碳纤维/改性双马来酰亚胺复合材料制备与性能  

Preparation and properties of carbon fabric reinforced modified BMI composites

作　　者：张慧 王林祥 郑庆 袁荞龙[1] 黄发荣[1] ZHANG Hui;WANG Lin-xiang;ZHENG Qing;YUAN Qiao-long;HUANG Fa-rong(School of Materials Science and Engineering,East China University of Science and Technology,Shanghai 200237,China;Shanghai Xinli Power Equipment Institute,Shanghai 200125,China)

机构地区：[1]华东理工大学材料科学与工程学院,上海200237 [2]上海新力动力设备研究所,上海200125

出　　处：《复合材料科学与工程》2022年第11期90-95,113,共7页Composites Science and Engineering

基　　金：上海航天科技创新基金(SAST2019-106)。

摘　　要：合成了4,4′-二苯醚二炔丙基醚(DPEDPE)和N-(3-乙炔基苯基)马来酰亚胺(3-EPM)两种含炔基化合物,并以熔融法与二苯甲烷型双马来酰亚胺(BDM)和二烯丙基双酚A(DABPA)共混制备了改性双马来酰亚胺树脂体系,对改性树脂的加工性能、热稳定性和力学性能进行了研究。用热压法制备了T300碳纤维布增强改性BDM/DABPA复合材料,对复合材料的热-力学性能也进行了研究。结果表明DPEDPE能扩展BDM/DABPA树脂的加工窗口,改性树脂可溶解在除乙醇的常用极性溶剂中。3-EPM改性BDM/DABPA树脂固化物在氮气中的5%热失重温度(T_(d5))与800℃残留率(Y_(r800℃))分别可达426℃和37.3%,其玻璃化转变温度(T_(g))达380℃以上。DPEDPE或3-EPM改性的BDM/DABPA树脂浇注体拉伸强度有所下降,但DPEDPE改性树脂的冲击强度可提升至19.6 kJ·m^(-2)。T300碳纤维布增强DPEDPE改性BDM/DABPA复合材料室温下的弯曲强度和层间剪切强度(ILSS)分别为547 MPa和32.8 MPa,在200℃下都可保留98%,在250℃下弯曲强度可保留90%,而ILSS则保留82%。4,4′-Dipropargyloxydiphenyl ether(DPEDPE) and N-(3-ethynylphenyl) maleimide(3-EPM) were synthesized as alkynyl-containing modifiers to blend with diphenylmethane bismaleimide(BDM) and diallyl bisphenol A(DABPA) system to prepare modified bismaleimide resins in melting method. The processability, thermal stability, and mechanical properties of alkynyl-containing compounds modified BDM/DABPA resins were studied. The carbon fabric reinforced modified BDM/DABPA composites were molded by hot-press. The thermal-mechanical properties of the composites were also studied. The results show that DPEDPE can broaden the processing window of BDM/DABPA resin. The alkynyl-containing compounds modified BDM/DABPA resins can dissolve in polar solvents except ethanol. The temperature of 5% weight loss(T_(d5)) and residual yield at 800 ℃(Y_(r800℃)) in N, and glass transition temperature(T_(g)) of the cured 3-EPM modified BDM/DABPA resin can reach 426 ℃, 37.3% and above 380 ℃, respectively. The tensile strength of the cured BDM/DABPA decreases with addition of DPEDEP or 3-EPM. However, the impact strength of the cured DPEDPE-modified BDM/DABPA can increase to 19.6 kJ·m^(-2). The T300 carbon fabric reinforced DPEDPE-modified BDM/DABPA composite possesses the flexural strength of 547 MPa and interlamellar shear strength(ILSS) of 32.8 MPa at room temperature, and retains the strength of 98% at 200 ℃. The flexural strength and ILSS of the composite can keep the flexural strength of the composite for 90%, and ILSS of the composite for 82% at 250 ℃, respectively.

关 键 词：双马来酰亚胺 含炔基改性剂 共混 复合材料 热-力学性能 

分 类 号：TB332[一般工业技术—材料科学与工程]