自愈合聚氨酯材料的制备与性能研究
摘 要
高分子材料可持续发展的当务之急是提高材料自修复能力，进而延长材料使用寿命。而自修复可分为外援型自修复和本征型自修复，因外援型自修复的显著缺点，现在主要研究本征自修复。本征型自修复又可分为可逆非共价键自修复（基于氢键作用的自修复、基于金属配体的自修复）和可逆共价键自修复。本文着重介绍可逆共价键自修复中的基于双硫键自修复和基于Diels-Alder可逆反应的自修复的制备原理和自愈过程。根据双硫键自修复机理利用聚对苯二甲酸酯碳酸酯（PPC）和4,4#39;-二环乙基甲烷二异氰酸酯（HMDI）在扩链剂等作用下合成自愈性聚氨酯材料弹性体。并且对用具体的数据对合成物的修复效果进行表征。最后利用傅里叶红外光谱对合成物进行结构鉴定。
关键词：聚氨酯材料；自愈性；红外光谱；双硫键；可逆DA反应
Preparation and properties of self - healing polyurethane materials
ABSTRACT
The most urgent task for the sustainable development of polymer materials is to improve the self-repairing ability of the materials so as to extend the service life of the materials.However, self-repair can be divided into foreign-aid self-repair and intrinsic self-repair. Due to the significant shortcomings of foreign-aid self-repair, the present study mainly focuses on intrinsic self-repair.Intrinsic self-repair can be divided into reversible non-covalent self-repair (self-repair based on hydrogen bonding, self-repair based on metal ligand) and reversible covalent self-repair.This paper mainly introduces the preparation principle and self-healing process of reversible covalent bond self-repair based on disulfide bond and Diels-Alder reversible reaction.According to the self-repairing mechanism of disulfide bond, polyurethane elastomer was synthesized by polyterephthalate carbonate (PPC) and 4,4#39; -dicycloethyl methane diisocyanate (HMDI) under the action of chain extender.And the repair effect of the compound was characterized by specific data.Finally, the structure of the compound was identified by Fourier transform infrared spectroscopy.
Key words：Polyurethane materials；Self-healing；Infrared spectrum；The double sulfur bonds； Reversible DA reaction
目 录
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