CAJ | 학술논문

以乙醇酸甲酯为原料,先通过熔融缩聚法得到低聚物,然后进行固相缩聚法制备出高分子量的聚乙醇酸甲酯（PMG）。考察了工艺过程中催化剂的种类和用量、反应温度以及反应时间对PMG分子量的影响。并通过正交试验得到较优的合成条件为：催化剂二水合氯化亚锡的质量分数为0.5%,压力70 Pa,反应温度180℃,反应时间100 h,合成的PMG的特性黏度可达0.802 dL/g。采用傅里叶红外光谱（FT-IR）表征了PMG基团的特征吸收峰,差示扫描量热仪（DSC）表征了PMG的玻璃化温度、结晶温度和熔点。
이을순산갑지위원료,선통과용융축취법득도저취물,연후진행고상축취법제비출고분자량적취을순산갑지（PMG）。고찰료공예과정중최화제적충류화용량、반응온도이급반응시간대PMG분자량적영향。병통과정교시험득도교우적합성조건위：최화제이수합록화아석적질량분수위0.5%,압력70 Pa,반응온도180℃,반응시간100 h,합성적PMG적특성점도가체0.802 dL/g。채용부리협홍외광보（FT-IR）표정료PMG기단적특정흡수봉,차시소묘량열의（DSC）표정료PMG적파리화온도、결정온도화용점。
Polymethyl glycolate(PMG) with high molecular weight was synthesized via melt/solid polycondensation with methyl glycolate as the starting material.By an orthogonal test,different catalysts,the amount of catalyst,reaction temperature,time and other factors were examined in the polymerization,and the optimal condition of the melt/solid polycondensation synthesis of high molecular weight ploymethyl glycolate was obtained as follows:reaction temperature 180℃,0.5% tin(Ⅱ) chloride dihydrate,70 Pa,reaction time 100h.The intrinsic viscosity of PMG can reach 0.802 dL/g.The typical absorption peaks of PMG in Fourier transform infrared(FT-IR) spectra were measured,and the glass transition temperature,crystallization temperature and melting point were determined by differential scanning calorimetry(DSC).