塑料科技2024，Vol.52Issue(6)：28-34,7.DOI:10.15925/j.cnki.issn1005-3360.2024.06.006
原料配比对水性聚氨酯耐水及力学性能影响的研究
Effect of Raw Material Ratio on Water Resistance and Mechanical Properties of Waterborne Polyurethane
摘要
Abstract
A series of waterborne polyurethane(WPU)products were prepared by prepolymer dispersion method using isophorone diisocyanate(IPDI),propylene oxide(PPG),trimethylolpropane(TMP),dihydromethylic acid(DMPA)etc.The effects of neutralization degree,isocyanate index(R value),amount of hydrophilic agent and crosslinking agent on water resistance and mechanical properties of WPU were studied.The results showed that the tensile strength and water absorption increased with the increase of neutralization degree.With the increase of R value,the tensile strength increased and water absorption decreased.The tensile strength and water absorption of the film increased with the increase of the dosage of hydrophilic agent.With the increase of the dosage of cross-linking agent,the tensile strength of the film first increased and then decreased,and the water absorption first decreased and then increased.The results of orthogonal test show that the order of factors affecting WPU film water absorption is:DMPA dosage>R value>TMP dosage>neutralization degree.When the neutralization degree is 80%,the dosage of TMP is 1%,the dosage of DMPA is 4%,and the R value is 1.10,the WPU film has the lowest water absorption(8.72%)and the best water resistance.The order of factors affecting film tensile strength is:DMPA dosage>TMP dosage>R value>neutralization degree.When the neutralization degree is 90%,the dosage of TMP is 3%,the dosage of DMPA is 5%,and the R value is 1.20,the tensile strength of WPU film is the highest(12.35 MPa).关键词
水性聚氨酯/原料配比/耐水性/力学性能/正交试验Key words
Waterborne polyurethane/Raw material ratio/Water resistance/Mechanical properties/Orthogonal test分类
化学化工引用本文复制引用
李青飞,唐丽丽..原料配比对水性聚氨酯耐水及力学性能影响的研究[J].塑料科技,2024,52(6):28-34,7.基金项目
广西高校中青年教师科研基础能力提升项目(2022KY0243) （2022KY0243）
