无溶剂自乳化水性聚氨酯丙烯酸酯乳液的制备和胶膜性能

打开文本图片集

中图分类号：TQ323.8 文献标志码：A DOI：10.3969/j.issn.1003-9015.2025.02.016

Abstract：Waterborne polyurethane isan important polymer.In this study，acrylate monomer was usedas the solvent to reduce the viscosity of polyurethane prepolymer，which was chain-expanded，neutralized，emulsified with water，and then polymerized withacrylate monomers.The mechanical properties ofthe film were investigated after thecomposite emulsion was prepared，the ratioof acrylate to polyurethane and the efects of diffrent acrylate on the mechanical propertiesofthefilm were investigated.Theresultsshow thatthemechanical propertiesof thefilm prepared by this method are excellent.The tensile strength of the filmis45.17 MPa，theelongation at break is 400.6% ，and the Young's modulus is 332.70 MPa.

Key words： polymer ; waterborne polyurethane; solvent-free；acrylic ester；mechanical property

1前言

聚氨酯一般由软链段多元醇与硬链段异氰酸酯组成，是一种高性能聚合物，目前被广泛应用于建筑[1-3]、纺织[45]、粘结剂[6]、医学[7-8]等领域。（剩余12015字）