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Novel phthalonitrile-based composites with excellent processing, thermal, and mechanical properties
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论文类型: 期刊论文
发表时间: 2018-08-01
发表刊物: HIGH PERFORMANCE POLYMERS
收录刊物: SCIE
卷号: 30
期号: 6
页面范围: 720-730
ISSN号: 0954-0083
关键字: Phthalonitrile resin; composites; processability; thermal and mechanical properties; novel curing agent
摘要: Phthalonitrile resins exhibit excellent thermostability and mechanical strength after curing. However, poor processability made them difficult to fabricate fiber-reinforced composites with desirable integrated performance. In this article, a novel mixed phthalonitrile resin was developed to be used as the matrix for glass fiber-reinforced laminates. Poly (aryl ether nitrile phthalazinone) oligomer end-capped by phthalonitrile units (PPEN-PN) was firstly designed and blended with bisphenol-based phthalonitrile monomers (BP-PN) (Figure 1), which were obtained according to the literature procedure. A novel mixed curing agent (zinc chloride and 4,4-diamine-diphenylsulfone) was also exploited to accelerate curing rate of the resins. Solubility tests, differential scanning calorimetry and rheological studies revealed that the mixed resins exhibited good processability with low processing viscosity. Thermal gravimetric analysis indicated that the cured resins were stable below 530 to approximately 570 degrees C in nitrogen atmosphere after low-cost curing procedure. In air, char yields of the resins were between 30 to approximately 40% when heated to 800 degrees C. The laminates reinforced by E-glass fiber cloth possessed a bending strength of 668 MPa with interlaminar shear strength of 84.6 MPa at room temperature. 50% of the strength and modulus was maintained when heated to 400 degrees C. Consequently, this type of laminates may be potential candidates for aerospace applications.

蹇锡高

教授   博士生导师   硕士生导师

性别: 男

毕业院校:大连工学院

学位: 硕士

所在单位:化工学院

学科:高分子材料. 高分子化学与物理. 膜科学与技术

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电子邮箱:jian4616@dlut.edu.cn

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