Expandable graphite encapsulated by magnesium hydroxide nanosheets as an intumescent flame retardant for rigid polyurethane foams

2018 ◽  
Vol 135 (39) ◽  
pp. 46749 ◽  
Author(s):  
Yintao Wang ◽  
Feng Wang ◽  
Quanxiao Dong ◽  
Wenjing Yuan ◽  
Peng Liu ◽  
...  
Keyword(s):  
Flame Retardant ◽  
Magnesium Hydroxide ◽  
Polyurethane Foams ◽  
Intumescent Flame Retardant ◽  
Expandable Graphite ◽  
Rigid Polyurethane Foams

scholarly journals The Synergistic Effect of Ionic Liquid-Modified Expandable Graphite and Intumescent Flame-Retardant on Flame-Retardant Rigid Polyurethane Foams

Materials ◽  
2020 ◽  
Vol 13 (14) ◽  
pp. 3095 ◽  
Author(s):  
Yongjun Chen ◽  
Yuanfang Luo ◽  
Xiaohui Guo ◽  
Lijuan Chen ◽  
Demin Jia
Keyword(s):  
Thermal Decomposition ◽  
Ionic Liquid ◽  
Flame Retardant ◽  
Polyurethane Foams ◽  
Molecular Structures ◽  
Intumescent Flame Retardant ◽  
Expandable Graphite ◽  
Thermal Decomposition Mechanism ◽  
Rigid Polyurethane Foams ◽  
Synergistic Flame Retardant

In this study, a nitrogen–phosphorus intumescent flame-retardant 3-(N-diphenyl phosphate) amino propyl triethoxy silane (DPES), the ionic liquid (IL) of 1-butyl-3-methyl-imidazole phosphate, and a phosphorous-containing ionic liquid-modified expandable graphite (IL-EG), were synthesized, and their molecular structures were characterized. The flame-retardant rigid polyurethane foams (RPUFs) were compounded with synergistic flame-retardant IL-EG/DPES to study the effects of the combination IL-EG and DPES on the pore structure, mechanical properties, thermal decomposition behavior and thermal decomposition mechanism of RPUF. The results showed that IL-EG/DPES had good thermal stability, and an excellent expansibility and char yield. The flame-retardant RPUF, modified with IL-EG and DPES at the ratio of 1:1, had a relatively uniform pore size, the highest compressive strength, and an excellent flame-retardant performance due to the form interwoven hydrogen bonds between IL-EG and DPES, as well as the new synergistic flame-retardant coating on the RPUF surface to restrict the transfer of gas or heat into the PU matrix.

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

Expandable Graphite For Halogen-Free Flame-Retardant of High-Density Rigid Polyurethane Foams

2005 ◽  
Vol 44 (7) ◽  
pp. 1323-1337 ◽  
Author(s):  
Lei Shi ◽  
Zhong-Ming Li ◽  
Ming-Bo Yang ◽  
Bo Yin ◽  
Qiu-Ming Zhou ◽  
...  
Keyword(s):  
Flame Retardant ◽  
Polyurethane Foams ◽  
High Density ◽  
Expandable Graphite ◽  
Rigid Polyurethane Foams ◽  
Halogen Free
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