MSU-J及有机化修饰对PMMA杂化材料力学性能和热性能的影响  

Effect of MSU-J and Organic Modification on Mechanical and Thermal Properties of PMMA Hybrid Material

作　　者：焦剑[1] 吴广力[1] 刘蓬[1] 蔡宇[1] 

机构地区：[1]西北工业大学理学院,西安710129

出　　处：《材料工程》2014年第2期18-23,共6页Journal of Materials Engineering

基　　金：西北工业大学研究生创业种子基金资助项目(Z2012152)

摘　　要：采用蠕虫状介孔SiO2(MSU-J)和γ-(甲基丙烯酰氧)丙基三甲氧基硅烷后嫁接法有机化修饰的MSU-J-G,与MMA原位聚合制备具有三维纳米网络结构的MSU-J/PMMA和MSU-J-G/PMMA杂化材料。研究了杂化材料的微观结构、力学性能和热性能。结果表明:杂化材料中MSU-J及MSU-J-G保持原有的蠕虫状介孔结构,且近90%孔道被PMMA填充。MSU-J或MSU-J-G质量分数为7%时,两类杂化材料的性能最优,相对于纯PMMA,其拉伸强度和模量分别提高了38.9%和40.2%(MSU-J)以及46.7%和39.5%(MSU-J-G),断裂伸长率及冲击强度略有下降。杂化材料的热分解温度(Td)及玻璃化转变温度(Tg)也得到了改善。相对于MSU-J,MSU-J-G在PMMA中分散更均匀,对于杂化材料的力学和热性能改善效果更佳。Mesoporous silica/poly（methyl methacrylate） （PMMA） hybrid material with three dimen- sional network nano-structure was prepared via in situ polymerization of MMA. In these hybrid mate- rial, two kinds of mesoporous silica with wormhole framework structure, MSU-J and MSU-J-G modi- fied by 7-（Methacryloyloxy） propyl trimethoxy silane （MAPTS） via post-grafting, were introduced as the inorganic filler. Morphologies, mechanical and thermal properties of these hybrid material were investigated. The results of the TEM and density of hybrid material show that the nano-porous channels of MSU-J and MSU-J-G are not destroyed in hybrid material, and about 90% channels are filled by PMMA. The mechanical properties of hybrid material exhibited optimum value when the mass fraction of MSU-J or MSU-J-G is 7%. The tensile strength and modulus are improved by 38. 9%, 40.2% （containing MSU-J） and 46.7%, 39.5M （containing MSU-J-G） compared with the matrix. In the same time, the elongation at break and impact strength decrease slightly. The thermal decomposition temperature （Td） and glass transmission temperature （Tg） of hybrid material are also improved respectively. Generally, the better dispersion of MSU-J-G in the matrix compared to MSU-J induced more improved mechanical and thermal properties of MSU-J-G/PMMA compared to MSU-J/PMMA hybrid material.

关 键 词：杂化材料 介孔 SIO2 PMMA 微观结构 性能 

分 类 号：TB383[一般工业技术—材料科学与工程] TB332