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PLA-PEG-PLA三嵌段共聚物的降解性能
发布时间:2025-07-23     作者:zyl   分享到:
医学文献:聚乳酸-聚乙二醇-聚乳酸三嵌段共聚物的分解耐热性做者:高建文,廖凯荣,全大萍,卢泽俭参考文献联结:内容提要:A series of polylactic acid (PLA) - polyethylene glycol (PEG) - polylactic acid (PLA) triblock copolymers were prepared by ring opening polymerization of lactide using stannous octoate as initiator and polyethylene glycol as co initiator The influence of PEG molecular weight and propylene ester/PEG molar ratio on the hydrolysis behavior of copolymers was investigated by examining the changes in intrinsic viscosity [η], mass, and thermal behavior of copolymers during hydrolysis in physiological saline The results indicate that PEG blocks have a significant impact on the hydrolysis rate of copolymers When the molar ratio of propylene glycol/PEG is constant, the larger the molecular weight of PEG, the easier it is for the copolymer to hydrolyze; When the PEG block length is constant, the higher the molar ratio of propylene ester/PEG, the slower the hydrolysis rate of the copolymer

PLA-PEG-PLA

以苦不堪言亚锡为致使剂,聚乙二醇大碳原子为共致使剂实施丙交酯开环缩聚分离纯化了品类聚乳酸(PLA)-聚乙二醇(PEG)-聚乳酸(PLA)三嵌段共聚物.从共聚物在生活蒸馏水内油脂水解时属性黏性[η],质量管理和热动作的变换,企业考察了含PEG碳原子量和丙交酯/PEG摩尔装料校验共聚物油脂水解动作的损害.然而证明,PEG嵌段对共聚物的油脂溶解的运行速度有相当重要会影响.丙交酯/PEG摩尔喂料比必然时,PEG大分子量越大,共聚物更很容易油脂溶解;PEG嵌段段长度必然时,丙交酯/PEG摩尔喂料比越大,共聚物油脂溶解的运行速度相当迟滞.有关于推送:mPEG-CH3mPEG-tri-Glutamic AcidmPEG-di-Glutamic AcidmPEG-FAmPEG-PEI(25K)mPEG-SBAmPEG-PCL(3K)mPEG-SS-C30mPEG-PCL(10K)mPEG-PCL(12K)mPEG-AlkenemPEG-DFmPEG-DBCO往上文章标题网站内容从何而来特殊学术期刊或医学文献,予以抄袭请沟通你们删除图片!