纺织工程学报2025，Vol.3Issue(6)：19-28,10.
含螺吡喃的力致变色聚酯型聚氨酯的合成及性能调控研究
Preparation and properties regulation of mechanochromic polyurethane elastomers based on spiropyran
摘要
Abstract
Mechanochromic elastomers have shown a wide range of applications in flexible displays,intelligent medical monitoring,and material damage warning.However,it is still challenging to prepare a force-chromo-tropic elastomer with both high toughness and sensitive response to external forces.Polyurethane elastomers with hexamethylene diisocyanate(HDI)as the hard chain segment and polybutylene adipate-1,4-butanediol(PBA-1000)as the flexible chain segment containing spiropyran(SP)groups were successfully synthesized by solution polymerization,and the structure of the elastomers was analyzed by Liquid Chromatography-Mass Spectrometry(LC-MS),Fourier Transform Infrared Spectroscopy(FTIR),and Ultraviolet-Visible-Near Infrared Spectroscopy(UV-Vis),the properties of the materials were optimized by regulating the ratio of the flexible to the rigid chain segments.Gel Permeation Chromatography(GPC),Differential Scanning Calorimetry(DSC),Thermogravimetric Analyzer(TGA)and X-ray Diffractometer(XRD)were used to analyze the molecular weights,thermal properties as well as crystalline properties of the elastomers.The mechanical properties,resil-ience and mechanochromic sensitivity of polyurethane elastomers were further investigated using universal ten-sile test.The results show that the elastomer exhibits clear color change at different tensile strains with a residu-al strain of 70%after 10 cycles(preset strain of 150%).The critical strain for color change(εMC)of the elastomer was 129%.关键词
热塑性弹性体/力致变色/螺吡喃/聚氨酯/智能材料Key words
thermoplastic elastomers/mechanochromic/spiropyran/polyurethane/smart materials分类
化学化工引用本文复制引用
OU Shuangming,ZHAN Huihui,CHENG Weijie,LIU Feixia,CHENG Miao,WANG Wenwen..含螺吡喃的力致变色聚酯型聚氨酯的合成及性能调控研究[J].纺织工程学报,2025,3(6):19-28,10.基金项目
国家自然科学基金资助项目(52373063). （52373063）
