聚琥珀酰亚胺的合成及特性黏数的测定

Synthesis of Polysuccinimide and Determination of the Intrinsic Viscosity

以马来酸酐为原料,合成了高分子量的聚琥珀酰亚胺。通过傅立叶变换红外光谱表征,表明分子中具有五元环酰亚胺结构,推断了反应机理。经热失重-差热分析,可知聚琥珀酰亚胺分解温度在387℃。用极限黏度法测定了聚琥珀酰亚胺分子量(因聚琥珀酰亚胺对毛细管壁的吸附,用常规测试处理的方法难以得到)。文中分别对流出时间t及溶液密度ρ进行校正,得到较好的测试结果,测得分子量为11110,比文献报道的高。

Polysuccinimide of high molecular weight was gained,based on maleic anhydride as the raw material.The structure of polysuccinimide was characterized by Fourier transform infrared spectrum（FT-IR）,which showed that the characteristic imide peaks of five members ring.According to the FT-IR image,the reaction mechanism was inferred.The decomposition temperature of polysuccinimide was 387 ℃ from thermogravimetry-differential scanning analysis.The molecular weight of polysuccinimide was determined by viscosity limit law.It was difficult to gain the molecular weight through conventional method due to the adsorption of polymer to the capillary inwall.It came a much better result through flow time（t）and solution density（ρ）.Then the molecular weight of polysuccinimide was measured of 11,110,it was much higher than the reported in the literature.