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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Sugar cane as an alternative green activator to conventional vulcanization additives in natural rubber compounds: Thermal degradation study

Texto completo
Autor(es):
Zanchet, A. [1] ; Demori, R. [2] ; de Sousa, F. D. B. [3] ; Ornaghi, Jr., H. L. [4] ; Schiavo, L. S. A. [5] ; Scuracchio, C. H. [6]
Número total de Autores: 6
Afiliação do(s) autor(es):
[1] IMED, Polytech Sch Civil Engn, Rua Senador Pinheiro 304, BR-99070220 Passo Fundo, RS - Brazil
[2] Univ Fed Rio Grande do Sul, Inst Chem, Ave Bento Goncalves 9500, BR-91501970 Porto Alegre, RS - Brazil
[3] Univ Fed Pelotas, Technol Dev Ctr, Rua Comes Carneiro 1, BR-96010610 Pelotas, RS - Brazil
[4] Univ Fed Rio Grande do Sul, PPGEM, Ave Bento Goncalves 9500, BR-91501970 Porto Alegre, RS - Brazil
[5] Univ Caxias do Sul, Dept Chem & Phys, Ctr Exact Sci & Technol, Rua Francisco Getulio Vargas 1130, BR-95070560 Caxias Do Sul, RS - Brazil
[6] Univ Fed Sao Carlos, Dept Mat Engn, Rodovia Washington Luis, Km 235, BR-13565905 Sao Carlos, SP - Brazil
Número total de Afiliações: 6
Tipo de documento: Artigo Científico
Fonte: JOURNAL OF CLEANER PRODUCTION; v. 207, p. 248-260, JAN 10 2019.
Citações Web of Science: 4
Resumo

It is essential to deeply understand the chemical changes caused in the rubber compositions when using green additives, especially in the thermal degradation and stability. So, the objective of this research is the evaluation of the thermal degradation behavior of a typical natural rubber (NR) compound modified by silanized activator derived from sugar cane (green additive). The activator was used in order to replace the conventional zinc oxide and stearic acid additives commonly used as vulcanization activators. Different contents (1, 3, 5, 7 and 10 phr) were used in the NR compounds and the thermal stability was evaluated. It was observed that, according to the degradation proceeds, the weight loss tended to be similar at low temperatures for all the studied compounds, i.e., the reinforcement effect of the green additive was more pronounced at higher temperatures. However, the activation energy values significantly increased by using up to 3 phr of the sugar cane activator. Compared to the Control sample, this result suggested that the solid-state degradation mechanism appeared to change when the activator from sugar cane was added in the samples. In addition, the morphology showed that silanization treatment acted positively on the additive dispersion within NR matrix. In this scenario, the favorable results obtained, as well as the considerable reduction of zinc content (81%) used in the compositions, highlighted the possibility of changing the conventional activators such as zinc oxide and stearic acid by a green option from sugar cane. (C) 2018 Elsevier Ltd. All rights reserved. (AU)

Processo FAPESP: 12/14844-3 - Obtenção e caracterização de artefatos elastoméricos contendo aditivos provenientes de fontes renováveis
Beneficiário:Carlos Henrique Scuracchio
Linha de fomento: Auxílio à Pesquisa - Regular