期刊
POLYMER DEGRADATION AND STABILITY
卷 94, 期 4, 页码 527-532出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.polymdegradstab.2009.01.025
关键词
Melt behaviour; Viscosity; Flame retardant; EBA; EMAA; Calcium carbonate
资金
- BOREALIS AB, Business Region Gothenburg
- Region Vastra Gotaland
This work describes a halogen-free flame retardant material consisting of a polar ethylene copolymer, calcium carbonate and silicone elastomer. The flame retardant properties when using poly(ethylene-co-methacrylic acid) (EMAA) and poly(ethylene-co-butyl acrylate) (EBA) as the copolymer have been compared. Rheological measurements showed an increase in complex viscosity above 250 C due to ionomer formation between acidic groups in the polymer and calcium ions. The increase in viscosity occurs at lower temperatures with the EMAA material and the increase is stronger. This has great impact on the fire performance, as shown with cone calorimetry and dripping test. In order to further elucidate the flame retardant mechanism in detail, thermogravimetric analysis and infrared spectroscopy have been used. The influence of the amount of comonomer and melt flow ratio of the polymer is also commented. (c) 2009 Elsevier Ltd. All rights reserved.
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