Effect of Extrusion on the Mechanical and Rheological Properties of a Reinforced Poly(Lactic Acid): Reprocessing and Recycling of Biobased Materials

Materials

Vໜtor Peinado¹  Pere Castell¹  Lidia Garc໚²  Ángel Fernández³ 

[1] Fundación Aitiip, Polígono Industrial Empresarium C/Romero Nº 12, Zaragoza 50720, Spain;Tecnopackaging S.L., Polígono Industrial Empresarium C/Romero Nº 12, Zaragoza 50720, Spain;Escuela de Ingeniería y Arquitectura, University of Zaragoza, Av. Maria de Luna, 3, Zaragoza 50018, Spain;

关键词: polylactic acid;    nanocomposites;    nanoadditive;    melt strength enhancer;    reprocess;    rheology;    mechanical;    viscosity;    extrusion compounding;   

DOI  :  10.3390/ma8105360

来源: mdpi

【 摘 要 】

The aim of this research paper is to study the behaviour of a common used biopolymer (Poly(Lactic Acid) (PLA)) after several reprocesses and how two different types of additives (a melt strength enhancer and a nanoadditive) affect its mechanical and rheological properties. Systematic extraction of extrudate samples from a twin-screw compounder was done in order to study the effect in the properties of the reprocessed material. Detailed rheological tests on a capillary rheometer as well as mechanical studies on a universal tensile machine after preparation of injected specimens were carried out. Results evidenced that PLA and reinforced PLA materials can be reprocessed and recycled without a remarkable loss in their mechanical properties. Several processing restrictions and specific phenomena were identified and are explained in the present manuscript.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.