期刊
POLYMER DEGRADATION AND STABILITY
卷 97, 期 8, 页码 1297-1304出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.polymdegradstab.2012.05.027
关键词
Polycarbonate; Graphene; Foams; Thermal stability
资金
- MICINN (Government of Spain) [MAT2010-15565, MAT2011-26410]
A thermogravimetric study in both nitrogen and air atmospheres has been carried out on unfilled and graphene-reinforced solid and foamed polycarbonate. Polycarbonate foams were prepared using a supercritical CO2 dissolution one-step batch foaming process. Results showed that polycarbonate displayed a characteristic one-step decomposition under nitrogen, while three-step degradation was observed in air. In addition, as-received pristine graphene nanoplatelets displayed a three-step degradation in air, compared to a mild degradation under nitrogen. It was found that the thermal stability remarkably improved for the foamed composites, related to a combination of a heat transfer reduction promoted by the insulating cellular structure and the presence of the platelet-like graphene, which helped create a physical barrier effect, delaying the escape of volatile products generated during decomposition. (C) 2012 Elsevier Ltd. All rights reserved.
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