期刊
MATERIALS CHEMISTRY AND PHYSICS
卷 129, 期 3, 页码 823-831出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2011.05.016
关键词
Biopolymers; Immiscible blends; Microstructure
资金
- Spanish Ministry of Science and Innovation (MICINN) [MAT 2007-61116]
- CSIC
- MICINN
Polylactide, PLA, is a biodegradable thermoplastic polyester derived from biomass that has restricted packaging applications due to its high brittleness and poor crystallisation behaviour. Here, new formulations based on natural rubber-PLA blends have been developed. The processing windows, temperature, time, and rotor rate, and the rubber content have been optimised in order to obtain a blend with useful properties. The rubber phase was uniformly dispersed in the continuous PLA matrix with a droplet size range from 1.1 to 2.0 mu m. The ductility of PLA has been significantly improved by blending with natural rubber, NR. The elongation at break improved from 5% for neat PLA to 200% by adding 10 wt% NR. In addition, the incorporation of NR not only increased the crystallisation rate but also enhanced the crystallisation ability of PLA. These materials are, therefore, very promising for industrial applications. (C) 2011 Elsevier B.V. All rights reserved.
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