基于响应面法的聚乳酸开环聚合工艺的优化及其性能表征  

Optimization and Performance Characterization of the Ring-Opening Polymerization Process of Polylactic Acid Based on Response Surface Methodology

作　　者：王霞[1] 张虽栓[1] 王花丽[1] WANG Xia;ZHANG Sui-shuan;WANG Hua-li(Henan Quality Engineering Vocational College,Pingdingshan 467000,China)

机构地区：[1]河南质量工程职业学院,河南平顶山467000

出　　处：《塑料科技》2021年第4期71-74,共4页Plastics Science and Technology

摘　　要：以丙交酯为原料,采用响应面法中的中心组合设计(CCD)设计实验,以聚乳酸(PLA)分子量为响应值,分别考察了压强、反应温度、反应时间和催化剂用量4个因素及其交互作用对丙交酯开环后聚合形成PLA的分子量的影响,并建立响应值与影响因素之间的回归方程。残差正态概率图均匀分布在一条直线上,可信度为99.65%,说明响应曲面法建立的预测PLA分子量的模型可靠。在最佳工艺条件下分析所制得的产品,利用核磁共振氢谱(1HNMR)、傅里叶红外光谱(FIIR)对其结构进行表征,利用示差扫描量热法(DSC)和热重分析法(TG)对其热力学性能进行表征。结果表明,最终产品可获得与多步法生成的PLA相似的性能,节省工序,降低反应成本。In this paper,Central Composite Design(CCD),a kind of response surface methodology,was used to explore the effects of pressure,reaction temperature,reaction time,amount of catalyst on the molecular weight of polylactic acid(PLA)formed by ring-opening polymerization of lactide.Based on the regression analysis,regression equations related to response values and factors were established.The residual normal probability map was evenly distributed in a straight line,and the credibility was 99.65%,which showed that the established models were accurate and reliable for the analysis and prediction of the process.The PLA structure were characterized by nuclear magnetic and FIIR.DSC and TG was used to analysis thermodynamic properties of polymers.The results show that the final product can obtain similar performance to the PLA produced by the multi-step method,saving process steps and reducing reaction costs.

关 键 词：聚乳酸 整体优化 响应面法 化学结构 

分 类 号：TQ323.41[化学工程—合成树脂塑料工业]