order to improve the compatibility between GO and PET phases and enhance the thermal stability and crystallization properties of PET. Fourier Transform Infrared (FTIR), X-ray Photoelectron Spectroscopy (XPS), and Atomic Force Microscopy (AFM) characterization results demonstrated that LMPET chains have been successfully grafted onto the surface of GO. To further investigate the influence of modified GO on properties of PET, modified PET was prepared by incorporating the GL-g-LMPET nanofillers into the PET matrix using the melt-blending method. Due to the similar polarity and strong interaction between LMPET and PET molecules, GL-g-LMPET nanofillers were homogeneously dispersed in PET matrix. Thermal properties and crystallization properties of obtained nanocomposites were systematically characterized using Differential Scanning Calorimetry (DSC), X-ray Diffraction (XRD), and Thermo Gravimetric Analysis (TGA). Results show that GL-g-LMPET nanofillers could improve the thermal stability of PET, e.g., increase up to 16.6 degrees C in temperature at the maximum rate of weight loss. In addition, the GL-g-LMPET also acts as an efficient nucleating agent for PET, exhibiting (1) higher crystallization temperatures; (2) higher degrees of crystallinity; and (3) faster rates of crystallization.