基于点击化学硅烷偶联剂改性水性聚氨酯的研究  

Study on Waterborne Polyurethane Modified with Silane Coupling Agent via Click Chemistry

作　　者：李兴建[1] 杨子江[1] 孙道兴[1] 张宜恒[1] 

机构地区：[1]青岛科技大学化学与分子工程学院,山东青岛266042

出　　处：《有机硅材料》2015年第3期168-174,共7页Silicone Material

基　　金：国家自然科学基金资助项目(21176128)(51172116);青岛市国际科技合作资助项目(ZR2010BL022)

摘　　要：以4,4'-二羟甲基-1,4-庚二炔功能单体为扩链剂,制备了端炔基功能化水性聚氨酯(WPU);基于铜催化的1,3-偶极环加成点击化学反应,用3-叠氮基丙基三乙氧基硅烷(APTES-N3)与WPU侧链的端炔基反应,制备了APTES-N3改性WPU。研究了APTES-N3接枝量对WPU膜的热稳定性、疏水性、硬度和乳胶粒形态的影响。结果表明,随着APTES-N3用量的增大,改性WPU膜的疏水性、热稳定性和硬度提高;当APTES-N3的质量分数从0增大到5%时,改性WPU膜的水接触角从61°增大到75°,铅笔硬度从H增大到4H,样品燃烧后的残余质量分数从0左右增加到4.7%。Alkyne functional waterborne polyurethane（ WPU） was synthesized via 4,4＇-bis（ hydroxymethyl）-1,4-heptadiyne functional monomer as a chain extender. Then WPU modified with silane coupling agent was prepared based on copper catalyzed 1,3-dipolar cycloaddition reaction between alkyne-functionalized WPU and 3-azide propyltriethoxysilane（ APTES-N3）. Influence of the grafting amount of APTES-N3 on the thermal stability,hydrophobicity,hardness of the modified WPU films and the emulsion particle morphology was studied. Results showed the thermal stability,hydrophobicity and hardness of the modified WPU were enhanced as the content of APTES-N3 residual mass fraction increased. When APTES-N3 content increased from0 to 5%,the water contact angle,pencil hardness and carbon residue of WPU films increased from 61° to75°,H to 4 H,and 0% to 4. 7%,respectively.

关 键 词：1 3-偶极环加成反应 水性聚氨酯 4 4'-二羟甲基-1 4-庚二炔 3-叠氮基丙基三乙氧基硅烷 硅烷偶联剂 铜 

分 类 号：TQ316.6[化学工程—高聚物工业]