Initiation Parameters of Granulated Synthetic Polymers

Rantuch Peter (), Martinka Jozef (), Štefko Tomáš () and Wachter Igor ()
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Rantuch Peter: Slovak university of technology in bratislava, faculty of materials science and technology in trnava, institute of integrated safety, ulica jána bottu 2781/25, 917 24 trnava, Slovak Republic
Martinka Jozef: Slovak university of technology in bratislava, faculty of materials science and technology in trnava, institute of integrated safety, ulica jána bottu 2781/25, 917 24 trnava, Slovak Republic
Štefko Tomáš: Slovak university of technology in bratislava, faculty of materials science and technology in trnava, institute of integrated safety, ulica jána bottu 2781/25, 917 24 trnava, Slovak Republic
Wachter Igor: Slovak university of technology in bratislava, faculty of materials science and technology in trnava, institute of integrated safety, ulica jána bottu 2781/25, 917 24 trnava, Slovak Republic

Research Papers Faculty of Materials Science and Technology Slovak University of Technology, 2021, vol. 29, issue 48, 114-122

Abstract: Polymeric materials, which are currently very often used in various industries, are often transported and stored in the form of granules before processing. This method has several advantages, but in most studies the test samples are modified to different shapes and dimensions. This paper is therefore focused on the initiation of selected granular plastics. Samples of five polymeric materials were exposed to an external heat flux from 20 kW.m−2 to 40 kW.m−2. A spark initiator was used to ignite the released gaseous products of thermal decomposition of the polymer sample. FTP (flow-time product) method was applied to the obtained parameter - time to ignition, from which other initiation parameters were determined. The critical heat flux was determined in the range of 5.0 kW.m−2 - 11.8 kW.m−2. Despite the relatively small thickness (4 mm), the samples behaved as thermally thick. During the measurement, thin surface layer melted, and the rest of the polymer remained in its original granulated form. Ignition temperatures were calculated according to the Stefan-Boltzmann’s law between 273 °C - 402 °C.

Keywords: Critical heat flux; flow-time product; initiation; initiation temperature (search for similar items in EconPapers)
Date: 2021
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Persistent link: https://EconPapers.repec.org/RePEc:vrs:repfms:v:29:y:2021:i:48:p:114-122:n:1

DOI: 10.2478/rput-2021-0012

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