Abstract

The ongoing interest of researchers in bioderived polylactide (PLA) is due to the current tendency to replace petroleum-based plastics with polymers from renewable resources. Polylactide fits this trend because of its mechanical properties resembling those of some petroleum-based polymers commonly applied in daily life and because of its degradability. Added value is the excellent biocompatibility of PLA thanks to which it has found an application in biomedicine. This great interest in polylactide is reflected in the literature. Crosslinking of polylactide was also studied by many authors as an easy method of the improvement and the modification of its properties (thermal, mechanical, rheological, degradability) according to requirements of existing or possible applications. In the present review, the examples of polylactide and its copolymers crosslinking by chemical approaches described in the literature are presented. Thus, chemical methods including peroxide-induced radical crosslinking and crosslinking by coupling of functional PLA prepolymers via condensation/addition reactions are discussed. The results of PLA modification and examples of new, interesting materials obtained via different crosslinking methods are shown.

摘要

研究人员对生物衍生聚乳酸 (PLA) 的持续兴趣是由于目前用可再生资源的聚合物代替石油基塑料的趋势。聚乳酸符合这一趋势，因为它的机械性能类似于日常生活中常用的一些石油基聚合物，并且具有可降解性。附加值是 PLA 出色的生物相容性，因此它已在生物医学中得到应用。这种对聚丙交酯的极大兴趣反映在文献中。许多作者还研究了聚丙交酯的交联，作为根据现有或可能应用的要求改进和修改其性能（热、机械、流变、降解）的一种简单方法。在本次审查中，介绍了通过文献中描述的化学方法交联聚丙交酯及其共聚物的实例。因此，讨论了化学方法，包括过氧化物诱导的自由基交联和通过缩合/加成反应偶联功能性 PLA 预聚物的交联。显示了 PLA 改性的结果以及通过不同交联方法获得的有趣的新材料示例。