期刊
RSC ADVANCES
卷 7, 期 85, 页码 54021-54030出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ra11437k
关键词
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资金
- National Natural Science Foundation of China [51403048, 21702042, 51606092, 51276054]
- Anhui Provincial Natural Science Foundation [1508085QE111, 1508085QB31]
- Natural Science Foundation in University of Anhui Province [KJ2016A606, KJ2015A275]
- Talent Scientific Research Foundation of Hefei University [16-17RC07, 14RC06]
- Natural Science Projects in Research Development Foundation of Hefei University [16ZR09ZDA]
- Program for Excellent Young Talents in University of Anhui Province [gxfx2017098]
- Open Project Program of the State Key Laboratory of Fire Science [HZ2016-KF02]
Highly efficient flame retardants for engineering plastics are needed to reduce the deterioration of the mechanical and other properties of the host polymer. Herein, a novel functionalized polyhedral oligomeric silsesquioxane (F-POSS) containing phosphorus and nitrogen has been synthesized by the reaction between N-phenylaminopropyl-POSS and diphenylphosphinic chloride. Untreated POSS and F-POSS have been respectively mixed with poly(1,4-butylene terephthalate) (PBT) to prepare the nanocomposites via the melt blending method. PBT/F-POSS shows improved mechanical properties, thermal stability and thermo-oxidative resistance in comparison with PBT/POSS. F-POSS exhibits a more significant inhibiting effect on the smoke production of PBT in the early heating stage of smoke density testing without a flame. In cone calorimeter tests, the peak heat release rate (PHRR), peak smoke production rate (PSPR), peak carbon dioxide production (PCO2P) and peak carbon monoxide production (PCOP) of PBT/F-POSS are reduced by 50%, 46%, 45% and 35%, respectively, compared to those of neat PBT. Residue analysis indicates that more C and O elements are left during the expansion and carbonization process in which phosphinic groups of F-POSS can capture the free radicals or decomposed products produced from PBT to form a stable SiOxCyPz network. The multiple protective char layers act as a thermal barrier at the surface of the substrate to reduce the fire, smoke and toxicity hazards. This work provides a facile and simple way to achieve high-performance PBT nanocomposites.
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