广州化学2025，Vol.50Issue(4)：15-19,5.DOI:10.16560/j.cnki.gzhx.20250413
含羟基侧基的联苯型液晶聚酯的制备及性能
Preparation and Properties of Biphenyl-type Liquid Crystal Polyesters Containing Hydroxyl Side Groups
摘要
Abstract
Flexible dielectrics with large dielectric constant coupled with low loss are highly pursued in many applications.A thermal conductivity liquid crystal polyester was successfully designed and prepared by biphenyl diols and methylenedisalicylic acid as raw materials,through a"one pot"melt polycondensation method.The polyester structure was characterized by Fourier infrared spectroscopy and X-ray diffraction.Differential Scanning Calorimetry and Thermal Weight Loss Analysis were used to characterized the thermal properties.The thermal conductivity was characterized using infrared thermography and hotline method.The results showed that the synthesized polyesters have good thermal conductivity,high dielectric constant,and excellent thermal stability.HPE has a thermal conductivity of 0.214 W/(m·K),which is a 142%improvement over conventional thermoplastics.The dielectric constant and dielectric loss were 5.03 and 0.01,respectively.Furthermore,the T5%,Tmax and residual carbon at 800℃ of HPE were 342.8℃,441.7℃and 17.83%,respectively.This work provides new directions for designing new polymer-based dielectric and functional materials.关键词
液晶聚酯/热稳定性/本征导热/介电常数/介电损耗Key words
liquid crystal polyester/thermal stability/intrinsic thermal conductivity/dielectric constant/dielectric loss分类
通用工业技术引用本文复制引用
杨盼盼,吴昆,卢晓婷,黄鹏飞,杨博,史珺,杨立..含羟基侧基的联苯型液晶聚酯的制备及性能[J].广州化学,2025,50(4):15-19,5.基金项目
东莞市重点领域研发项目(20231200300012) （20231200300012）
