醇酸树脂改性聚丙烯酸酯耐磨涂层的研究  

Research of Alkyd Resin Modified Polyacrylate Abrasion Resistant Coating

作　　者：王懿 鲍艳[1] 刘一帆 刘超 付娆 WANG Yi;BAO Yan;LIU Yifan;LIU Chao;FU Rao(College of Bioresources Chemical and Materials Engineering,Shaanxi University of Science and Technology,Xi’an 710021,China;Shangluo Vocational and Technical College,Shangluo,Shaanxi 726000,China)

机构地区：[1]陕西科技大学轻工科学与工程学院,西安710021 [2]商洛职业技术学院,陕西商洛726000

出　　处：《涂料工业》2024年第12期10-16,共7页Paint & Coatings Industry

基　　金：国家自然科学基金面上项目(22078188)。

摘　　要：针对聚丙烯酸酯皮革涂层耐磨性能不佳的问题,以醇酸树脂预聚物为功能单体,利用醇酸树脂的刚性和多结合位点优势,对聚丙烯酸酯进行改性。采用纳米粒度及电位分析仪(DLS)、傅立叶变换红外光谱仪(FT-IR)、差示扫描量热仪(DSC)、凝胶渗透色谱仪(GPC)对醇酸树脂改性聚丙烯酸酯的乳液粒径、结构、玻璃化转变温度及相对分子质量进行表征;同时,对不同醇酸树脂用量下涂层的附着力、铅笔硬度、溶胀率、力学性能及耐磨性进行测试;此外,通过扫描电子显微镜(SEM)和超景深显微镜对其磨损形态进行了观察。结果表明:制备的醇酸树脂改性聚丙烯酸酯乳液的粒径约为106 nm,M_(w)为60994,M_(n)为12703。当醇酸树脂用量为15%时,涂层附着力为0级,铅笔硬度为4H,拉伸强度为5.58 MPa,断裂伸长率为411.09%,涂层耐磨性最佳,且明显优于纯聚丙烯酸酯涂层。醇酸树脂改性后,使其从线型结构转变成为网状结构,从而提升了聚丙烯酸酯皮革涂层的耐磨性能。Focused on the problem of poor abrasion resistant of polyacrylate leather coating,alkyd resin prepolymer was used as a functional monomer to modify polyacrylate,leveraging the rigidity and multiple binding sites of alkyd resin.The particle size,structure,Tg,and molecular weight of alkyd resin modified polyacrylate were characterized using DLS,FT-IR,DSC,and GPC,respectively.The performance of coatings with different alkyd resin dosage was tested,such as adhesion,pencil hardness,swelling rate,mechanical properties,and abrasion resistance.In addition,the wear patterns were observed by SEM and ultra depth of field microscopy.The results demonstrated successful preparation of alkyd resin modified polyacrylate latex with a particle size of approximately 106 nm,weight average molecular weight of 60994 and numerical mean molecular weight of 12703.Notably,when the dosage of alkyd resin was at 15%,the adhesion,pencil hardness,tensile strength,and elongation at break of alkyd resin modified polyacrylate coating was zero grade,4H,5.58 MPa and 411.09%,respectively,demonstrating optimal abrasion resistance,significantly superior to pure polyacrylate coatings.Overall,the alkyd resin modification transformed the linear structure into a mesh structure,thereby enhancing the abrasion resistance of the polyacrylate leather coating.

关 键 词：耐磨涂层 聚丙烯酸酯 醇酸树脂 皮革涂饰 网状结构 

分 类 号：TQ637.2[化学工程—精细化工]