共查询到20条相似文献,搜索用时 78 毫秒
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针对生物可降解材料聚乳酸的一些缺点,提出了几种改性的方法,并对聚乳酸成型加工常用的两种方法,即挤出成型和注射成型做了介绍,最后对聚乳酸的应用进行了展望. 相似文献
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新型生物降解材料聚乳酸的微孔发泡技术研究进展 总被引:1,自引:0,他引:1
介绍了新型生物可降解材料聚乳酸(PLA)微孔塑料的最新研究进展,并详细介绍了PLA微孔塑料的泡孔形态和力学性能的影响因素. 相似文献
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综述近几年生物可降解材料聚乳酸的阻燃改性研究进展.聚乳酸的阻燃改性主要采用添加阻燃剂,并以卤系、磷系、氮系、硅系、金属化合物阻燃剂以及多种阻燃成分的复配为主. 相似文献
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Yuanyuan Chen Luke M. Geever John A. Killion John G. Lyons Clement L. Higginbotham 《Polymer-Plastics Technology and Engineering》2016,55(10):1057-1075
Poly (lactic acid) is considered to be a promising alternative to petroleum-based polymers due to its renewability, biodegradability, biocompatibility, and good mechanical properties. Because of the high cost, the applications of poly (lactic acid) were limited to the medical field. Over the past decade, improvements in polymerization allow the economical mass production of high molecular weight poly (lactic acid). Therefore, the applications of poly (lactic acid) have recently spread to domestic, commercial packaging, and textile applications. This review outlines the chemical, thermal characteristics of poly (lactic acid) and discusses the use of poly (lactic acid) in medical applications such as sutures, stents, drug carrier, orthopaedic devices, scaffolds, as well as commercial applications in textile and packaging fields with superior properties such as high wicking performance, good dyeability, antibacterial feature, good ultraviolet resistance, high water vapor transmission rates, shrink wrapping, and dead fold property. While the drawbacks of poly (lactic acid) utilized in these fields are also discussed. It is clear that the advantages of using poly (lactic acid) outlined in this review will ensure that the market for poly (lactic acid) products will continue to expand. 相似文献
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简述了近年来聚乳酸(PLA)尤其是聚左旋乳酸(PLLA)的化学合成方法(缩合聚合和开环聚合)及其结构与性能,并对这类材料的应用和发展作了展望。 相似文献
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聚乳酸的合成及其在生物医药领域的应用进展 总被引:2,自引:1,他引:1
综述了近几年聚乳酸的合成,讨论了聚合过程中聚合时间、聚合温度、催化剂、体系真空度等对聚合反应的影响;介绍了聚乳酸在药物控制释放、组织工程材料、骨科材料、医用缝合线、眼科植入材料等生物医药领域的应用. 相似文献
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采用差示扫描量热法对聚乳酸/聚癸二酸丙三醇酯(PLA/PGS)共混物的非等温结晶行为进行研究,并使用Jeziorny法修正了Avrami方程中的结晶动力学常数.结果表明,PGS的加入降低了PLA的结晶温度,结晶度随升温速率的增加而增加.Avrami指数n与升温速率及PGS的含量无关,结晶生长机理为二维方式;修正后的结晶动力学常数随升温速率的增加而增加,PGS的加入对其影响不大. 相似文献