Preparation and Properties of 3-Methylcatechol/Furfurylamine Based Polybenzoxazine

doi:10.7503/cjcu20210439

Abstract

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（T_p） of M-f measured by differential scanning calorimetry（DSC） is 172 ℃， while the T_p 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:

O632.7

TrendMD:

CHEN Chen, LU Xin, ZHAO Yudi, WANG Litong, XIN Zhong. Preparation and Properties of 3-Methylcatechol/Furfurylamine Based Polybenzoxazine[J]. Chem. J. Chinese Universities, 2021, 42(12): 3757.

Figures/Tables 14

References 22

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