HEMA/SiO2杂化低聚物的制备及热性能研究  

Study on the Preparation and Thermal Properties of HEMA/SiO2 Hybrid Oligomers

作　　者：王刚[1,2,3] 刘晓辉[2,3] 米长虹[2] 王洁莹[2] 李欣[2,3] 赵颖[2,3] 张大勇[2,3] 朱金华[2,3] 荣立平[2,3] 白雪峰 WANG Gang;LIU Xiao-hui;MI Chang-hong;WANG Jie-ying;Li Xin;ZHAO Ying;ZHANG Da-yong;ZHU Jin-hua;RONG Li-ping;BAI Xue-feng(College of Materials Science and Chemical Engineering,Harbin Engineering University,Harbin 150001,China;Institute of Petrochemistry,Heilongjiang Academy of Sciences,Harbin 150040,China;Institute of A dvanced Technology,Heilongjiang Academy of Sciences,Harbin 150020,China)

机构地区：[1]哈尔滨工程大学材料科学与化学工程学院,黑龙江哈尔滨150001 [2]黑龙江省科学院石油化学研究院,黑龙江哈尔滨150040 [3]黑龙江省科学院高技术研究院,黑龙江哈尔滨150020

出　　处：《化学与粘合》2019年第4期248-252,299,共6页Chemistry and Adhesion

摘　　要：分别采用接枝法和共混法,通过原位水解-缩聚反应制备了甲基丙烯酸羟乙酯(HEMA)/二氧化硅(SiO2)杂化低聚物.采用红外光谱(FT-IR)和氢谱核磁(1H-NMR)表征了杂化低聚物的结构;采用透射电镜(TEM)和扫描电镜(SEM)观察了低聚物及其固化物的微观形貌;采用热重分析(TGA)和动态力学分析(DMA)研究了杂化单体固化物的热稳定性和玻璃化转变性能.结果表明:SiO2纳米粒子可均匀地分散于接枝法杂化HEMA中,而在共混法杂化HEMA中,SiO2粒子产生团聚.两种杂化工艺均提高了HEMA固化物的耐热分解稳定性,并降低了玻璃化转变温度(Tg).接枝法杂化降低了HEMA固化物在玻璃态下的储能模量(E'),提高了橡胶态下的E',共混法杂化使HEMA固化物在不同温度下的E'升高.The HEMA/SiOi hybrid oligomers are prepared by in-situ hydrolysis-condensation reaction which uses grafting method and blending method respectively. The chemical structure of the oligomers is characterized by FT-IR and 'H-NMR. The micromorphology of the oligomers and its cured products are observed by TEM and SEM. The thermal stability and glass transition of the cured hybrid oligomers are studied by TGA and DMA. The results show that the SiO2 nano-particles can evenly disperse in the grafting hybrid HEMA, by contrast, the particles are agglomerated in blending hybrid HEMA. The resistance to thermal decomposition of HEMA can be improved by hybridization through either grafting method or blending method, and the Tg reduces. Additionally, the grafting hybridization has made the storage modulus (E') of the hybrid HEMA decrease in glassy state, but increase in rubber state. However, the blending hybridization makes the E* of HEMA cured product increase at different temperature.

关 键 词：杂化 原位水解-缩聚反应 接枝 共混 热性能 

分 类 号：TQ433.436[化学工程]