| 耐高温碳纤维/双马来酰亚胺树脂复合材料制备及性能 |
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| 引用本文： | 吴佳奇,李刚,杨小平,苏清福.耐高温碳纤维/双马来酰亚胺树脂复合材料制备及性能[J].复合材料学报,2020,37(7):1505-1512. |
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| 作者姓名： | 吴佳奇 李刚 杨小平 苏清福 |
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| 作者单位： | 1.北京化工大学 有机无机复合材料国家重点实验室，北京 100029 |
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| 摘 要： | 采用前原位聚合的热塑性聚酰亚胺(PI)改性4,4′-二氨基二苯甲烷双马来酰亚胺(BDM)/4,4′-邻二烯丙基双酚A(DABPA)树脂体系，制备了一种耐高温的改性双马来酰亚胺(BDPI)树脂，研究了BDPI树脂的微观形貌和耐热性能；通过前原位自增强技术制备了T800H碳纤维/BDPI预浸料，通过SEM研究了T800H/BDPI预浸料表面形貌，评价了T800H/BDPI复合材料高低温力学性能和断面微观形貌。结果表明:BDPI树脂满足预浸料加工工艺要求，BDM微米颗粒均匀铺覆于T800H/BDPI预浸料表面，粒径分布为30~70 μm，BDPI树脂固化物的玻璃化转变温度(Tg)为367℃，5%热失重温度(Td5)为452℃；T800H/BDPI单向复合材料0°拉伸强度、0°拉伸模量和层间剪切强度分别为2 440 MPa、148 GPa和107 MPa，280℃其力学性能保持率分别为66.4%、87.2%和44.1%。
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| 关 键 词： | 双马来酰亚胺 碳纤维 预浸料 复合材料 耐热性能 力学性能 |
| 收稿时间： | 2019-08-04 |
Preparation and properties of carbon fiber/bismaleimide resin composites with high heat resistance |
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| Affiliation: | 1.State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China2.Changzhou Institute of Advanced Materials, Beijing University of Chemical Technology, Changzhou 213164, China |
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| Abstract: | The 4,4′-diaminodiphenylmethane bismaleimide (BDM)/4,4′-o-diallylbisphenol A (DABPA) resin system was modified by synthesized thermoplastic polyimide (PI) via pre-in situ polymerization, used to prepare modified bismaleimide resin with high heat resistance (BDPI). The micromorphology and heat resistance of BDPI resin were investigated. The T800H carbon fiber/BDPI prepreg was fabricated through pre-in situ self-strengthening technology. The surface morphology of T800H/BDPI prepreg was studied by SEM. The mechanical properties and fracture morphology of T800H/BDPI composites at room temperature and high temperature were evaluated. The results show that the BDPI resin is suitable for prepreg processing technology, and the BDM microparticles with 30–70 μm size are well covered on the surface of T800H/BDPI prepreg. The glass transition temperature (Tg) and 5% mass loss temperature (Td5) of the cured BDPI resin reach 367℃ and 452℃, respectively. The 0° tensile strength, 0° tensile modulus and interlaminar shear strength of T800H/BDPI unidirectional composites are 2 440 MPa, 148 GPa and 107 MPa, respectively, the retention of which are approximately 66.4%, 87.2% and 44.1% at 280℃, respectively. |
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