| 聚乳酸-聚乙二醇嵌段共聚物及其交联聚氨酯弹性体的性能研究 |
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| 引用本文： | 吴之中.聚乳酸-聚乙二醇嵌段共聚物及其交联聚氨酯弹性体的性能研究[J].信阳师范学院学报(自然科学版),1999,12(2):166-169. |
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| 作者姓名： | 吴之中 |
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| 作者单位： | 南开大学分子生物学研究所.天津,300071 |
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| 摘 要： | 通过改变聚乙二醇的用量，将丙交酯与聚乙二醇共聚制成嵌预聚体，用二苯基甲烷二异氰酸酯扩链后再用三羟甲基丙烷交联，制得系列聚氨酯型新颖性体。通过对其性能研究表明，随着ＰＥＧ含量的增加，共聚物的特性粘度降低，玻璃化转变温度降低，拉伸强度先升后降；聚氨酯弹性体的玻璃化转变温度降低，拉伸强度降低，而降解速度去加快。
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| 关 键 词： | 聚乳酸 聚乙二酸 嵌段共聚物 聚氨酯弹性体 |
Study on the Properties of poly(lactic acid)-poly (ethylene glycol) Copolymers and poly (lactic acid)-poly (ethylene glycol)/polyurethane Elastomer |
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| Wu Zhizhong.Study on the Properties of poly(lactic acid)-poly (ethylene glycol) Copolymers and poly (lactic acid)-poly (ethylene glycol)/polyurethane Elastomer[J].Journal of Xinyang Teachers College(Natural Science Edition),1999,12(2):166-169. |
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| Authors: | Wu Zhizhong |
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| Abstract: | The copolymers of poly (lactic acid)-poly(ethylene glycol) in different proportion were crosslinked to prepare polyurethane elastomer materials. The study on the properties shown that with the increasing of the content of PEG,the glass transition temperature and tensile strength of PLA-PEG/PU elastomer declined,but the degradation rate inclined. |
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| Keywords: | Poly(lactic acid)-poly(ethylene glycol) Polyurethane Elastomer Biodegradation |
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