广东工业大学学报2024，Vol.41Issue(3)：54-61,8.DOI:10.12052/gdutxb.230053
预聚体对无溶剂聚氨酯胶黏剂耐蒸煮性能的影响
Effects of Prepolymer on the Cooking-resistant Properties of Solvent-free Polyurethane Adhesives
摘要
Abstract
A series of polyurethane prepolymers were designed and synthesized as isocyanate-terminated component for the final product:two-component solvent-free polyurethane adhesives.Structural characterization using infrared and 1H NMR spectroscopies confirmed the structure of the designed prepolymers.The effect of the isocyanate mass fraction(ωNCO)of the prepolymer,molecular weight of polyols and ratio R(molar ratio of-OH to-NCO in adhesives)on viscosity and cooking resistance of the polyurethane adhesives were investigated by a variable-control method.The results show that in the case ofωNCO=17%,the prepolymer has a low viscosity,and the prepared adhesive has a higher peel force after boiling treatment.For a constant value ofωNCO,as the molecular weight of the polyol decreases,the viscosity of the prepolymer increases,so does the peel force of the polyurethane adhesive before and after boiling.With polyols molecular weight of 1609 g/mol,ωNCO of 17%and Rof 2.5,the peel force of retort cast polypropylene(RCPP)layer before and after boiling is as high as 6.30 N and 4.37 N,respectively.A series of polyurethane adhesives were prepared by mixing this prepolymer with different B components,meeting the requirements in standard GB/T41168-2021 for cooking resistance requirements of aluminum plastic composite film.关键词
胶黏剂/聚氨酯预聚体/异氰酸酯/分子量/剥离力Key words
adhesive/polyurethane prepolymer/isocyanate/molecular weight/peel force分类
化学化工引用本文复制引用
姚家昌,陈志国,岳航勃..预聚体对无溶剂聚氨酯胶黏剂耐蒸煮性能的影响[J].广东工业大学学报,2024,41(3):54-61,8.基金项目
广东省自然科学基金资助项目(2022A 1515011500) （2022A 1515011500）
校企横向项目(22HK0258) （22HK0258）
