塑料科技2025，Vol.53Issue(1)：35-40,6.DOI:10.15925/j.cnki.issn1005-3360.2025.01.006
聚四氟乙烯共混改性液晶聚芳酯的微观结构与性能研究
Study on Microstructure and Properties of Liquid Crystal Polyarylate Modified by Blending of Polytetrafluoroethylene
高湛 1邵伟光 2李万利 2蔡利海 2王鑫 2叶海木3
作者信息
- 1. 军事科学院系统工程研究院,北京 100071||中国石油大学(北京),北京 102249
- 2. 军事科学院系统工程研究院,北京 100071
- 3. 中国石油大学(北京),北京 102249
- 折叠
摘要
Abstract
Liquid crystal polyarylate(LCP)possesses very low melt viscosity due to the rigid rod-shaped structure of its main chain,which is not beneficial for film processing and molding.The study aims to enhance the melt viscosity of LCP through blending modification with polytetrafluoroethylene(PTFE),while ensuring excellent mechanical properties,dimensional stability,and low dielectric performance at high frequencies.Rheological properties results of the blends indicate that the melt viscosity gradually increases with the addition of PTFE.Dielectric properties results of the prepared thin films indicate that the incorporation of PTFE significantly reduces the dielectric constant and dielectric loss of the blend films.The LCP/5%PTFE blend film possesses a dielectric constant of 3.15 and a dielectric loss of 0.013 5 under the condition of 1 MHz,representing a decrease of 7.1%and 24.9%compared to pure LCP.SEM images reveal that the incorporation of high-viscosity PTFE restricts the formation of the original long-range fibrous structure of LCP.Furthermore,thermal performance test results indicate that both the melting point and degradation temperature of the blends increase with an increasing proportion of PTFE in the blend.关键词
液晶聚芳酯/聚四氟乙烯/熔体黏度/介电性能Key words
Liquid crystal polyarylate/Polytetrafluoroethylene/Melt viscosity/Dielectric properties分类
化学化工引用本文复制引用
高湛,邵伟光,李万利,蔡利海,王鑫,叶海木..聚四氟乙烯共混改性液晶聚芳酯的微观结构与性能研究[J].塑料科技,2025,53(1):35-40,6.
