PLA-β-CD包合物对PLA性能的影响

发布时间：2018-03-24 23:07

本文选题：β-环糊精　切入点：聚乳酸　出处：《塑料》2017年05期

【摘要】：以β-环糊精(β-cyclodextrin,β-CD)与聚乳酸(poly(lactic acid),PLA)为原料,采用溶液共沉淀法制备了聚乳酸-β-环糊精包合物(PLA-IC)。通过红外光谱、X射线衍射和核磁共振分析了包合物的结构。结果表明,PLA与β-CD的包合摩尔比为1.26∶1,证明其为部分包合。以PLA-IC包合物为助剂,通过熔融共混法制备了PLA/PLA-IC复合材料,差示扫描量热(DSC)表明,包合物的结晶性比纯聚乳酸的结晶性能更好。热重分析表明,PLA复合材料的热降解温度提高。因此,PLA-IC具有成核剂的作用。
[Abstract]:尾 -cyclodextrin (尾 -CDA) and Poly (lactic acidactic acid) were used as raw materials, and 尾 -cyclodextrin (尾 -CDT) and Poly (lactic acidactic acid) (PLA) were used as raw materials. Polylactic acid-尾-cyclodextrin inclusion complex was prepared by solution coprecipitation method. The structure of the inclusion compound was analyzed by IR and NMR. The results show that the molar ratio of PLA to 尾-CD is 1.26: 1, which proves that the inclusion complex is partial inclusion. Using PLA-IC inclusion complexes as auxiliaries, PLA/PLA-IC composites were prepared by melt blending method, and the differential scanning calorimetry (DSC) showed that, The crystallinity of the inclusion compound is better than that of pure polylactic acid, and the thermogravimetric analysis shows that the thermal degradation temperature of PLA composite is higher. Therefore, PLA-IC has the effect of nucleating agent.
【作者单位】：新疆大学化学化工学院石油天然气精细化工自治区重点实验室;
【基金】：国家自然科学基金项目(51263019)
【分类号】：O633.14;TB332

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