Effects of reactive compatibilization on the morphological, thermal, mechanical and rheological properties of intumescent flame retarded polypropylene

Song, Pingan and Shen, Yu and Du, Baoxian and Peng, Mao and Shen, Lie and Fang, Zhengping (2009) Effects of reactive compatibilization on the morphological, thermal, mechanical and rheological properties of intumescent flame retarded polypropylene. ACS Applied Materials & Interfaces, 1 (2). pp. 452-459. ISSN 1944-8244

Abstract

Flame-retardant polypropylene (PP) samples were in situ compatibilized with maleic anhydride grafted PP. Compatibilization reaction was verified by an IR spectrum and gel content measurements. Electron microscopy images showed that compatibilization could considerably reduce the size of the flame-retardant domains, control the phase morphology, and improve the interfacial adhesion between PP and intumescent flame retardant (IFR) with different IFR loading levels. The limiting oxygen index (LOI) of flame-retardant PP increased to different extents after compatibilization, indicating an improvement in the flame retardancy. Compatibilization enhanced the thermal stability to some extent and remarkably delayed thermal oxidative degradation of flame-retardant PP. For PP containing 20 wt % flame retardant, the temperature at which the maximum weight loss rate occurred was enhanced by about 99 °C after compatibilization. The storage modulus and glass transition temperatures were elevated to different extents. Tensile strengths of samples reduced in the presence of flame retardant alone but in the additional presence of compatibilizer were restored to levels similar to those of pure PP. Elongation-at-break values, however, showed IFR concentration-dependent reductions that were less for compatibilized samples. Furthermore, the complex viscosity of a compatibilized PP melt turned slightly smaller, which is favorable to melt processing.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 08 Aug 2019 05:23
Last Modified: 09 Aug 2019 05:19
Uncontrolled Keywords: mechanical property, morphology, polypropylene, reactive compatibilization, rheological properties, thermal properties
Fields of Research : 09 Engineering > 0912 Materials Engineering > 091299 Materials Engineering not elsewhere classified
Socio-Economic Objective: B Economic Development > 86 Manufacturing > 8699 Other Manufacturing > 869999 Manufacturing not elsewhere classified
Identification Number or DOI: 10.1021/am8001204
URI: http://eprints.usq.edu.au/id/eprint/35596

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