中文摘要：

以甲基丙烯酸（MAA）、丙烯腈（AN）、丙烯酰胺（AM）和甲基丙烯酸甲酯（MMA）为单体，用γ射线辐射引发聚合，形成MAA/AN/AM的共聚物和PMMA，然后使用热处理酰亚胺化制备了聚甲基丙烯酰亚胺（PMI），同时PMMA降解形成微孔结构。红外光谱分析表明：在选定温度条件下热处理过程中，相应基团酰亚胺化和PMMA降解成孔同时进行；TG．DSC分析结果表明，所得微孔材料的起始热分解温度达345E；扫描电镜观察发现，所得产物为闭孔结构的聚甲基丙烯酰亚胺微孔材料，孔径约为100gm。

英文摘要：

Methylacrylic acid （MAA）, acrylonitrile （AN）, acrylamide （AM） and methyl methacrylate （MMA） were polymerized by μ-rays, and AN/AM/MAA copolymer as well as polymethylmethacrylate （PMMA） were synthesized. Then microporous structure of polymethacrylimide （PMI） was obtained by the degradation of PMMA using heat-treatment. FIIR spectra showed that imide process and PMMA degradation were simultaneous at the selected temperature. TG-DSC analysis showed that the sample began to degrade at 345℃. And SEM photos indicated that microporous PMI with obturator foramen structure was obtained, whose aperture was about 100 μm.