聚乳酸热塑性弹性体的研究进展

Research Progress of Poly(lactic acid)Thermoplastic Elastomer

热塑性弹性体(TPE)是一类应用领域非常广泛且极具发展潜力的高分子材料,然而目前TPE品种所选用的原料(包括单体或聚合物)绝大部分都是源于石油基不可再生资源。作为一种极具潜力替代石油基高分子的生物基脂肪族聚酯材料,聚乳酸(PLA)具有原料来源丰富并可再生、生物降解性良好、强度和模量高等优点,因此聚乳酸TPE的研究吸引了国内外学者广泛的关注。本文综述了PLA嵌段共聚物型TPE和PLA基动态硫化热塑性弹性体(TPV)的最近的研究进展,详细阐述了它们的制备路线以及材料的性能,最后指出了当前PLA热塑性弹性体研究中存在的不足。

Thermoplastic elastomers(TPEs)are a class of polymeric materials that have widespread applications and development potentials.However,the majority of raw materials(including monomers and polymers)used in the present commercial TPE grades are derived from non-renewable petroleum-base resources.As one kind of biobased aliphatic polyesters with the great potential to replace petroleum-based polymers,poly(lactic acid)(PLA)exhibits many advantages,such as abundant sources of raw materials,excellent biodegradability,and high strength/modulus,etc.Therefore,the research on PLA TPE has attracted extensive attentions from many domestic and foreign scholars.This paper reviewed the latest research progress in the fields of PLA block copolymer-type TPEs and PLA-based thermoplastic vulcanizates.And preparation routes and properties of both TPE materials were presented in detailed,and the existing problems in these TPE studies,was finally pointed out.