Foam extrusion of modified bioplastic on basis of polylactide (PLA)

基于聚丙交酯（PLA）的改性生物塑料的泡沫挤出

• 批准号: 379522332
• 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: 2017
• 资助国家: 德国
• 起止时间: 2016-12-31 至 2020-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/379522332?language=en
• 关键词: Foam; extrusion; modified; bioplastic; basis

Foams are characterized by very low density, very low thermal conductivity, high sound absorption and low tooling costs. Most foamed moldings are used in relatively short-living transport packaging, e.g. electronic devices and in insulation applications. Polylactide (PLA) is a biodegradable and biobased plastic, which is produced in commercially significant amount of cost-effective lactic acid. In order to provide additional disposal option for foamed packaging after the lifetime and/or to scarce fossil resources, it is desirable to establish extrusion foams on the basis of PLA. Due to its low melt strength, this is not currently possible. Despite several approaches to increase the melt strength through long chain branching there are several open questions to the conformation of long chain braching. The aim of the projected research project here is to clarify open questions regarding various zero viscosities, different numbers of functional groups, different reaction mechanisms of modification and interactions in blends of linear and modified PLA to increase its melt stiffness and thus to enable the extrusion foaming.

泡沫的特点是密度很低、导热性很低、吸音性高和加工成本低。大多数发泡模制品用于寿命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生物基塑料，它是以商业上大量的具有成本效益的乳酸生产的。为了在使用寿命后和/或对稀缺的化石资源提供泡沫包装的额外处置选择，期望建立基于PLA的挤出泡沫。由于其低熔体强度，这目前是不可能的。尽管有几种方法通过长链支化来增加熔体强度，但长链支化的构象仍存在几个悬而未决的问题。这里计划的研究项目的目的是澄清有关线性和改性PLA共混物中的各种零粘度、不同数量的官能团、不同的改性反应机制以及相互作用的悬而未决的问题，以增加其熔体刚度，从而实现挤出发泡。

项目成果

Effects of chemical modifications on the rheological and the expansion behavior of polylactide (PLA) in foam extrusion

• DOI: 10.1515/epoly-2019-0030
• 发表时间: 2019-01
• 期刊: e-Polymers
• 影响因子: 3.7
• 作者: T. Standau;S. Castellón;Agathe Delavoie;C. Bonten;V. Altstädt

Evaluation of the Zero Shear Viscosity, the D-Content and Processing Conditions as Foam Relevant Parameters for Autoclave Foaming of Standard Polylactide (PLA)

• DOI: 10.3390/ma13061371
• 发表时间: 2020-03-02
• 期刊: MATERIALS
• 影响因子: 3.4
• 作者: Standau, Tobias;Long, Huan;Altstaedt, Volker
• 通讯作者: Altstaedt, Volker

Development of in situ nanofibrillar poly (lactic acid)/poly (butylene terephthalate) composites: Non-isothermal crystallization and crystal morphology

• DOI: 10.1016/j.eurpolymj.2020.109489
• 发表时间: 2020-02-15
• 期刊: EUROPEAN POLYMER JOURNAL
• 影响因子: 6
• 作者: Shahnooshi, Mahboobeh;Javadi, Azizeh;Altstaedt, Volker
• 通讯作者: Altstaedt, Volker

Effect of the chemical modification on the thermal and rheological properties of different polylactides for foaming

化学改性对不同发泡聚丙交酯热性能和流变性能的影响

• DOI: 10.1063/1.5142983
• 发表时间: 2019
• 作者: Murillo Castellón;Standau;Altstädt;Bonten
• 通讯作者: Bonten