Book ChapterDOI
Numerical Study on Sample Thickness Dependence of Fire Response Properties of Polymeric Materials (Charring and Non-charring) in Standard Cone Calorimeter Test
Vishal Srivastav,S. Sabarilal,Amit Kumar +2 more
- pp 929-939
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TLDR
In this paper, the effect of sample thickness on fire response parameters of polymeric materials was investigated for both charring and non-charring polymeric polymers, and it was shown that properties such as peak mass loss rate, time to peak mass losses, average mass loss rates, and time to ignition vary with sample thickness.Abstract:
In standard cone calorimeter test fire response properties like time to ignition, peak mass loss rate, time to peak mass loss rate, average mass loss rate and burn out time are of interest. The ASTM 1354 [1] recommends sample thickness of less than 50 mm for the test. However, for thinner samples conditions on the unexposed side of the sample should represent actual conditions in real-life application as the test results may be affected by these conditions. Therefore, in this work, a numerical study is carried out to predict the effect of sample thickness on the fire response parameters of polymeric materials. Polymeric materials are broadly classified as charring (thermoset) and non-charring (thermos-plastic). A representative material in each category, namely CPVC (Chlorinated Polyvinyl Chloride) for charring polymer and PMMA (Poly Methyl Metha-Acrylate) for non-charring is studied. It was noted that properties like the peak mass loss rate, time to peak mass loss rate, average mass loss rate and time to ignition vary with sample thickness for both charring and non-charring polymer. These property values become constant for sample thicknesses beyond a certain value. The variation in properties is dependent on the condition on the backside of the sample. When an aluminium block was assumed to have been placed below the sample, the property variation was different from when an adiabatic condition was assumed. The fire response properties for charring and non-charring materials also exhibited different trends.read more
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Journal ArticleDOI
Experimental study on pyrolysis gas products of chlorinated polyvinyl chloride and its smoke properties during combustion
TL;DR: In this article, the pyrolysis gas products of chlorinated polyvinyl chloride (CPVC) are first discussed based on thermogravimetry-Fourier transform infrared spectra-mass spectrometry (TG-FTIR-MS) analysis.
References
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Journal ArticleDOI
Relevant model complexity for non-charring polymer pyrolysis
TL;DR: In this paper, the influence of the heat, mass and chemical mechanisms on the transient predictions of surface temperature and mass loss rate (non-flaming conditions) for PolyMethylMethAcrylate (PMMA) samples is investigated.
Journal ArticleDOI
Determination of the flammability properties of polymeric materials: A novel method
TL;DR: In this article, a novel sample holder for the cone calorimeter is proposed, which incorporates a large block of aluminium at the rear face of the sample under test to measure the heat losses at the sample precisely and enables more accurate calculation of the material flammability properties.
Journal ArticleDOI
Influence of decreased sample size on cone calorimeter results
TL;DR: In this article, the influence of the position of the sample on the sample holder of the decreased samples was also studied in order to investigate the possibility to use smaller samples than prescribed by the standard.
Journal ArticleDOI
A study of the effect of thickness on the thermal degradation and flammability characteristics of some composite materials using a cone calorimeter
TL;DR: In this article, the influence of the thickness on thermal and fire response characteristics of two types of composite materials was investigated, and the results showed that the thickness of the composite material had a significant impact on the fire response performance.