Effects of inorganic fillers on the flame-retardant and mechanical properties of rigid polyurethane foams

2013 ◽  
Vol 131 (10) ◽  
pp. n/a-n/a ◽  
Author(s):  
Jia-Ji Cheng ◽  
Bo-Bo Shi ◽  
Fu-Bao Zhou ◽  
Xiao-Yu Chen
Keyword(s):  
Mechanical Properties ◽  
Flame Retardant ◽  
Polyurethane Foams ◽  
Rigid Polyurethane Foams ◽  
Inorganic Fillers

Inherently flame-retardant rigid polyurethane foams with excellent thermal insulation and mechanical properties

Polymer ◽  
2018 ◽  
Vol 153 ◽  
pp. 616-625 ◽  
Author(s):  
Shui-Xiu Wang ◽  
Hai-Bo Zhao ◽  
Wen-Hui Rao ◽  
Sheng-Chao Huang ◽  
Ting Wang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Flame Retardant ◽  
Thermal Insulation ◽  
Polyurethane Foams ◽  
Rigid Polyurethane Foams

scholarly journals New Flame Retardant Systems Based on Expanded Graphite for Rigid Polyurethane Foams

2020 ◽  
Vol 10 (17) ◽  
pp. 5817 ◽  
Author(s):  
Anna Strąkowska ◽  
Sylwia Członka ◽  
Piotr Konca ◽  
Krzysztof Strzelec
Keyword(s):  
Mechanical Properties ◽  
Ionic Liquid ◽  
Flame Retardant ◽  
Construction Materials ◽  
Great Influence ◽  
Expanded Graphite ◽  
Polyurethane Foams ◽  
Bending Test ◽  
Maximum Temperature ◽  
Rigid Polyurethane Foams

The effect of the addition of new flame retardant systems on the properties of rigid polyurethane (RPUF) foams, in particular, reduction in flammability, was investigated. The modification included the introduction of a flame retardant system containing five parts by weight of expanded graphite (EG) (based on the total weight of polyol), one part by weight of pyrogenic silica (SiO2) and an ionic liquid (IL): 1-ethyl-3-methylimidazolium tetrafluoroborate ([emim] [BF4]), in an amount of 3:1 with respect to the weight of added silica. The kinetics of the synthesis of modified foams—including the growth rate and the maximum temperature—were determined and the physicochemical properties, such as the determination of apparent density and structure by optical microscopy, mechanical properties such as impact strength, compressive strength and, three-point bending test were determined. An important aspect was also to examine the thermal properties such as thermal stability or flammability. It has been shown that for rigid polyurethane foams, the addition of expanded graphite in the presence of silica and ionic liquid has a great influence on the general use properties. All composites were characterized by reduced flammability as well as better mechanical properties, which may contribute to a wider use of rigid polyurethane foams as construction materials.

Preparation and Characterization of Soybean Oil-based Flame Retardant Rigid Polyurethane Foams Containing Phosphaphenanthrene Groups

2020 ◽  
Vol 17 (10) ◽  
pp. 760-771
Author(s):  
Qirui Gong ◽  
Niangui Wang ◽  
Kaibo Zhang ◽  
Shizhao Huang ◽  
Yuhan Wang
Keyword(s):  
Soybean Oil ◽  
Flame Retardant ◽  
Chemical Structure ◽  
Cell Structure ◽  
Polyurethane Foams ◽  
Limiting Oxygen Index ◽  
Rigid Polyurethane Foams ◽  
Degradation Activation Energy ◽  
Ft Ir

A phosphaphenanthrene groups containing soybean oil based polyol (DSBP) was synthesized by epoxidized soybean oil (ESO) and 9,10-dihydro-oxa-10-phosphaphenanthrene-10-oxide (DOPO). Soybean oil based polyol (HSBP) was synthesized by ESO and H2O. The chemical structure of DSBP and HSBP were characterized with FT-IR and 1H NMR. The corresponding rigid polyurethane foams (RPUFs) were prepared by mixing DSBP with HSBP. The results revealed apparent density and compression strength of RPUFs decreased with increasing the DSBP content. The cell structure of RPUFs was examined by scanning electron microscope (SEM) which displayed the cells as spherical or polyhedral. The thermal degradation and flame retardancy of RPUFs were investigated by thermogravimetric analysis, limiting oxygen index (LOI), and UL 94 vertical burning test. The degradation activation energy (Ea) of first degradation stage reduced from 80.05 kJ/mol to 37.84 kJ/mol with 80 wt% DSBP. The RUPF with 80 wt% DSBP achieved UL94 V-0 rating and LOI 28.3. The results showed that the flame retardant effect was mainly in both gas phase and condensed phase.

Morphology and Mechanical Properties of Nylon-1010-filled Rigid Polyurethane Foams

2004 ◽  
Vol 36 (4) ◽  
pp. 333-349 ◽  
Author(s):  
Bo Yin ◽  
Zhong-Ming Li ◽  
Hui Quan ◽  
Ming-Bo Yang ◽  
Qiu-Ming Zhou ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Polyurethane Foams ◽  
Rigid Polyurethane Foams ◽  
Nylon 1010 ◽  
Morphology And Mechanical Properties

Effects of a novel phosphorus–nitrogen flame retardant on rosin-based rigid polyurethane foams

2015 ◽  
Vol 120 ◽  
pp. 427-434 ◽  
Author(s):  
Meng Zhang ◽  
Zhenyang Luo ◽  
Jinwen Zhang ◽  
Shuigen Chen ◽  
Yonghong Zhou
Keyword(s):  
Flame Retardant ◽  
Polyurethane Foams ◽  
Rigid Polyurethane Foams

A facile strategy to fabricate microencapsulated expandable graphite as a flame-retardant for rigid polyurethane foams

2015 ◽  
Vol 132 (31) ◽  
pp. n/a-n/a ◽  
Author(s):  
Xiao-Liang Zhang ◽  
Hong-Ji Duan ◽  
Ding-Xiang Yan ◽  
Li-Quan Kang ◽  
Wei-Qin Zhang ◽  
...  
Keyword(s):  
Flame Retardant ◽  
Polyurethane Foams ◽  
Expandable Graphite ◽  
Rigid Polyurethane Foams
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