热压罐始加压预浸料用高温树脂体系的制备与性能研究

复合材料科学与工程 ›› 2020, Vol. 0 ›› Issue (8): 76-82.

热压罐始加压预浸料用高温树脂体系的制备与性能研究

张琦^1,2, 韦振海³, 刘千立^1,2*, 徐小魁^1,2

1.上海复合材料科技有限公司,上海201112;
2.上海航天树脂基复合材料工程技术研究中心,上海201112;
3.北京化工大学常州先进材料研究院,常州213164

收稿日期:2019-11-11 出版日期:2020-08-28 发布日期:2020-08-28
通讯作者: 刘千立(1985-),男,博士,高级工程师,主要从事航天树脂基复合材料与应用方面的研究,liuqianli1609@163.com。
作者简介:张琦(1993-),男,硕士,助理工程师,主要从事航天树脂基复合材料与应用方面的研究。
基金资助:
上海市青年科技启明星计划(18QB1401200)

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

ZHANG Qi^1,2, WEI Zhen-hai³, LIU Qian-li^1,2*, XU Xiao-kui^1,2

1. Shanghai Composite Materials Technology Co., Ltd., Shanghai 201112, China;
2. Shanghai Engineering Research Center of Aerospace Resin Based Composite, Shanghai 201112, China;
3. Changzhou Institute of Advanced Materials, Beijing University of Chemical Technology, Changzhou 213164, China

Received:2019-11-11 Online:2020-08-28 Published:2020-08-28

摘要/Abstract

摘要： 本文设计合成了一种噁唑烷酮环结构高温韧性环氧树脂(OXEP),采用化学流变剂调节和OXEP改性四官能团环氧树脂,制备符合热压罐始加压成型工艺的热熔法专用树脂体系。研究了OXEP含量对树脂体系拉伸性能、韧性和耐热性的影响,利用热压罐始加压成型工艺制备碳纤维复合材料,并与常规热压罐工艺复合材料力学性能进行对比。结果表明:化学流变剂反应120 min可达到始加压工艺要求;OXEP的加入可有效改善固化树脂的力学性能,加入OXEP改性环氧32 phr时,改性树脂的拉伸强度和冲击强度相对于未改性树脂分别提升了29%和73%,断裂韧性提高了3.3倍;改性树脂试样断裂面微观形貌较为粗糙,且有较深的沟壑,断裂耗散的能量较多,增韧效果明显;热压罐始加压热熔法复合材料力学性能优于常规热压罐工艺,复合材料0°拉伸强度和层间剪切强度提升明显,分别提高了34.5%和38.6%。

关键词: 高温韧性环氧, 热熔法预浸料, 热压罐始加压, 碳纤维复合材料

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

中图分类号:

TB332

张琦, 韦振海, 刘千立, 徐小魁. 热压罐始加压预浸料用高温树脂体系的制备与性能研究[J]. 复合材料科学与工程, 2020, 0(8): 76-82.

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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