Journal
POLYMER-PLASTICS TECHNOLOGY AND ENGINEERING
Volume 55, Issue 14, Pages 1441-1449Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/03602559.2016.1163605
Keywords
Charring; degradation; flame retardant; hollow phenolic spheres; intumescent-like
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Funding
- Ningbo Natural Science Foundation [2013A610138]
- National Natural Science Foundation of China [21274159, 51473178]
- Zhejiang Province Preferential Postdoctoral Funded Project [Bsh13020570]
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An intumescent-like char layer was formed by introducing hollow phenolic microspheres into acrylonitrile-butadiene-styrene/oligomeric aryl phosphate/novolac epoxy resin. Acrylonitrile-butadiene-styrene-grafted maleic anhydride was used to improve their compatibility. Combustion and thermal degradation behaviors were studied. The results showed that the ABS composites containing 25wt% oligomeric aryl phosphate/novolac epoxy (3/2) obtains a limiting oxygen index as high as 50; however, it cannot be classified in the UL-94 test. Combination of oligomeric aryl phosphate/novolac epoxy, acrylonitrile-butadiene-styrene-grafted maleic anhydride, and hollow phenolic microspheres (23/10/2) improves the UL-94 grade of acrylonitrile-butadiene-styrene composites to V-1. A continuous and compact porous intumescent-like char layer is generated during combustion; thus, better flame retardancy is obtained. [GRAPHICS]
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