三羟甲基丙烷改性水性聚氨酯的制备及影响因素  

Preparation and influencing factors of waterborne polyurethane modified with trimethylolpropane

作　　者：黄继涛[1] 钟金鑫 何阳 黄云安 崔春娜[1] HUANG Ji-tao;ZHONG Jin-xin;HE Yang;HUANG Yun-an;CUI Chun-na(College of New Energy and Materials,Ningde Normal University,Ningde,Fujian 352100,China;Fujian Institute of Product Quality Inspection,Fuzhou,Fujian 350000,China;Shouning County Xiadang Township Government,Ningde,Fujian 355514,China)

机构地区：[1]宁德师范学院新能源与材料学院,福建宁德352100 [2]福建省产品质量检验研究院塑胶与化工产品检验所,福建福州350000 [3]寿宁县下党乡人民政府,福建宁德355514

出　　处：《宁德师范学院学报（自然科学版）》2024年第3期235-241,共7页Journal of Ningde Normal University(Natural Science)

基　　金：福建省科技厅引导性项目(2023Y0038);宁德师范学院中青年项目(2020Q104);福建省教育厅中青年项目(JAT200680);宁德师范学院科技特派员资助专项(2022ZX404)。

摘　　要：三羟甲基丙烷(TMP)化学结构中有三个羟基,在水性聚氨酯的制备中起交联作用,可提高水性聚氨酯的耐水性、耐热性和力学性能.分别讨论异氰酸酯基和羟基的物质的量比(R值)、异氰酸酯的种类以及低分子多元醇对水性聚氨酯的性能影响;然后通过优化水性聚氨酯的合成工艺,并调控TMP的加入量,探究TMP对其性能的影响.结果表明,当使用聚碳酸酯二醇(PCDL)和四氢呋喃均聚醚(PTMEG)(物质的量比为1∶1)为软段,异佛尔酮二异氰酸酯(IPDI)为硬段,TMP质量分数为0.50%时,乳液稳定,耐水率为2.01%,拉伸强度为20MPa,断裂伸长率为108%.Trimethylolpropane(TMP)which contains three hydroxyl groups,plays a crosslinking role in the preparation of waterborne polyurethane,and can improve its water resistance,heat resistance,and mechanical properties.The effects of molar ratio of isocyanate group and hydroxyl group(R value),types of isocyanates,and low molecular weight polyols on the properties of waterborne polyurethane were discussed respectively,and then the effects of TMP on the performance of waterborne polyurethanes were investigated by optimisng the synthesis process of waterborne polyurethane and adjusting the amount of TMP added.The results show that when using polycarbonate diol(PCDL)and tetrahydrofuran copolymer ether(PTMEG)(molar ratio is 1∶1)for the soft segment,and isophorone diisocyanate(IPDI)for hard segment,and adding 0.5%TMP,the emulsion is stable with a water resistance rate of 2.01%,the tensile strength is 20 MPa,and elongation at break is 108%.

关 键 词：水性聚氨酯 三羟甲基丙烷 交联改性 性能研究 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]