Abstract：
:The aim of this work is to study the effects of different simulated mechanical recycling processes on the structure and properties of PLA. A commercial grade of PLA was melt compounded and compression molded, then subjected to two different recycling processes. The first recycling process consisted of an accelerated ageing and a second melt processing step, while the other recycling process included an accelerated ageing, a demanding washing process and a second melt processing step. The intrinsic viscosity measurements indicate that both recycling processes produce a degradation in PLA, which is more pronounced in the sample subjected to the washing process. DSC results suggest an increase in the mobility of the polymer chains in the recycled materials; however the degree of crystallinity of PLA seems unchanged. The optical, mechanical and gas barrier properties of PLA do not seem to be largely affected by the degradation suffered during the different recycling processes. These results suggest that, despite the degradation of PLA, the impact of the different simulated mechanical recycling processes on the final properties is limited. Thus, the potential use of recycled PLA in packaging applications is not jeopardized.
journal_name
J Environ Managejournal_title
Journal of environmental managementauthors
Beltrán FR,Lorenzo V,Acosta J,de la Orden MU,Martínez Urreaga Jdoi
10.1016/j.jenvman.2017.05.020subject
Has Abstractpub_date
2018-06-15 00:00:00pages
25-31eissn
0301-4797issn
1095-8630pii
S0301-4797(17)30480-2journal_volume
216pub_type
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