Synthesis and polymerization kinetics of bio-based liquid crystal polyesters based on plant-derived phenolic acid

IF 4.5 3区工程技术 Q1 CHEMISTRY, APPLIED

Reactive & Functional Polymers Pub Date : 2024-08-06 DOI:10.1016/j.reactfunctpolym.2024.106022

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Abstract

Liquid crystal polyesters (LCPs) have been employed in various applications, however, their sustainability of the replacement of petroleum-based materials by biomass resources remains a challenge. In particular, using low-cost, readily available bio-based monomers to synthesize LCPs is rarely explored. Herein, vanillic acid and ferulic acid as easily accessible plant-derived phenolic acids are used to prepare bio-based LCPs. Liquid crystal behaviors of the as-prepared LCPs can be observed through a polarized optical microscope, and their polymerization kinetics are studied by thin-film polymerization technique to reveal the relationship between the copolymerization composition and liquid crystal (LC) behaviors. The formation of LC for the as-prepared LCPs can be promoted by the increase of vanillic acid composition but inhibited by the increased ferulic acid composition. The prepared bio-based LCPs show high thermal stability with high glass transition temperatures of over 80 °C and high decomposition temperature of about 300 °C. This work develops two available bio-based monomers for preparing LCPs, showing a good promise in sustainability.

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基于植物酚酸的生物基液晶聚酯的合成和聚合动力学

液晶聚酯（LCP）已被广泛应用于各种领域，然而，用生物质资源替代石油基材料的可持续性仍然是一个挑战。尤其是利用低成本、易获得的生物基单体合成液晶聚酯的研究还很少。在本文中，香草酸和阿魏酸作为容易获得的植物源酚酸被用来制备生物基 LCP。通过偏振光学显微镜观察制备的 LCP 的液晶行为，并利用薄膜聚合技术研究其聚合动力学，从而揭示共聚成分与液晶行为之间的关系。结果表明，香草酸成分的增加会促进所制备 LCP 的液晶形成，而阿魏酸成分的增加则会抑制液晶的形成。所制备的生物基 LCP 具有很高的热稳定性，玻璃化转变温度高达 80 ℃ 以上，分解温度高达 300 ℃ 左右。这项工作开发了两种可用的生物基单体来制备 LCP，显示出良好的可持续发展前景。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Reactive & Functional Polymers 工程技术-高分子科学

CiteScore

8.90

自引率

5.90%

发文量

259

审稿时长

27 days

期刊介绍： Reactive & Functional Polymers provides a forum to disseminate original ideas, concepts and developments in the science and technology of polymers with functional groups, which impart specific chemical reactivity or physical, chemical, structural, biological, and pharmacological functionality. The scope covers organic polymers, acting for instance as reagents, catalysts, templates, ion-exchangers, selective sorbents, chelating or antimicrobial agents, drug carriers, sensors, membranes, and hydrogels. This also includes reactive cross-linkable prepolymers and high-performance thermosetting polymers, natural or degradable polymers, conducting polymers, and porous polymers. Original research articles must contain thorough molecular and material characterization data on synthesis of the above polymers in combination with their applications. Applications include but are not limited to catalysis, water or effluent treatment, separations and recovery, electronics and information storage, energy conversion, encapsulation, or adhesion.