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Study of the relationship between physical-thermodynamic properties of leather and leather porosity

Field of Science:Arts and HumanitiesArts and Humanities (miscellaneous)Visual Arts and Performing ArtsChemical EngineeringChemical Engineering (miscellaneous)ChemistryChemistry (miscellaneous)EngineeringEngineering (miscellaneous)
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“TEXTILE JOURNAL OF UZBEKISTAN” Scientific-technical journal

“TEXTILE JOURNAL OF UZBEKISTAN” Scientific-technical journal

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ARTICLE ANNOTATION

quote
During chemical and physical processes, heat is released or absorbed. This indicates the processes of crystallization, melting, dehydration, decomposition of complex substances and morphological changes in the substance. The study and analysis of the above-mentioned thermal effects (characteristic of a phase transition in systems of substances or individual substances) form the basis of differential thermal analysis DTA. DTA is based on measuring the change in the energy of a substance or a system of substances. Physical or chemical processes are characterized by a number of endothermic and exothermic effects on a continuous differential curve with the release and absorption of heat. Based on the results of differential thermal analysis of chrome-enriched shoe upper leather, the following parameters were studied: TG effect %, DTA effect °C, DTC effect W/g, porosity %, indicators. Derivatograms of tanned, ded, finished navvos and chromed goat leathers are similar in nature, but differ in the degradation parameters of specific leathers. The experiments also showed that the porosity of the leather is a kind of indicator of thermal effects, and it was found that it causes a slight shift in temperature to the right or left. The information obtained during the experiments will be useful in developing regulations for the production of footwear from top-chrome leather, its use and, of course, in adjusting the parameters of the leather production technology.

AUTHORS

A.Hamitov

TOSHKENT TO'QIMACHILIK VA YENGIL SANOAT INSTITUTI

Tags

# porosity# technological process# leather production# raw hide# differential thermal analysis# physico-chemical properties

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Article Identifiers

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https://eroi.uz/11.100/A026-176556

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