Inherently flame-retardant rigid polyurethane foams with excellent thermal insulation and mechanical properties
Autor: | Sheng-Chao Huang, Ting Wang, Yu-Zhong Wang, Shui-Xiu Wang, Wang Liao, Wen-Hui Rao, Hai-Bo Zhao |
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Rok vydání: | 2018 |
Předmět: |
chemistry.chemical_classification
Materials science Polymers and Plastics business.industry Organic Chemistry 02 engineering and technology Polymer 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Accelerated aging 0104 chemical sciences chemistry.chemical_compound Thermal conductivity Compressive strength chemistry Thermal insulation Materials Chemistry Triol Composite material 0210 nano-technology business Polyurethane Fire retardant |
Zdroj: | Polymer. 153:616-625 |
ISSN: | 0032-3861 |
Popis: | In an effort to overcome issues encountered in additive flame retardants for rigid polyurethane foams (RPUFs), a novel reactive flame-retardant triol (TDHTPP) based on a triazine and phosphate structure was designed and synthesized. This triol was chemically incorporated in the main chains of RPUFs as a chain-extender to prepare inherently flame-retardant RPUFs. TDHTPP showed good solubility in the polyols (polyol 4110 and PEG 400) of RPUF, making it convenient for industrial fabrication, such as in spay foaming. Excellent compatibility of TDHTPP with the polymer matrix endowed flame-retardant RPUFs (FR-RPUFs) much higher compressive strength than that of the neat RPUF, and a low thermal conductivity of ∼0.03 W/(m·K). Notably, with only 5 wt% of TDHTPP incorporated, the resultant RPUF displayed a UL-94 V-0 rating and more importantly, exhibited a great persistent flame retardancy during thermal accelerated aging tests at 140 °C for 96 h. Further characterization revealed that TDHTPP possessed both vapor-phase and condensed-phase flame-retardant behaviors, in which, vapor-phase action was dominant. This work provides a facile route to synthesize RPUFs with persistent flame retardancy, excellent thermal insulation and mechanical properties. |
Databáze: | OpenAIRE |
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