Abstract
Introduction. The article presents the results of a study of materials of various chemical nature (pine wood, high-density polyethylene, polyvinyl chloride) by the method of synchronous thermal analysis. The relevance of the application of a high-precision and informative method of synchronous thermal analysis for determining the indicators of fire hazard of solid substances and materials is substantiated. The methodology for determining the self-ignition temperature by thermal analysis methods is considered. Research task. The objective of the study was to improve the methods for determining the fire hazard indicators of substances and materials, in particular, the autoignition temperature. Methods. The following methods were used in the study: thermogravimetric analysis, differential thermogravimetry and the method of differential scanning calorimetry. Results and its discussion. As a result of the research, the regularities of thermal-oxidative degradation of polymeric materials were studied. It has been established that it is expedient to determine the auto-ignition temperature from the temperature of the maximum of the first derivative of the curve of differential scanning calorimetry of the thermal-oxidative destruction (combustion) of the material. The auto-ignition temperature values of the studied polymeric materials (pine wood, high-density polyethylene, polyvinyl chloride) were determined by synchronous thermal analysis method, which showed satisfactory agreement with the data obtained by standard methods presented in the literature. Conclusions. The high accuracy of synchronous thermal analysis method (the error during verification by the sensitivity of the device is below 3 %), as well as the satisfactory convergence of the results of parallel tests, allows us to assert the reliability of the obtained research results. The analysis of research results and their comparison with data from reference and literary sources indicates the possibility of using the method of synchronous thermal analysis to determine the autoignition temperature of solid materials. Keywords: thermal-oxidative degradation; auto-ignition temperature; differential scanning calorimetry.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
