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    温广文, 夏浙安, 陈建定. PCL-PEG-PCL/PLA共混材料的制备与性能分析[J]. 华东理工大学学报（自然科学版）, 2017, (4): 487-494. DOI: 10.14135/j.cnki.1006-3080.2017.04.006
    引用本文: 温广文, 夏浙安, 陈建定. PCL-PEG-PCL/PLA共混材料的制备与性能分析[J]. 华东理工大学学报（自然科学版）, 2017, (4): 487-494. DOI: 10.14135/j.cnki.1006-3080.2017.04.006
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    WEN Guang-wen, XIA Zhe-an, CHEN Jian-ding. Preparation and Property Analysis of Poly(ε-caprolactone)-Poly(ethylene glycol)-Poly(ε-caprolactone)/Polylactide Blends[J]. Journal of East China University of Science and Technology, 2017, (4): 487-494. DOI: 10.14135/j.cnki.1006-3080.2017.04.006
    Citation: WEN Guang-wen, XIA Zhe-an, CHEN Jian-ding. Preparation and Property Analysis of Poly(ε-caprolactone)-Poly(ethylene glycol)-Poly(ε-caprolactone)/Polylactide Blends[J]. Journal of East China University of Science and Technology, 2017, (4): 487-494. DOI: 10.14135/j.cnki.1006-3080.2017.04.006
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    PCL-PEG-PCL/PLA共混材料的制备与性能分析

    Preparation and Property Analysis of Poly(ε-caprolactone)-Poly(ethylene glycol)-Poly(ε-caprolactone)/Polylactide Blends

      摘要
    • 摘要: 为了拓宽聚乳酸（PLA）在生物医学领域的应用，使用少量钛酸异丙酯改性相对分子质量为2 000的聚乙二醇（PEG-2000）引发己内酯开环聚合得到相对分子质量为6 000的生物可降解三嵌段共聚物聚己内酯-聚乙二醇-聚己内酯（PCEC），分别将PCEC、PEG-6000与PLA共混，考察其微观形貌、结晶性能、力学性能的区别。结果显示PCEC/PLA共混物的微观形貌是典型的"海岛"结构；在相同配比下，PCEC促进PLA结晶的能力要小于PEG-6000。当PCEC和PLA的质量比为15：85时，PCEC/PLA共混物的断裂伸长率最佳，相同质量比下的PEG-6000/PLA共混物的断裂伸长率比PCEC/PLA共混物的断裂伸长率要高7%，而拉伸强度要低50%。

       

      Abstract: To broaden the application of polylactide(PLA) in biomedical field,initiator PEG-2000 modified by titanium isopropoxide was introduced to the ring opening polymerization of caprolactone.A biodegradable triblock poly(ε-caprolactone)-poly(ethylene glycol)-poly(ε-caprolactone) (PCEC) was synthesized.The morphology,crystallization and tensile properties of PCEC/PLA blends with varied concentration of PCEC were investigated by comparison with PEG-6000/PLA blends.The SEM images show that PCEC/PLA blends exhibit a typical sea-island morphology with PCEC finely dispersed in PLA matrix as droplets.The crystallization ability of PLA in PCEC/PLA blends is weaker than PLA in PEG-6000/PLA.When the mass ratio of additive and PLA is 15:85,the elongation at break of PEG-6000/PLA blend is 7% higher than PCEC/PLA while the tensile strength is 50% lower.

       

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