Extrusion foamability of the modified biopolymer polylactide (PLA)

改性生物聚合物聚丙交酯（PLA）的挤出发泡性能

• 批准号: 242427360
• 负责人: Professor Dr.-Ing. Volker Altstädt
• 金额: --
• 依托单位: Institut für Kunststofftechnik (IKT)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2013
• 资助国家: 德国
• 起止时间: 2012-12-31 至 2016-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/242427360?language=en
• 关键词: Extrusion; foamability; modified; biopolymer; polylactide

Foams are characterized by very low density, very low thermal conductivity, high sound attenuation and low tooling costs. Most of the foamed mouldings are for relatively short-lived transport packaging, e.g. for electronic equipment and insulation applications. Polylactide (PLA) is a biodegradable and at the same time, a biobased polymer which is produced in commercially significant amounts from the inexpensive lactic acid. To provide an additional disposal option for packaging made of foam / or to save fossil hydrocarbon sources, it is desirable to prepare polymeric foams on the basis of PLA which is available in large quantities. But due to its low melt strength, foaming of PLA is currently not possible. This research project aims to develop new and cost-effective ways to modify PLA, leading to an increased melt strength and therefore to enable the extrusion foamability of PLA.

泡沫的特点是密度极低，导热系数极低，声衰减高，加工成本低。大多数发泡模具用于相对较短的运输包装，例如电子设备和绝缘应用。聚乳酸（PLA）是一种可生物降解的，同时也是一种生物基聚合物，从廉价的乳酸中大量生产。为了为泡沫制成的包装提供额外的处理选择或节省化石碳氢化合物来源，希望在PLA的基础上制备聚合物泡沫，这是大量可用的。但由于PLA的熔融强度低，目前还不可能发泡。本研究项目旨在开发新的和具有成本效益的方法来改性聚乳酸，导致增加熔融强度，从而使聚乳酸的挤出发泡性。