Hecheng xiangjiao gongye (Dec 2024)

Determination of ash content of rubber by thermogravimetric analysis

  • LI Xiao-yin, SONG Jie-rui, JIA Hui-qing, YANG Fang

DOI
https://doi.org/10.19908/j.cnki.ISSN1000-1255.2023.06.0465
Journal volume & issue
Vol. 46, no. 6
pp. 465 – 469

Abstract

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The ash content of rubber was determined by thermogravimetric analysis (TGA) and the effects of sample amount, sample representativeness, heating rate, combustion temperature and combustion atmosphere on the test results were studied and the repeatability and reproducibility of the method were determined. The results showed that the optimal conditions of TGA were sample mass between 10 mg and 20 mg, heating rate of 20 ℃/min or 30 ℃/min, combustion temperature for raw rubber and compounded rubber (or vulcanized rubber) of 550 ℃ and 650 ℃, respectively. The repeatability and reproducibility of TGA were all good. When ash mass fraction of 4 types of different rubbers were from 0.29% to 5.12%, the repeatability within laboratory was from 0.110% to 0.303%, and the reproducibility between laboratories was from 0.283% to 0.676%.

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