Article
  • Influences of Bridge Group on Thermal and Mechanical Properties of Epoxy Resins
  • Liu Yuan*,**,***, Zhao Jun****, Liu Ai-Qin****, Liu Xiao-Qing***, and Luo Jun*,†

  • *Engineering Research Center for Materials Protection of Wear and Corrosion of Guizhou Province, Guiyang University, Guiyang 550005 (P. R. China)
    **University of Chinese Academy of Sciences, Beijing 100049 (China)
    ***Key Laboratory of Bio-based Polymeric Materials Technology and Application of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201 (China)
    ****Shanghai Space Propulsion Technology Research Institute, No. 3888, Yuanjiang Road, Minhang District, Shanghai 201100 (P. R. China)

  • 에폭시 수지의 열 및 기계적 특성에 대한 Bridge Group의 영향
Abstract

In order to obtain thermosetting epoxy resin, it is the prerequisite condition that the epoxy precursor must contain at least two epoxy groups. Thus, bridge group is needed to link the epoxy groups, and naturally, the chemical structure of the bridge group may also influence the thermomechanical performances of the cured epoxy resin. However, literature about the effects of bridge group on properties of cured epoxy is seldom published. To fill the gap, three model epoxy monomers containing different bridge groups have been synthesized from 4,4'-dihydroxydiphenyl, 1,1-bis(4-hydroxyphenyl)cyclohexane and bisphenol A in this work. After chemical structure confirmation, all of the monomers are cured by methylhexahydrophthalic anhydride (HMMPA), and the properties of the obtained cured network are evaluated by differential scanning calorimetry (DSC), dynamic thermomechanical analysis (DMA), tensile test and scanning electron microscope (SEM). The results show that bulky bridge group can effectively increase the glass transition temperature, enhance the tensile strength, and enlarge elongation at break of the cured epoxy resin.


Keywords: epoxy, bridge group, thermomechanical performance

  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2018 Impact Factor : 0.500
  • Indexed in SCIE

This Article

  • 2020; 44(4): 415-424

    Published online Jul 25, 2020

  • 10.7317/pk.2020.44.4.415
  • Received on Nov 26, 2019
  • Revised on Mar 20, 2020
  • Accepted on Mar 25, 2020

Correspondence to

  • Luo Jun
  • Engineering Research Center for Materials Protection of Wear and Corrosion of Guizhou Province, Guiyang University, Guiyang 550005 (P. R. China)

  • E-mail: luojun_gyu@sina.com