Main-chain hybrid azobenzene-1,2,3-triazoleoligo(dimethylsiloxane) liquid-crystalline photoactive copolymers

IF 4.5 3区工程技术 Q1 CHEMISTRY, APPLIED

Reactive & Functional Polymers Pub Date : 2025-03-08 DOI:10.1016/j.reactfunctpolym.2025.106256

Dmitry Migulin , Kseniya Bezlepkina , Mikhail Buzin , Artem Bakirov

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Abstract

The development of well-designed anisotropically ordered photoactive liquid-crystalline polymers has potential in the development of a number of areas related to high-tech light-responsive materials and devices, including photonics, optical switching, image storage, soft actuators, etc.

The synthesis and characterization of a new type of photoactive linear main chain liquid-crystalline hybrid copolymers with regularly alternating molecular architectures is achieved for the first time through the use of azide-alkyne cycloaddition chemical reactions between a series of alkyne-terminated azobenzene molecules and azide-functional oligo(dimethylsiloxane) telechelics.

The present investigation encompasses an array of chemical structures and molecular morphologies, thermodynamic properties, thermotropic liquid-crystalline and photoisomerization behaviors, and the influence of the azo-copolymer molecular composition on the polymers' microstructure, morphologies, and propensity towards thermotropic self-assembly into lamellar spherulitic structures.

The kinetics of non-degradative reversible E-Z photoisomerization transitions and the relationship between the molecular composition of the polymers and their photoinduced isomerization behavior were investigated.

The morphology and degree of anisotropy of physically cross-linked LCPs fibers prepared by the simple melt spinning method were studied.

The results obtained provide important insights into the structure-property relationship of photoactive main chain hybrid azobenzene-siloxane LCPs, which are useful for the design of novel advanced photoactive polymers.

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主链混合偶氮苯-1,2,3-三唑啉基（二甲基硅氧烷）液晶光活性共聚物

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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.