scholarly journals Effect of intercalation of layered double hydroxides with sulfonate-containing calix[4]arenes on the flame retardancy of castor oil-based flexible polyurethane foams

2019 ◽  
Vol 79 ◽  
pp. 106055 ◽  
Author(s):  
Abbas Mohammadi ◽  
De-Yi Wang ◽  
Alireza Sheikh Hosseini ◽  
Jimena De La Vega
Keyword(s):  
Flame Retardancy ◽  
Layered Double Hydroxides ◽  
Castor Oil ◽  
Polyurethane Foams ◽  
Flexible Polyurethane ◽  
Double Hydroxides

Impact of the combined use of layered double hydroxides, lignin and phosphorous polyol on the fire behavior of flexible polyurethane foams

2018 ◽  
Vol 125 ◽  
pp. 346-359 ◽  
Author(s):  
Sandra Gómez-Fernández ◽  
Martin Günther ◽  
Bernhard Schartel ◽  
M. Angeles Corcuera ◽  
Arantxa Eceiza
Keyword(s):  
Layered Double Hydroxides ◽  
Fire Behavior ◽  
Polyurethane Foams ◽  
Combined Use ◽  
Flexible Polyurethane ◽  
Double Hydroxides

Effect of aluminum diethylphosphinate on the thermal stability and flame retardancy of flexible polyurethane foams

2019 ◽  
Vol 106 ◽  
pp. 72-79 ◽  
Author(s):  
Xin Wang ◽  
Ping Zhang ◽  
Zunchu Huang ◽  
Weiyi Xing ◽  
Lei Song ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Flame Retardancy ◽  
Polyurethane Foams ◽  
Flexible Polyurethane

scholarly journals Novel MoS2–DOPO Hybrid for Effective Enhancements on Flame Retardancy and Smoke Suppression of Flexible Polyurethane Foams

ACS Omega ◽  
2020 ◽  
Vol 5 (6) ◽  
pp. 2734-2746 ◽  
Author(s):  
Maoyong Zhi ◽  
Quanyi Liu ◽  
Yinlong Zhao ◽  
Shansong Gao ◽  
Zheng Zhang ◽  
...  
Keyword(s):  
Flame Retardancy ◽  
Polyurethane Foams ◽  
Smoke Suppression ◽  
Flexible Polyurethane

scholarly journals Some Key Factors Influencing the Flame Retardancy of EDA-DOPO Containing Flexible Polyurethane Foams

Polymers ◽  
2018 ◽  
Vol 10 (10) ◽  
pp. 1115 ◽  
Author(s):  
Agnieszka Przystas ◽  
Milijana Jovic ◽  
Khalifah Salmeia ◽  
Daniel Rentsch ◽  
Laurent Ferry ◽  
...  
Keyword(s):  
Flame Retardancy ◽  
High Speed ◽  
Combustion Efficiency ◽  
Polyurethane Foams ◽  
Key Factors ◽  
Ul 94 ◽  
Microscale Combustion Calorimeter ◽  
Flexible Polyurethane ◽  
Combustion Calorimeter ◽  
Pu Foams

The role of various additives (emulsifier, anti-dripping agent) and formulation procedures (pre-dispersion of solid additives in polyol via milling) which influence the flame retardancy of 6,6′-[ethan-1,2-diylbis(azandiyl)]bis(6H-dibenzo[c,e][1,2]oxaphosphin-6-oxid) (EDA-DOPO) containing flexible polyurethane foams has been investigated in this work. For comparison, the flame retardancy of two additional structurally-analogous bridged 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO)-based compounds, i.e., ethanolamine-DOPO (ETA-DOPO) and ethylene glycol-DOPO (EG-DOPO) were also evaluated together with EDA-DOPO in flexible PU foams of various formulations. The flame retardancy of these three bridged-DOPO compounds depends on the type of PU formulation. For certain PU formulations containing EDA-DOPO, lower fire performance was observed. Addition of emulsifier and polytetrafluoroethylene (PTFE) to these PU formulations influenced positively the flame retardancy of EDA-DOPO/PU foams. In addition, dispersion of EDA-DOPO and PTFE via milling in polyol improved the flame retardancy of the PU foams. Mechanistic studies performed using a microscale combustion calorimeter (MCC) and its coupling to FTIR showed no difference in the combustion efficiency of the bridged-DOPO compounds in PU foams. From MCC experiments it can be concluded that these bridged-DOPO compounds and their decomposition products may work primarily in the gas phase as flame inhibitors. The physiochemical behavior of additives in PU formulation responsible for the improvement in the flame retardancy of PU foams was further investigated by studying the dripping behavior of the PU foams in the UL 94 HB test. A high-speed camera was used to study the dripping behavior in the UL 94 HB test and results indicate a considerable reduction of the total number of melt drips and flaming drips for the flame retardant formulations. This reduction in melt drips and flaming drips during the UL 94 HB tests help PU foams achieve higher fire classification.

scholarly journals Improving the flame retardancy of ethylene vinyl acetate composites by incorporating layered double hydroxides based on Bayer red mud

e-Polymers ◽  
2019 ◽  
Vol 19 (1) ◽  
pp. 129-140 ◽  
Author(s):  
Yi Qian ◽  
Kangjia Jiang ◽  
Long Li
Keyword(s):  
Vinyl Acetate ◽  
Flame Retardancy ◽  
Layered Double Hydroxides ◽  
Red Mud ◽  
Ethylene Vinyl Acetate ◽  
Precipitation Method ◽  
Infrared Spectrometry ◽  
Cone Calorimeter Test ◽  
Bayer Red Mud ◽  
Double Hydroxides

AbstractNowadays, reducing the hazards of bayer red mud (BRM) is an important research direction in the fields of environmental and safety. In this article, Mg/Al/Fe ternary layered double hydroxides (Mg/Al/Fe-LDHs) were synthesized successfully by a co-precipitation method based on introducing Mg2+ into the BRM suspension. The thermogravimetric analysis (TGA) results showed that the decomposition rate of LDHs is higher than that of BRM, which indicates that LDHs can absorb more heat than BRM during the decomposition process. Subsequently, BRM and LDHs were added into the ethylene vinyl acetate (EVA) to investigate its effects on reducing flammability of the composites. The cone calorimeter test (CCT) results demonstrated that 50 wt% LDH-B can make the peak value of HRR (PHRR) decrease from 1694.8 kW/m2 (EVA) to 199.2 kW/m2 (ELDH2). The smoke density test (SDT) results showed that the luminous flux of ELDH2 is nearly 95% at the end of test with a pilot flame, which is much higher than that of EVA and EBRM. The thermogravimetry-Fourier transform infrared spectrometry (TG-FTIR) results confirmed that LDHs can improve the thermal stability of composites and reduce the production of some toxic gases. Compared with BRM, the improved flame retardancy of Mg/Al/Fe-LDHs is ascribed to the introduction of Mg2+, which offering an enhanced catalytic carbonization capability, as well as the physical barrier effect of char residue layer catalyzed by the lamellar LDHs

Foam stability and polymer phase morphology of flexible polyurethane foams synthesized from castor oil

2014 ◽  
Vol 131 (17) ◽  
pp. n/a-n/a ◽  
Author(s):  
Chandan Sharma ◽  
Sanjay Kumar ◽  
A. Raman Unni ◽  
Vinod K. Aswal ◽  
Sangram K. Rath ◽  
...  
Keyword(s):  
Castor Oil ◽  
Foam Stability ◽  
Polyurethane Foams ◽  
Phase Morphology ◽  
Polymer Phase ◽  
Flexible Polyurethane
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