Controllable Photo-degradability on Polyurethane from AB-Type Monomers

IF 5.1 1区化学 Q1 POLYMER SCIENCE Macromolecules Pub Date : 2025-02-14 DOI:10.1021/acs.macromol.4c03108

Johannes Reeb, Yibo Shen, Patrick Theato, Yosuke Akae

引用次数: 0

Abstract

A new photodegradable AB-type monomer (3-nitro,4-hydroxylmethyl benzoylazide) was developed for the synthesis of polyurethanes featuring a photodegradability, which could be finely controlled through copolymerization. Because of the o-nitrobenzyl alcohol framework on the monomer, the resulting polymer was decomposed by UV irradiation at 365 nm. Moreover, since the introduction of a nitro group on the AB-type monomer framework reduced the reactivity of the alcohol group and increased that of the isocyanate group, copolymerization with other monomers induced a certain preference of diad patterns, which would affect the photodegradability of polyurethanes. The results suggested the AB-type monomer protocol enables the synthesis of more precisely designed polyurethane structures than the conventional synthesis, i.e., by a polyaddition between diol and di-isocyanate.

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AB 型单体聚氨酯的可控光降解性

研究人员开发了一种新型光降解 AB 型单体（3-硝基、4-羟甲基苯甲酰肼），用于合成具有光降解性的聚氨酯，这种光降解性可以通过共聚来精细控制。由于单体上存在邻硝基苄醇框架，因此在 365 纳米波长的紫外线照射下，生成的聚合物会被分解。此外，由于在 AB 型单体框架上引入了硝基，降低了醇基的反应活性，提高了异氰酸酯基的反应活性，因此与其他单体共聚会诱发某种偏好的二元结构，从而影响聚氨酯的光降解性。研究结果表明，与传统的合成方法（即二元醇和二异氰酸酯之间的加成反应）相比，AB 型单体方案能够合成设计更精确的聚氨酯结构。

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来源期刊

Macromolecules 工程技术-高分子科学

CiteScore

9.30

自引率

16.40%

发文量

942

审稿时长

2 months

期刊介绍： Macromolecules publishes original, fundamental, and impactful research on all aspects of polymer science. Topics of interest include synthesis (e.g., controlled polymerizations, polymerization catalysis, post polymerization modification, new monomer structures and polymer architectures, and polymerization mechanisms/kinetics analysis); phase behavior, thermodynamics, dynamic, and ordering/disordering phenomena (e.g., self-assembly, gelation, crystallization, solution/melt/solid-state characteristics); structure and properties (e.g., mechanical and rheological properties, surface/interfacial characteristics, electronic and transport properties); new state of the art characterization (e.g., spectroscopy, scattering, microscopy, rheology), simulation (e.g., Monte Carlo, molecular dynamics, multi-scale/coarse-grained modeling), and theoretical methods. Renewable/sustainable polymers, polymer networks, responsive polymers, electro-, magneto- and opto-active macromolecules, inorganic polymers, charge-transporting polymers (ion-containing, semiconducting, and conducting), nanostructured polymers, and polymer composites are also of interest. Typical papers published in Macromolecules showcase important and innovative concepts, experimental methods/observations, and theoretical/computational approaches that demonstrate a fundamental advance in the understanding of polymers.