Mechanical recycling of polylactide waste

Reusing polymeric materials poses a global challenge. Polymer recycling is thus becoming an important issue in the current economy.

The mechanical recycling of bioplasticsis considered one of the suitable method to do so. This study aims to report on the impact that mechanical recycling has on the properties of recycled polylactide (PLA) generated from production waste (punching residues) from PLA yogurt cups. Glue and printed paper sticking to waste PLA represented a special challenge in this process. The impact that optimising the recycling process had on the purity of the recycled material was evaluated. Changes to the optical, rheological, mechanical and thermal properties of the recycled PLA were investigated. The findings revealed that optimising the process had a positive impact on optical properties and on the paper content of recycled PLA. It was noted that recycled PLA had a higher melt mass flow rate than virgin material due to the polymer chain scission mechanism responsible for the reduction in molar mass and material degradation. Certain mechanical properties like tensile strength, elongation and modulus remained relatively constant.

Copyright: © Wasteconsult International
Quelle: Waste to Resources 2017 (Mai 2017)
Seiten: 11
Preis inkl. MwSt.: € 5,50
Autor: Ing. Denisa Bellušová
Prof. Hans-Josef Endres
Saskia Mauer

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