【摘要】 采用对比实验、正交试验以及盐稀释剂量的选择确定最优合成工艺条件,对所制备的D,L-丙交酯再进行定性和定量分析。得出盐稀释剂是影响D,L-丙交酯产率最显著的因素,当用量为4%—6%时,其收率由25.65%提高到约40.00%,磷酸盐的残留量仅为0.012%,D,L-丙交酯的纯度可达99.40%以上。磷酸盐稀释剂能够显著提高D,L丙交酯的收率,不影响结构和纯度,所制得的D,L丙交酯能够满足合成聚合物和共聚物的要求。更多还原

【Abstract】 To discuss the effect about yield of synthetic D,L-lactide with potassium dihyrogen phosphate(PDP) diluents.The optimization process of synthetic D,L-lactide was selected by contrast experiments,optimization experiments and selective experiments of PD Pdiluents quantity,then D,L-lactide produced was analyzed by qualitative analysis and quantitative analysis.The yield of D,L-lactide was improved from 25.65% to about 40.00% when PD Pdiluents that was the most effective factor to affect yield was used from 4%to 6%,however,the rudimental PD Pcontent was only 0.012% and the content of D,L-lactide was above 99.40%.The yield of D,L-lactide was improved effectively with PD Pdiluents,and the D,L-lactide,which structure wasnot changed,could be polymerized into PLA and other polymers for enough content.更多还原