Broken Chain Self-Reconnection Strategy Enables Radiation Ultraresistance of Polyurethane

IF 5.1 1区化学 Q1 POLYMER SCIENCE

Macromolecules Pub Date : 2024-11-29 DOI:10.1021/acs.macromol.4c02557

Jiading Wang, Shaoyun Guo, Xianlong Zhang

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引用次数: 0

Abstract

High-energy radiation could accelerate the deterioration of polymer properties, greatly increase the risk of equipment failure, and reduce the polymer’s service life. Inhibition of macromolecular chemical changes in polymers is the core design concept for conventional radiation resistance. Herein, we report a novel strategy that turns the radiation reaction into a repair effect for the self-reconnection of broken chains, thereby improving the radiation resistance of polyurethane (PU) concretely; the polybutadiene (PB) segments are evenly introduced into the PU with poly(propylene glycol) (PG) to prepare the PU containing PB and PG segments (PBG-PU). During irradiation, the radical addition coupling reactions of PB segments in PBG-PU allow the broken molecular chain of PBG-PU to be reconnected, thus continually repairing the radiation damage on PBG-PU. Therefore, the PBG-PU elastomers still maintain about 70% strength with minimal alterations in creep properties and recovery rates after 300 KGy radiation, while the ordinary PU elastomers have completely lost their original properties. The combination of the self-reconnection strategy and the modification method of the hard segment can even boost radiation resistance of PU to more than three times, showing excellent radiation stability. The self-reconnection strategy can also be used to increase the stability of the ultrastructure in material during high-dose gamma ray irradiation, showing great adjustability. This novel strategy demonstrates enormous potential in achieving the long-term application of polymers in nuclear industry, space mission, and radiation medicine fields.

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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.