PREPARATION AND PROPERTIES OF HIGH TEMPERATURE RESISTANT RESIN SYSTEM FOR HOT PRESSURE TANK INITIAL PRESSURE PROCESSING PREPREG

Abstract

Abstract: A high temperature resistant toughened epoxy resin (OXEP) was designed and synthesized. A tetrafunctional epoxy resin were modified by chemical rheological agent and OXEP to prepare a hot melt resin system which conformed to hot pressing tank initial pressure forming process. The effect of OXEP content on tensile,toughness and heat resistance of the resin system was studied. Mechanical properties of composites prepared by hot pressing tank initial pressure forming process and traditional process were compared. The results showed that the reaction time of chemical rheological agent should be controlled at 120 min. The addition of OXEP can effectively improve the mechanical properties of the cured resin. When OXEP modified epoxy is added at 32 phr, the tensile strength and impact strength of the modified resin are increased by 29% and 73%, respectively, and the fracture toughness is improved by 3.3 times. Tough fracture surface with deep ravines indicated high fracture energy dissipation, and thus remarkable toughening effect. The mechanical properties of the autoclave-compressed hot-melt composites are better than those of the conventional autoclave. The 0° tensile strength and shear strength of the composites are significantly improved, which are increased by 34.5% and 38.6%, respectively.

Key words: high temperature resistant toughenedepoxy resin, hot melt prepreg, hot pressure tank initial pressure, carbon fiber composites

CLC Number:

TB332

ZHANG Qi, WEI Zhen-hai, LIU Qian-li, XU Xiao-kui. PREPARATION AND PROPERTIES OF HIGH TEMPERATURE RESISTANT RESIN SYSTEM FOR HOT PRESSURE TANK INITIAL PRESSURE PROCESSING PREPREG[J]. Composites Science and Engineering, 2020, 0(8): 76-82.

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