超支化聚氨酯阻尼涂层的制备及性能  

Synthesis and Properties of Damping Coating Based on Hyperbranched Polyurethane

作　　者：郝名扬[1] 梁红波[1] 管静[1] 陈雅铭[1] 熊磊[1] 钟卫[1] 

机构地区：[1]南昌航空大学无损检测技术教育部重点实验室,高分子材料与工程系,南昌330063

出　　处：《高等学校化学学报》2009年第1期215-220,共6页Chemical Journal of Chinese Universities

基　　金：江西省教育厅科技计划项目(批准号:赣教技字[2007]165号);江西省教育厅腐蚀与防护重点实验室支持项目;南昌航空大学科研项目资助

摘　　要：以甲苯-2,4-二异氰酸酯(TDI)和二乙醇胺(DEOA)为原料,采用一步法合成了超支化聚氨酯,并对其改性制备了光固化超支化聚氨酯(UV-HPU)和超支化杂化聚氨酯(HHPU)两种树脂.用傅里叶红外光谱(FTIR)和核磁共振氢谱(1H NMR)表征了预期产物.以其为预聚物制备阻尼涂层,动态力学分析(DMA)研究表明,这两种涂层都具有高阻尼因子(tanδ≥1.0)、宽阻尼温度范围(tanδ≥0.5,大于50℃)和宽阻尼频率范围(20～160Hz);通过基本性能测试和热重分析(TGA)发现杂化涂层聚氨酯较光固化聚氨酯具有更好的机械性能和热稳定性能;杂化涂层聚氨酯的FTIR分析可知杂化涂层中硅氧烷水解缩合,提高了交联密度;杂化材料的断面扫描电镜(SEM)分析表明,硅氧烷的水解缩合并未形成大颗粒纳米粒子而是形成均相体系.Hyperbranched polyurethane（HPU） was synthesized from toluene-2,4-diisocyanate （TDI） and diethanolamine（DEOA） by one-step method, which was further modified to prepare UV-curable hyperbranched polyurethane（UV-HPU） and hyperbranched hybrid polyurethane（HHPU）. The resins were characterized by Fourior-transformed infrared spectroscopy（F-FIR） and ^1H nuclear magnetic resonance（ ^1H NMR）. The results indicate the successful synthesis of the production. Then the resins were used as oligomers to prepare damping coatings. Dynamic mechanical analysis（DMA） results show that the two cured resins of UV-HPU and HHPU have a high loss tangent （ tanδ≥ 1.0 ）, wide ranges of temperature （ tanδ≥ 0.5,50 ℃ ） and wide ranges of frequency （20-160 Hz）. Thermal gravimetric analysis（TGA） results indicate that HHPU coatings have a higher thermal stability than UV-HPU coatings. The FTIR of the hybrid coatings indicate the hydrolysis and condensation of trimethoxysilane. The Scanning electron microscopy（SEM） photographs of fracture surface of the hybrid material show that the hybrid material presents homogeneous system without obvious inorganic particle forming.

关 键 词：超支化聚氨酯 阻尼涂层 水解缩合 

分 类 号：O631[理学—高分子化学]