Thermal and mechanical properties of cationic starch-graft-poly(butyl acrylate-co-methyl methacrylate) latex film obtained by semi-continuous emulsion polymerization for adhesive application

Autor(es)

Alcantara Rodrigues, Lina Dayse ^[1] ; Guerrini, Lilia Muller ^[1] ; de Oliveira, Mauricio Pinheiro ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Paulo, Dept Sci & Technol, Lab Polymer Synth & Proc, Sao Jose Dos Campos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY; v. 146, n. 1, p. 143-152, OCT 2021.
• Citações Web of Science: 0

Resumo

In this work, thermal and mechanical properties of cationic cassava starch-g-poly(butyl acrylate-co-methyl methacrylate) films with different amounts of cationic cassava starch (CCS) were studied. The objective of this work was to substitute a portion the monomers (BA/MMA) by CCS in the copolymer and to investigate the consequent effects on the properties of the polymer latex films (e.g., graft percentage, surface tension, thermal and mechanical properties). The results show that the grafting percentage decreased as the concentration of CCS increased. Thermal and mechanical properties of polymer films showed a direct relationship with respect to the content of CCS used and the grafting percentage. Higher grafting percentage led to improvement of the thermal degradation, which indicated better thermal stability than neat poly(BA/MMA). DSC analysis showed that theT(g)of the graft copolymers was a little lower as compared toT(g)values of un-grafted copolymers. The addition of CCS increases the tensile, elastic modulus and hardness properties of the polymer film, but the elongation at break decreased dramatically. The optimal CCS contents that maximized not only thermal properties, but also mechanical properties, were 7 and 10 mass%, which are directly related to the grafting percentage and CCS content in the formulation. In addition, these results create a new approach for the application of CCS graft-polymer as an adhesive for wood, paper and shoes insole applications. (AU)

• Processo FAPESP: 13/25619-3 - Síntese de nanopartículas poliméricas com estímulo resposta, obtidas via polimerização em emulsão e em miniemulsão para produção de carpete reciclável
• Beneficiário: MAURÍCIO PINHEIRO DE OLIVEIRA
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 18/12469-7 - Obtenção de adesivos sensíveis a pressão (PSA) via polimerização em emulsão e em miniemulsão do farneceno para produção de fitas adesivas
• Beneficiário: Dayane Batista Tada
• Modalidade de apoio: Auxílio à Pesquisa - Regular