密封胶用硅烷封端聚醚树脂的制备与性能研究  

Study on Preparation and Performance of Silane-terminated Polyether Resin for Sealant

作　　者：王思 尹君 孙丽丽 张群朝[1] 蒋涛[1] 施德安[1] 尤俊 郝同辉[1] WANG Si;Yin Jun;SUN Li-li;ZHANG Qun-chao;JIANG Tao;SHI De-an;YOU Jun;HAO Tong-hui(School of Materials Science and Engineering,Hubei University,Wuhan 430062,Hubei;TDK(Zhuhai FTZ)Co.,Ltd.,Zhuhai 519030,Guangdong)

机构地区：[1]湖北大学材料科学与工程学院,武汉430062 [2]东电化电子元器件有限公司,广东珠海519030

出　　处：《有机硅材料》2021年第1期24-29,共6页Silicone Material

基　　金：湖北省重大项目(2017AAA115)。

摘　　要：以3-异氰酸酯基丙基二甲氧基硅烷、聚丙二醇(PPG)、N-(β-氨乙基)-γ-氨丙基三甲氧基硅烷为主要原料,通过加成反应制备了不同异氰酸酯基与羟基的量之比(R值)的硅烷封端聚醚树脂。采用红外光谱和核磁共振氢谱表征了产物结构,并测试了其固化物性能。结果表明,随着R值的增大,硅烷封端聚醚树脂固化物的拉伸强度从0.29 MPa提高到0.63 MPa,邵尔A硬度从12度升至33度,拉断伸长率从476.3%降至127.2%,质量损失率为10%、30%时的温度下降,质量损失率为50%、80%和热分解结束时的温度上升,在去离子水中浸泡7 d后的吸水率由15.8%降至9.2%;该硅烷封端聚醚树脂具有较好的力学性能、热稳定性和耐水性,可用于密封胶领域。Using 3-isocyanatopropyl dimethoxysilane,polypropylene glycol(PPG),N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane as the main raw materials,silane-terminated polyether resins with different R values(molar ratio of isocyanate groups to hydroxyl groups)were prepared by polyaddition reaction.The structure of the product was characterized by infrared spectroscopy and hydrogen nuclear magnetic resonance spectroscopy,and the properties of the cured products were tested.The results show that with the increase of R value,the tensile strength of the cured silane-terminated polyether resin increases from 0.29 MPa to 0.63 MPa,the Shore A hardness increases from 12 to 33,and the elongation at break increases from 476.3%to 127.2%;the temperature drops when the mass loss rate is 10%and 30%,and the temperature rises when the mass loss rate is 50%,80%,and at the end of thermal decomposition.The water absorption rate after immersing in deionized water for 7 days is changed from 15.8%to 9.2%;the silane-terminated polyether resin has good mechanical properties,thermal stability and water resistance,and can be used in the field of sealants.

关 键 词：密封胶 硅烷封端聚醚 树脂 热稳定性 吸水率 

分 类 号：TQ264.17[化学工程—有机化工]