【作者】 倪贵峰；

【导师】 倪才华；

【作者基本信息】 江南大学 ， 化工工艺， 2009， 硕士

【摘要】 采用γ-胺丙基三乙氧基硅烷（KH-550）为原料合成胺基倍半硅氧烷（POSS-NH₂）,并在此基础上与缩水甘油醚合成杂化物。POSS-NH₂/正丁基缩水甘油醚按化学摩尔比1:8、1:12、1:14、1:16进行反应合成DRT1类杂化物:DRT₁₁、DRT₁₂、DRT₁₃、DRT₁₄;POSS-NH₂/正丁基缩水甘油醚/1,4-丁二醇二缩水甘油醚按化学摩尔比1:9:3、1:10:2、1:11:1合成DRT2类杂化物DRT₂₁、DRT₂₂、DRT₂₃。利用红外、核磁、质谱对POSS-NH₂及其杂化物进行了表征。用所合成的杂化物添加到E-51环氧树脂中形成DRT/EP复合材料,杂化物的添加量分别为5wt%、10wt%、15wt%、20wt%。对改性后复合材料进行力学性能和热学性能测试,研究了POSS-NH₂顶点接枝链数量、接枝官能团及杂化物添加量对改性效果的影响。发现DRT₁₂具有较好的改性性能,在DRT₁₂含量为15wt%时,DRT₁₂/EP复合材料的冲击强度和断裂伸长率分别达到了7KJ/m2和6.6%。POSS-NH₂顶点上所接枝的官能团对复合材料性能也有显著影响,带有环氧基团的DRT2类杂化物比DRT1类杂化物具有更好的改性效果,在DRT₂₂含量为20wt%时,DRT₂₂/EP复合材料的冲击强度为8.1KJ/m2,其热学性能也有显著的提高。本文并通过SEM,XRD等对杂化物改性复合材料的作用机理进行了研究。更多还原

【Abstract】 The compound of cageocta（aminopropyl silsesquioxane）（POSS-NH₂） was prepared in higher yield by the hydrolysis and polycondensation of trifunctional monomer H₂NCH₂CH₂CH₂Si（OC₂H₅）₃, then some inorganic/organic hybrid nano material was prepared through the reaction of cage octa（aminopropyl silsesquioxane）（POSS-NH₂） with n-Butyl glycidyl ether（XY-501）and 1,4-Butanedioldiglycidylether.A series of polyhedral oligomeric silsesquioxane/epoxy nanocomposites （DRT/EP） containing 0 wt%, 5 wt%, 10 wt% and 15 wt% content of inorganic/organic hybrid nano material were prepared. Mechanical properties and thermal properties were used as the index to show the effect the amounts of chain and different functional group on inorganic/organic hybrid nano material.The result showed the DRT₁₂/EP has the good properties,its impact strength and elongation fracture measure up 7KJ/m² and 6.6% when DRT₁₂ content is 15wt%,however DRT₂₂/EP showed the better properties, its impact strength reachs 8.1 KJ/m2 when DRT₂₂ content is 20wt%.And the mechanism of the incorporation of oligomeric silsesquioxane/epoxy nano composites into epoxy networks enhancing the mechanical properties and thermal properties of epoxy was invested by scanning electron microscopy（SEM） and X-ray diffraction（XRD）.更多还原