THE MELT\SHRINK EFFECT OF LOW DENSITY THERMOPLASTICS INSULATES: CONE CALORIMETER TESTS

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Yong JIANG Qiang XU Cong JIN Jordan HRISTOV Greg GRIFFIN

Abstract

The melt\shrink effects on the fire behaviour of low-density thermoplastic foam have been studied in a cone calorimeter. The experiments have been performed with four samples of expanded polystyrene (EPS) foams having different thicknesses and two extruded polystyrene (XPS) foams. Decrease in surface area and increase in density, characterizing the melt\shrink effect have been measured at different incident heat fluxes. Three of these foams tested have been also examined by burning tests at an incident heat flux of 50kW m-2. It was assessed that the fire behavior  predictions based the current literature models provided incorrect results if the cone test results were applied directly. However, the correct  models provided  adequate results when the initial burning area and the density of the molten foam were used to correct the initial cone calorimeter data. This communication refers to the fact that both the effective burning area and the density of the molten foam affect the cone calorimeter data, which requires consequent corrections to attain adequate predictions of models about the materials fire behaviour.

Article Details

How to Cite
JIANG, Yong et al. THE MELT\SHRINK EFFECT OF LOW DENSITY THERMOPLASTICS INSULATES: CONE CALORIMETER TESTS. Thermal Science, [S.l.], mar. 2017. ISSN 2334-7163. Available at: <http://thermal-science.tech/journal/index.php/thsci/article/view/2122>. Date accessed: 23 june 2017. doi: https://doi.org/10.2298/TSCI150304058X.
Section
Articles
Received 2017-03-02
Accepted 2017-03-13
Published 2017-03-13

References

[1] *** http://www.nist.gov/el/fire_protection/buildings/flammability_of_thermoplastic_materials.mht
[2] Marti J., Ryzhakov P., Idelsohn S., Onate E. Combined Eulerian-PFEM approach for analysis of polymers in fire situations, Int. J. Numer. Meth. Eng., 92 (2012), 9, pp.782-801
[3] Onate E., Rossi R., Idelsohn S.R., Butler K.M.. Melting and spread of polymers in fire with the particle finite element method, Int. J. Numer. Meth. Eng., 84 (2010), 8, pp.1046-72
[4] Wang Yong, Zhang Feng, Chen Xilei, Jin Yang and Zhang Jun. Burning and dripping behaviors of polymers under the UL94 vertical burning test conditions. Fire Mater.3 4 (2010), 4, pp.203-215
[5] Yong Wang, Jun Zhang. Thermal stabilities of drops of burning thermoplastics under the UL 94 vertical test conditions, J. Hazard. Mater. (2013), 246-247, pp.103-109
[6] Wang Yong, Jow, Jinder, Su Kenny, Zhang Jun. Dripping behavior of burning polymers under UL94 vertical test conditions, J. Fire Sci. 30 (2012), 6, pp. 477-501
[7] Yong Wang, Jinder Jow, Kenny Su, Jun Zhang. Development of the unsteady upward fire model to simulate polymer burning under UL94 vertical test conditions. Fire Safety J. 54 (2012), 8, pp. 1-13
[8] Ezgi S.Oztekin, Sean B. Crowley, Richard E. Lyon, Stanislav I. Stoliarov, Parina Patel,T. Richard Hull, Sources of variability in fire test data: A case study on poly(aryl ether ether ketone) (PEEK), Combust. Flame, 159 (2012), 4, pp.1720-1731
[9] Xuegui Wang, Xudong Cheng, Liming Li, Siuming Lo, Heping Zhang. Effect of ignition condition on typical polymer’s melt flow flammability, J. Hazard. Mater. 190 (2011), 1-3, pp. 766-771
[10] Mamourian, M., Esfahani, J.A., Ayani, M.B., Experimental and scale up study of the flame spread over the PMMA sheets , Thermal Science 13 (1), pp. 79-88, 2009
[11] Ayani, M.B., Esfahani, J.A., Sousa, A.C.M., The effect of surface regression on the downward flame spread over a solid fuel in a quiescent ambient, Thermal Science 11 (2), pp. 67-86, 2007
[12] Esfahani, J.A., Abdolabadi, A.G., effect of char layer on transient thermal oxidative degeradation of polyethylen, Thermal Science 11 (2), pp. 23-36, 2007
[13] Xie Qiyuan, Zhang Heping, Ye Ruibo, Experimental Study on Melting and Flowing Behavior of Thermoplastics Combustion Based on a New Setup with a T-shape Trough, J. Hazard. Mater.166 (2009), 2-3, pp. 1321-1325
[14] Xie Qiyuan, Zhang Heping, Xu Liang. Large Scale Experimental Study on Combustion Behavior of thermoplastics with Different Thickness, J. Thermoplast. Compos. Mater., 22 (2009), 5, pp. 443-451
[15] Kandola B.K., Price D., Milnes G.J., Da Silva A. Development of a novel experimental technique for quantitative study of melt dripping of themoplastic polymers, Polym. Degrad. Stabil., 98 (2013) , 1, pp.52-63
[16] Q Xu, Cong Jin, Greg Griffin, Yong Jiang. Fire Safety Evaluation of Expanded Polystyrene Foam by Multi-scale Methods. J Therm Anal Calorim, 115 (2014), 2, pp.1651-1660.
[17] Smart Gillian, Kandola Baljinder K., Horrocks A. Richard, Nazare Shonali, Marney Donavan. Polypropylene fibers containing dispersed clays having improved fire performance. Part II: Characterization of fibers and fabrics from PP-nanoclay blends. Polym. Adv. Tech., 19 (2008), 6, pp. 658-670
[18] Jozef Martinka, Tomas Chhrebet, Karol Balog. An assessment of petrol fire risk by oxygen comsumption calorimetry. Published online 18 Mar. 2014, J Therm Anal Calorim.
[19] Xu Q, Griffin GJ, Burch I, Jiang Y, Preston C, Bicknel AD, Bradbury GP, White N. Predicting the time to flashover for GRP panels based on cone calorimeter test results, J. Therm.Anal. Calorim., :91 (2008),3, pp:759-762.
[20] Przemyslaw Rybinski, Grazyna Janowska, Malgorzata Jozwiak, Marek Jozwiak. Thermal stability and flammability of styrene-butadiene rubber (SBR) composites. J Therm Anal Calorim. 113 (2013), 1, pp.43-52.
[21] Lindholm Johan, Brink Anders, Hupa Mikko. Influence of decreased sample size on cone calorimeter results, Fire Mater. 36 (2012), 1, pp. 63-73.
[22] Gregory J. Griffin, Ashley D. Bicknell, Glenn P. Bradbury, Nathan White. Effect of Construction Method on the Fire Behavior of Sandwich Panels with Expanded Polystyrene Cores in Room Fire Tests, J. Fire Sci. 24 (2006), 2, pp. 275-294.
[23] B. A. L. Östman and L. D. Tsantaridis. Correlation between cone calorimeter data and time to flashover in the room fire test, Fire Mater. 18 (1994), 4, pp. 205-209
[24] H. Hansen and P. J. Hovde. Prediction of Time to Flashover in the ISO 9705 Room Corner Test based on Cone Calorimeter Test Results, Fire Mater. 26 (2002), 2, pp.77-86

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