Synergistic effect of aluminum hydroxide and expandable graphite on the flame retardancy of polyisocyanurate-polyurethane foams

2013 ◽  
Vol 131 (4) ◽  
pp. n/a-n/a ◽  
Author(s):  
Wanjin Wang ◽  
Kui He ◽  
Quanxiao Dong ◽  
Ning Zhu ◽  
Yong Fan ◽  
...  
Keyword(s):  
Synergistic Effect ◽  
Aluminum Hydroxide ◽  
Flame Retardancy ◽  
Polyurethane Foams ◽  
Expandable Graphite

scholarly journals Influence of Organoclay on the Flame Retardancy and Thermal Insulation Property of Expandable Graphite/Polyurethane Foam

2019 ◽  
Vol 2019 ◽  
pp. 1-8 ◽  
Author(s):  
Nhung Hac Thi ◽  
Duy Linh Pham ◽  
Nguyen Thi Hanh ◽  
Ho Thi Oanh ◽  
Thi Hai Yen Duong ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Thermal Insulation ◽  
Flame Retardancy ◽  
Polyurethane Foams ◽  
Expandable Graphite ◽  
Insulation Property ◽  
Limiting Oxygen Index ◽  
Thermal Insulation Property ◽  
The One ◽  
Polyurethane Composites

The rigid polyurethane foams (RPUFs) filled with organoclay cloisite 20A and expandable graphite (EG) were prepared by the one-step expanding foam method. Flame behavior, mechanical properties, and thermal conductivity of the composites were investigated. The vertical burning test (UL-94V) and limiting oxygen index (LOI) showed that the flame retardancy was increased proportionally with the content of EG in PU composite. However, the presence of EG filler impaired the thermal insulation and the compressive strength of the composite. In this report, we proved that organoclay could improve the compressive strength, thermal insulation, and flame retardancy of EG/polyurethane composites. This work can contribute to the development of environment-friendly flame-retardant products for green growth.

Expandable graphite in polyurethane foams: The effect of expansion volume and intercalants on flame retardancy

2017 ◽  
Vol 134 (31) ◽  
pp. 45173 ◽  
Author(s):  
A. Lorenzetti ◽  
B. Dittrich ◽  
B. Schartel ◽  
M. Roso ◽  
M. Modesti
Keyword(s):  
Flame Retardancy ◽  
Polyurethane Foams ◽  
Expandable Graphite ◽  
Expansion Volume

scholarly journals Structure and Flame-Retardant Actions of Rigid Polyurethane Foams with Expandable Graphite

Polymers ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 686 ◽  
Author(s):  
Yongjun Chen ◽  
Yuanfang Luo ◽  
Xiaohui Guo ◽  
Lijuan Chen ◽  
Tiwen Xu ◽  
...  
Keyword(s):  
Flame Retardancy ◽  
Photoelectron Spectroscopy ◽  
Oxygen Index ◽  
Optical Microscope ◽  
Carbon Layer ◽  
Polyurethane Foams ◽  
Limit Oxygen Index ◽  
Expandable Graphite ◽  
Rigid Polyurethane Foams ◽  
Blending Method

In this paper, rigid polyurethane foams that were filled with expandable graphite (RPUF/EG) composites were prepared by the liquid blending method, and then the structure and flame retardancy performance of materials were investigated through optical microscope, scanning electron microscope, limit oxygen index, cone calorimeter, thermogravimetric analysis coupled to fourier transform infrared spectrum, and X-ray photoelectron spectroscopy. The results showed that a large number of EG could be good to the exhibition of flame retardancy of RPUF, where the optimal material was found at loading 15 phr EG that showed an increased limit oxygen index value and a decreased calorific or fuming value. TGA coupled FTIR and XPS revealed that EG could disassembled before RPUF under heating treatment, and it could form a pyknotic and enahnced residual carbon layer on RPUF surface after the fire, which restricted the transfer of gas, like oxygen or heat into PU matrix, finally resulting in the promotion of flame retardancy of RPUF.

Core-shell expandable graphite @ aluminum hydroxide as a flame-retardant for rigid polyurethane foams

2017 ◽  
Vol 146 ◽  
pp. 267-276 ◽  
Author(s):  
Yintao Wang ◽  
Feng Wang ◽  
Quanxiao Dong ◽  
Mingchen Xie ◽  
Peng Liu ◽  
...  
Keyword(s):  
Flame Retardant ◽  
Aluminum Hydroxide ◽  
Polyurethane Foams ◽  
Expandable Graphite ◽  
Core Shell ◽  
Rigid Polyurethane Foams
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