Flame Retardant Effect of Isocyanate Trimer on Polyisocyanurate Foam

Mingyang Du, Chunze He, Canhui Zhou

Article ID: 320
Vol 1, Issue 1, 2018

VIEWS - 1576 (Abstract) 43 (PDF)

Abstract


The effect of isocyanate trimer on the flame retardancy mechanism of polyisocyanurate (PIR) foam was studied in three aspects, including the mechanism of thermal decomposition in the condensed phase, the barrier mechanism of carbon layer formation on the surface in the condensed phase, and the mechanism in the gaseous phase, by using infrared spectroscopy, scanning electron microscopy, thermal analysis, a cone calorimeter, and high-temperature pyrolysis gas chromatography mass spectrometry. The results show that the trimmer can improve the thermal stability of the PIR foam and is not easily decomposed in the combustion. The trimmer can increase the carbon content of the PIR foam to 29.9% of that of the polyurethane (PU) foam. The carbon layer formed is denser, and it can retard heat and oxygen and thus improve the flame retardant properties; trimer can reduce the release of flammable polyol gas, decompose into more carbon dioxide, which is an inert gas, and it has certain flame retardant effects in the gaseous phase.


Keywords


Polyisocyanurate foam; Isocyanate trimer; Flame retardant mechanism

Full Text:

PDF


References


1. Chen J. Polyisocyanate foam. Plastics 1989; 18(2): 4-10.

2. Tang M, Zhou Q, Tian C. Polyurethane modified polyisocyanurate foam heat resistance can study. Plastics Industry 2010; 38(10): 17-20.

3. Zhang J, Ji K, Xia Y. Polymer combustion and flame retardant technology. Chemistry Industrial Press, 2005.

4. Zhang Y, Xia Z, Huang H, Chen H. Thermal degradation polyurethane based on IPDI. Journal of Analytical and Applied Pyrolysis 2009; 84: 89-94.

5. Zhang Y, Xia Z, Huang H, Chen H. A degradation study of Waterborne polyurethane based on TDI. Polymer Testing 2009; 28: 264-269.

6. Kulesza K, Pielichowski K, German K. Thermal decomposition of bisphenol A-based polyetherurethanes blown with pentane: Part I-Thermal and pyrolytical studies. Journal of Analytical and Applied Pyrolysis 2006; 76: 243-248.

7. Kunze R, Schartel B, Bartholmai M, et al. TG-MS and TG FIIR applied for anunambiguous thermal analysis of intumescent coatings. Journal of Thermal Analysis and Calorimetry 2002; 70: 897-909.

8. Hu X, Wang D, Wang S. Synergistic effects of expandable graphite and dimethyl methyl phosphonate on the mechanical properties, fire behavior, and thermal stability of a polyisocyanurate-polyurethane foam. International Journal of Mining Science and Technology 2013; 23: 13-20.

9. Gao L P, Zheng G Y, Zhou Y H, et al. Synergistic effect expandable graphite, diethyl ethylphosphonate and organically-modified layered double hydroxide on flame retardancy and fire behavior of polyisocyanurate-polyurethane foam nanocomposite. Polymer Degradation and Stability 2014; 101: 92-101.

10. Modesti M, Lorenzetti A. An experimental method for comparison isocyanate conversion and trimer formation in polyisocyanate-polyurethane foams. European Polymer Journal 2001; 37: 949-954.




DOI: https://doi.org/10.24294/jpse.v1i1.320

Refbacks

  • There are currently no refbacks.


Copyright (c) 2018 Mingyang Du, Chunze He, Canhui Zhou

License URL: https://creativecommons.org/licenses/by-nc/4.0

This site is licensed under a Creative Commons Attribution 4.0 International License.