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《工程塑料应用》 2021年第10期
DOI:10.3969/j.issn.1001-3539.2021.10.009
PPE改性液晶高分子及其吹膜性能
王雄伟12,周玉波2,楚少生2,刘小青1
1.中国科学院宁波材料技术与工程研究所,浙江宁波 315031; 2.宁波长阳科技股份有限公司,浙江宁波 315201 
PPE Modification LCP and Film Blowing of LCP
Wang Xiongwei12, Zhou Yubo2, Chu Shaosheng2, Liu Xiaoqing1
1. Ningbo Institute of Materials Technology & Engineering, CAS, Ningbo 315031, China; 2. Ningbo Solartron Technology Co., Ltd., Ningbo 315201, China 
摘要:采用聚苯醚(PPE)和马来酸酐接枝聚苯醚(PPE-g-MAH)对液晶高分子(LCP)进行改性,并通过吹塑法制备了LCP薄膜。采用旋转流变仪分析了改性LCP的熔体流变特性,使用动态热机械分析(DMA)仪表征了PPE与LCP的相容性,采用扫描电子显微镜(SEM)表征了LCP膜的断面形貌,并进一步研究了添加剂含量对薄膜外观、力学性能、线性热膨胀系数和介电性能的影响。结果表明,在PPE-g-MAH作用下,PPE与LCP基体之间呈现部分相容性,PPE的加入可以在不影响LCP熔体黏弹性的前提下有效提高它们的黏度,改善成膜性,并有效缓解LCP分子链的取向性和膜内原纤化现象。当添加剂的质量分数由0%增加至5%时,可以使LCP膜的横向拉伸强度从73 MPa提高到186 MPa,减小性能各向异性的同时并不损失LCP膜本身的优异高频介电性能。 
Abstract:Polyphenyl ester (PPE) and maleic anhydride grafted polyphenyl ester (PPE-g-MAH) were used to modify the liquid crystal polymer (LCP) resin, and then preparing the LCP film by blowing method. The effect of PPE on the rheological behavior of molten LCP was characterized by rotational rheometer, and the compatibility between PPE and LCP and the fractured morphology of LCP films were investigated by dynamic thermomechanical analyzer (DMA) and scanning electron microscope (SEM), respectively.The appearance, mechanical properties, coefficient of linear thermal expansion (CTE), dielectric performances at high frequency of the LCP films were further investigated respect to the contents of PPE. The results reveale that a partial miscibility is found between the PPE and LCP matrix with the effect of PPE-g-MAH. The introduction of PPE can increase the viscosity of LCP melt, but has no visible effect on its viscoelasticity behavior, which is beneficial to improving its film-forming capability and relieving the orientation of LCP chains as well as the fibrillation inside the final LCP films. Moreover, it is further found that when of additives content from 0% to 5% in LCP films can improve their tensile strength from 73 MPa to 186 MPa in the transverse direction, reducing the anisotropy, without sacrificing the high-frequency dielectric properties of the films. 
关键词:液晶高分子;聚苯醚;取向;流变特性;各向异性 
Keywords:liquid crystal polymer; polyphenyl ester; orientation; rheological behavior; anisotropy 
本文引用格式:
王雄伟,周玉波,楚少生,等. PPE改性液晶高分子及其吹膜性能[J].工程塑料应用,2021,49(10):44-49.
Wang Xiongwei,Zhou Yubo,Chu Shaosheng,et al. PPE modification LCP and film blowing of LCP[J]. Engineering Plastics Application,2021,49(10 ):44-49. 

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