High molar mass silicone rubber reinforced with montmorillonite clay masterbatches: Morphology and mechanical properties

Autor(es)

Kaneko, Manuela L. Q. A. ^[1] ; Romero, Rafaelle Bonzanini ^[1] ; Goncalves, Maria do Carmo ^[1] ; Yoshida, Inez V. P. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Inst Chem, BR-13083970 Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: EUROPEAN POLYMER JOURNAL; v. 46, n. 5, p. 881-890, MAY 2010.
• Citações Web of Science: 30

Resumo

Rubber composites were obtained from natural (MT) or organomodified (O-MT) montmorillonite clay masterbatches and high molar mass poly(dimethylsiloxane)-gum (PDMS). The masterbatches were prepared by compounding MT or O-MT with a siloxane-polyether surfactant. The rubber composites were characterized by X-ray diffraction, small angle/wide angle X-ray scattering, scanning and transmission electron microscopies and tensile tests. The results showed that masterbatch compounding with O-MT improved the dispersion of this clay into the PDMS matrix. The morphology of the resulting composite showed a combination of intercalated and partially exfoliated clay layers with occasional clay aggregates. The addition of only 5 phr of O-MT into the PDMS matrix, via masterbatch compounding, improved the tensile strength as much as that obtained with the composite filled with 30 phr of O-MT clay prepared by the direct addition of the clay to PDMS. Moreover, the elongation at break was improved by at least 126%. (C) 2010 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 03/09926-1 - Materiais poliméricos e cerâmicos
• Beneficiário: Inez Valeria Pagotto Yoshida
• Modalidade de apoio: Auxílio à Pesquisa - Programa PRONEX - Temático