关于合成不饱和聚酯(M-511)的相关研究与探索

The research and exploration of the unsaturated polyester(M-511)'s synthesis condition

以苯酐、顺酐、二丙二醇、丙二醇为主要原料,通过一步合成法得到不饱和聚酯,并以凝胶渗透色谱法(GPC)测量产品分子量和分子量分布。经探索发现本实验在醇过量10.9%、酸值为23.78~29.18 mg KOH/g、椎板粘度控制在10.25~15.50 Pa.s、反应时间32±2 h、反应温度204.5±0.5℃的条件下,可获得分子量分布较窄(分子量分布为1.17~1.18)的不饱和聚酯(分子量为4 000~4 500),为获得窄分子量分布的不饱和聚酯产品的合成条件的选择提供实践依据。

It is synthesized the unsaturated polyester with phthalic anhydride, maleic anhydride, bi-propylene glycol, propylene glycol as main raw materials by one-step method. By gel permeation chromatography(GPC), the product molecular weight and molecular weight distribution is measured. It is found that when the experiment condition is setted in alcohol excess 10.9%, acid value 23.78~29.18 mg KOH/g, laminar viscosity 10.25~15.50 Pa.s, reaction time 32±2 h, reaction temperature 204.5±0.5℃, narrow molecular weight distribution(MWD=1.17~1.18)unsaturated polyester(Mn=4000~4500) will be obtained, which provides the practice theory to obtain a narrow molecular weight distribution of unsaturated polyester product.