[1]童永仲,潘绍武,朱美芳.氢键/二硫键协同的室温修复聚氨酯的制备及性能研究[J].中国材料进展,2024,43(07):020-29.
 TONG Yongzhong,PAN Shaowu,ZHU Meifang.Preparation of Room-Temperature Healable Polyurethanes based on Synergistic Hydrogen Bonds/Disulfide Bonds and Study on Their Properties[J].MATERIALS CHINA,2024,43(07):020-29.
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氢键/二硫键协同的室温修复聚氨酯的制备及性能研究()
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中国材料进展[ISSN:1674-3962/CN:61-1473/TG]

卷:
43
期数:
2024年第07期
页码:
020-29
栏目:
出版日期:
2024-07-30

文章信息/Info

Title:
Preparation of Room-Temperature Healable Polyurethanes based on Synergistic Hydrogen Bonds/Disulfide Bonds and Study on Their Properties
作者:
童永仲潘绍武朱美芳
东华大学材料科学与工程学院 纤维材料改性国家重点实验室,上海 201620
Author(s):
TONG YongzhongPAN ShaowuZHU Meifang
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,College of Material Science and Engineering,Donghua University,Shanghai 201620,China
关键词:
室温自修复聚氨酯硬段力学性能氢键二硫键
Keywords:
room-temperature self-healingpolyurethaneshard segmentsmechanical propertieshydrogen bondsdisulfide bonds
文献标志码:
A
摘要:
自修复材料作为一类新兴的智能材料,具有广泛的应用前景,然而此类材料难以兼具良好的力学性能与自修复能力。以聚四氢呋喃(PTMEG)为软段、异佛尔酮二异氰酸酯(IPDI)和双(4-羟苯基)二硫醚(4-HD)为扩链剂,通过两步扩链反应制备了室温自修复聚氨酯(PUHD),并分别研究了单体配比与扩链剂的分子结构对PUHD的力学与自修复性能的影响。结果表明:当R值(R=[IPDI]/[PTMEG])为1.5时,PUHD的综合性能最佳,拉伸强度、伸长率与韧性分别为7.53 MPa、1447.80%与31.98 MJ/m3。PUHD-1.5具有良好的流变性能,在25与60 ℃下的特征弛豫时间分别为23.45与7.10 min,在25 ℃下修复6 h,伸长率与拉伸强度的修复效率分别为95.29%和89.95%。扩链剂的分子结构对PUHD的自修复性能有显著影响,弱氢键作用与松散堆积的硬段有利于提高PUHD的自修复性能。
Abstract:
As a new kind of intelligent material,self-healing materials have a widespread application prospect.However,it is difficult to have both good mechanical properties and self-healing ability.Here,using polytetrahydrofuran(PTMEG)as soft segments,isophorone diisocyanate(IPDI)and bis(4-hydroxyphenyl)disulfide(4-HD)as chain extenders,a room-temperature self-healing polyurethane(PUHD)was prepared by two-step chain extension reaction.The effects of monomer ratio and molecular structures of chain extenders on the mechanical and self-healing properties of PUHD were studied.The results showed that PUHD had the best comprehensive performance when the R value(R=[IPDI]/[PTMEG])is 1.5.The tensile strength,elongation and toughness reached 7.53 MPa,1447.80% and 31.98 MJ/m3,respectively.PUHD-1.5 had good rheological properties with characteristic relaxation time of 23.45 min and 7.10 min at 25 and 60 ℃,respectively.The self-healing efficiency of elongation and tensile strength were 95.29% and 89.95% at 25 ℃ for 6 h,respectively.The molecular structures of chain extenders have a significant effect on the self-healing ability of PUHD.Weak interaction of hydrogen bonds and loosely-packed hard segments are beneficial to improve the self-healing properties of PUHD.
更新日期/Last Update: 2024-06-26