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Preparation of Yellowing-Resistant Waterborne Polyurethane Modified with Disulfide Bonds

文献类型：期刊论文

作者Li, Guorong4,5; Duan, Baorong4; Leng, Guorui3; Liu, Junjie2; Zhang, Tong4; Lu, Zhenwei4; Wang, Shanshan5; Qu, Jiale1,5
刊名MOLECULES
出版日期2024-05-01
卷号29期号:9页码:21
关键词disulfide waterborne polyurethane yellowing resistance UV absorber UV-320 dynamic reversibility
DOI10.3390/molecules29092099
通讯作者Wang, Shanshan(wshanshan@bzmc.edu.cn) ; Qu, Jiale(qujiale@buaa.edu.cn)
英文摘要Waterborne polyurethane, renowned for its lightweight properties, excellent insulation capabilities, and corrosion resistance, has found extensive application in fields such as construction, automotive, leather, and thermal insulation. Nevertheless, during operational usage, waterborne polyurethane materials, akin to other polymeric substances, are susceptible to oxidative aging manifestations like yellowing, cracking, and diminished mechanical performance, significantly curtailing their utility. Consequently, the synthesis of yellowing-resistant polyurethane assumes pivotal significance. This study integrates dynamic reversible reactions into the synthesis process of polyurethane by introducing the dynamic reversible compound 2-hydroxyethyl disulfide as a chain extender, alongside the incorporation of a UV absorber to enhance the polyurethane's resistance to yellowing. When the disulfide bonds absorb heat, they undergo cleavage, yielding thiols that spontaneously recombine into disulfide bonds at ambient temperatures, allowing for the continuous breaking and reformation of disulfide bonds to absorb heat. Concurrently, in collaboration with the UV absorber, the detrimental effects of ultraviolet radiation on the polyurethane material are mitigated, thereby augmenting its resistance to yellowing. This study scrutinizes the positioning of UV absorber addition, the quantity of UV absorber, and the molar ratio of 1,4-butanediol to 2-hydroxyethyl disulfide, characterizing the functional groups of polyurethane through infrared and Raman spectroscopy. It is observed that the successful preparation of yellowing-resistant polyurethane is achieved, and evaluations on the modified polyurethane through color difference, tensile, and centrifugal tests reveal that the optimal yellowing resistance is attained by adding a UV absorber at a mass fraction of 1% to 3% prior to chain extension, resulting in a color change grade of 2, denoting slight discoloration. Simultaneously, the other properties of polyurethane exhibit relative stability. Notably, when the molar ratio of 1,4-butanediol to 2-hydroxyethyl disulfide is 3:2, the overall performance of the polyurethane remains stable, with exceptional yellowing resistance capabilities attaining a color change grade of 2.
WOS关键词EPOXY-ACRYLATE ; UV
WOS研究方向Biochemistry & Molecular Biology ; Chemistry
语种英语
WOS记录号WOS:001219972200001
资助机构The Scientific Research Foundation of Binzhou Medical University
源URL[http://ir.yic.ac.cn/handle/133337/36205]  
专题烟台海岸带研究所_中科院海岸带环境过程与生态修复重点实验室
烟台海岸带研究所_近岸生态与环境实验室
通讯作者Wang, Shanshan; Qu, Jiale
作者单位1.Chinese Acad Sci, Key Lab Coastal Environm Proc & Ecol Remediat, Yantai Inst Coastal Zone Res, Yantai 264003, Peoples R China
2.Binzhou Med Univ, Dept Phys, Yantai 264003, Peoples R China
3.Binzhou Med Univ, Sch Special Educ & Rehabil, Yantai 264003, Peoples R China
4.Yantai Univ, Coll Chem & Chem Engn, Res Ctr Leather & Prot, Yantai 264005, Peoples R China
5.Binzhou Med Univ, Sch Pharm, Yantai 264003, Peoples R China
推荐引用方式
GB/T 7714		 Li, Guorong,Duan, Baorong,Leng, Guorui,et al. Preparation of Yellowing-Resistant Waterborne Polyurethane Modified with Disulfide Bonds[J]. MOLECULES,2024,29(9):21.
APA Li, Guorong.,Duan, Baorong.,Leng, Guorui.,Liu, Junjie.,Zhang, Tong.,...&Qu, Jiale.(2024).Preparation of Yellowing-Resistant Waterborne Polyurethane Modified with Disulfide Bonds.MOLECULES,29(9),21.
MLA Li, Guorong,et al."Preparation of Yellowing-Resistant Waterborne Polyurethane Modified with Disulfide Bonds".MOLECULES 29.9(2024):21.

入库方式： OAI收割

来源：烟台海岸带研究所

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