Synthesis and rheological properties of high heat resistant linear epoxy resin

doi:10.19936/j.cnki.2096-8000.20240228.003

Abstract

Abstract: A modified binary amine (PDP) was synthesized by the Michael addition reaction of N-phenylmaleimide (N-PMI) with 4,4′-diaminodiphenyl methane (DDM), and the linear epoxy resin was prepared by the reaction with bisphenol A epoxy resin. The chemical structure and properties of PDP were studied by hydrogen magnetic resonance spectroscopy (HNMR), infrared spectroscopy (FTIR) and differential scanning calorimetry (DSC). The thermal resistance (T_g) and rheological properties of linear epoxy resin were studied by DSC, FTIR and gel permeation chromatography (GPC). The results showed that the viscosity of EP/PDP(1∶1 molar ratio) resin system increased from 0.55 Pa·s to 57 Pa·s with the extension of reaction time, while T_g increased from 55 ℃ to 120 ℃, ant the average molecular weight increased from 4 651 to 25 096. With the decrease of temperature, the viscosity of the system increases from 0.55 Pa·s at 200 ℃ to 60 Pa·s at 140 ℃. The T_g of EP/PDP resin system with different proportions increased with the increase of PDP excess ratio. When EP∶PDP was 0.8∶1, T_g was 121 ℃. At the same reaction time, the viscosity of the system increased with the increase of PDP excess ratio.

Key words: modified diamine, linear epoxy resin, 4,4′-diaminodiphenyl methane, N-phenyl maleimide, composites

CLC Number:

TB332

ZHANG Xiangchang, WANG Jun, CHEN Xi. Synthesis and rheological properties of high heat resistant linear epoxy resin[J]. COMPOSITES SCIENCE AND ENGINEERING, 2024, 0(2): 20-26.

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