The Effect of Nonlinear Bisphenol Structures on the Properties of Thermotropic Liquid Crystalline Polyarylates

Qing-bao Guan; Hai-yang Zhang; Xiao-yuan Deng; Chao-feng Chen; Zheng-wei You

doi:10.11777/j.issn1000-3304.2026.25272

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The Effect of Nonlinear Bisphenol Structures on the Properties of Thermotropic Liquid Crystalline Polyarylates

Research Article | 更新时间：2026-04-01

- The Effect of Nonlinear Bisphenol Structures on the Properties of Thermotropic Liquid Crystalline Polyarylates
- Acta Polymerica Sinica Vol. 57, Issue 4, Pages: 868-876(2026)
- 作者机构：
  
  1.东华大学材料科学与工程学院先进纤维材料全国重点实验室上海 201620
  2.高技术有机纤维及复合材料四川省重点实验室成都 610042
- 作者简介：
  
  Qing-bao Guan, E-mail: qbguan@dhu.edu.cn
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2026.25272
  CLC：
- CSTR：32057.14.GFZXB.2026.7549
- Received：08 December 2025，
  
  Accepted：05 January 2026，
  
  Online First：04 March 2026，
  
  Published：20 April 2026
- 稿件说明：
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管清宝, 张海洋, 邓晓媛, 陈超峰, 游正伟. 非线型双酚结构对热致液晶聚芳酯性能的影响. 高分子学报, 2026, 57(4), 868-876.

Guan, Q. B.; Zhang, H. Y.; Deng, X. Y.; Chen, C. F.; You, Z. W. The effect of nonlinear bisphenol structures on the properties of thermotropic liquid crystalline polyarylates. Acta Polymerica Sinica (in Chinese), 2026, 57(4), 868-876.
管清宝, 张海洋, 邓晓媛, 陈超峰, 游正伟. 非线型双酚结构对热致液晶聚芳酯性能的影响. 高分子学报, 2026, 57(4), 868-876. DOI： 10.11777/j.issn1000-3304.2026.25272. CSTR： 32057.14.GFZXB.2026.7549.

Guan, Q. B.; Zhang, H. Y.; Deng, X. Y.; Chen, C. F.; You, Z. W. The effect of nonlinear bisphenol structures on the properties of thermotropic liquid crystalline polyarylates. Acta Polymerica Sinica (in Chinese), 2026, 57(4), 868-876. DOI： 10.11777/j.issn1000-3304.2026.25272. CSTR： 32057.14.GFZXB.2026.7549.

摘要

热致液晶聚芳酯(TLCP)是一类具有独特液晶凝聚态结构的高性能聚合物，对其性能的调控是值得关注的问题. 非线型双酚单体引入是TLCPs性能调控的有效手段，但其非线型结构与连接键对TLCPs的影响规律尚不明确. 本工作采用一步熔融缩聚法，通过引入具有不同连接键的非线型双酚单体，设计合成了一系列TLCPs，并对其熔融结晶行为、热机械性能、热稳定性、流变性能及微观形貌进行了表征. 结果表明，非线型双酚单体的引入可以显著改变TLCPs主链规整度及分子间作用力，进而改变TLCPs熔融结晶行为及流变性能. 但非线型双酚单体中存在的弱连接键导致对应的TLCPs热稳定性降低，并且非线型双酚单体引入可能会导致部分TLCPs存在刚性域和柔性域的不均匀分布，进而导致模量存在双重台阶式下降的情况.

Abstract

Thermotropic liquid crystalline polyarylates (TLCPs) are high-performance polymers with unique nematic phases and the regulation of their performance is always an issue of significant interest. The introduction of nonlinear bisphenol monomer is recognized as an effective method

however

the effects of nonlinear chemical structures and linkage on the properties of TLCPs have not been clearly understood. In this study

a series of TLCPs with various nonlinear bisphenol monomers were synthesized

via

one-step melt polycondensation. The melting and crystallization behaviors

thermomechanical properties

thermal stability

rheological behavior

and microscopic morphology were investigated. The results indicated that the nonlinear chemical structure disrupted the molecular chain regularity

thereby enabling effective regulation of the crystallization and rheological behavior. The presence of weak bonds in nonlinear bisphenols reduced the thermal stability of the TLCPs. Moreover

the incorporation of nonlinear bisphenol monomers led to an inhomogeneous distribution of rigid and flexible domains in certain TLCPs

which consequently resulted in a two-step decrease in the modulus.

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references

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