端异氰酸酯基聚氨酯预聚体的合成及其应用研究  

Study on Synthesis and Application of Polyurethane Prepolymer with Terminal Isocyanate Group

作　　者：孙迎迎[1] 刘喜军[1,2] 娄春华[1,2] 

机构地区：[1]齐齐哈尔大学材料科学与工程学院,黑龙江齐齐哈尔161006 [2]黑龙江教育厅复合改性材料重点实验室,黑龙江齐齐哈尔161006

出　　处：《广州化工》2016年第3期49-53,共5页GuangZhou Chemical Industry

基　　金：黑龙江省自然科学基金资助项目(No:EZ01343)

摘　　要：以甲苯二异氰酸酯(TDI)为改性剂,分别以聚乙二醇单甲醚(MPEG)、聚乙二醇(PEG)为基础物质,采用溶液聚合法分别合成了端异氰酸酯基聚乙二醇单甲醚(NCO-MPEG)、端异氰酸酯基聚氨酯预聚体(NCO-PUE)和乙醇封端的端异氰酸酯基聚氨酯预聚体(NCO-PUE-ET)。实验确定TDI与MPEG、PEG以及NCO-PUE乙醇封端的反应时间分别为1.5 h、3.0 h和1.5h,当反应物配比nTDI∶nPEG=1.05∶1时,聚合产物NCO-PUE的数均分子量达到3.55万;FTIR分析结果表明通过TDI与MPEG、PEG的加成反应将-NCO基团带到了聚氨酯预聚体分子链的末端,并且聚合产物NCO-MPEG被成功接枝到了聚二甲基硅氧烷(PDMS)弹性粒子表面;热重分析(TG)结果表明端异氰酸酯基聚氨酯预聚体的初始热分解温度均在350℃以上,完全能够满足下一步实验需要。Using toluene diisocyanate（ TDI） as modifier, polyethylene glycol（ PEG） and polyethylene glycol monomethyl ether（ MPEG） as basic material, polyethylene glycol monomethyl ether with terminal isocyanate group（ NCO-MPEG）,polyurethane prepolymer with terminal isocyanate group（ NCO-PUE）,ethanol blocking of polyurethane prepolymer with terminal isocyanate group（ NCO-PUE-ET） were prepared by solution polymerization method. Experiment determined that the reaction time of MPEG and TDI,PEG and TDI,ethanol blocked NCO-PUE were 1. 5 h,3 h,1. 5 h. When the reactant ratio nTDI∶nPEG= 1. 05 /1,NCO-PUE average molecular weight was about35000. FTIR analysis results showed that-NCO groups were introduced into the chain-end of polyurethane prepolymers by addition reaction of TDI and MPEG or PEG,and product NCO-MPEG successfully grafted onto polydimethylsiloxane（ PDMS） elastomeric particles surface; TG result showed that the initial thermal decomposition temperature of polyurethane prepolymer was above 350 ℃. It was able to meet the next experiment needs.

关 键 词：聚乙二醇 异氰酸酯 聚氨酯预聚体 聚二甲基硅氧烷 核壳复合粒子 

分 类 号：TQ328.3[化学工程—合成树脂塑料工业]