Chem. J. Chinese Universities ›› 2021, Vol. 42 ›› Issue (12): 3757.doi: 10.7503/cjcu20210439

• Polymer Chemistry • Previous Articles     Next Articles

Preparation and Properties of 3-Methylcatechol/Furfurylamine Based Polybenzoxazine

CHEN Chen1, LU Xin1(), ZHAO Yudi1, WANG Litong1, XIN Zhong1,2   

  1. 1.Shanghai Key Laboratory of Multiphase Materials Chemical Engineering,School of Chemical Engineering
    2.State Key Laboratory of Chemical Engineering,East China University of Science and Technology,Shanghai 200237,China
  • Received:2021-06-25 Online:2021-12-10 Published:2021-09-28
  • Contact: LU Xin E-mail:lux@ecust.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(21776080);the Innovation Program of Shanghai Municipal Education Commission, China(2019?01?07?00?02?E00061)

Abstract:

3-Methylcatechol/furfurylamine benzoxazine(M-f) containing phenolic hydroxyl group was synthesized to develop a benzoxazine that could be cured at relatively low temperature. The peak exothermic temperature(Tp) of M-f measured by differential scanning calorimetry(DSC) is 172 ℃, while the Tp of meta-cresol/furfurylamine benzoxazine(MC-f) is 244 ℃, indicating that the introduction of phenolic hydroxyl groups is beneficial to reduce the ring-opening curing temperature of benzoxazine. The curing kinetics of the two benzoxazine monomers were studied by non-isothermal DSC methods. The calculation results of Kissinger method and Ozawa method both indicated that the apparent activation energy of M-f was lower than that of MC-f. In addition, the adhesion performance of polybenzoxazine to metal substrate was explored by lap shear strength testing. The testing results demonstrated that the lap shear strengths of the M-f polymer to the aluminum and mild steel substrates reached 2.53 MPa and 3.09 MPa, respectively, which were higher than those of the MC-f polymer.

Key words: Benzoxazine, Phenolic hydroxyl, Curing temperature, Adhesion property

CLC Number: 

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