Journal
EUROPEAN POLYMER JOURNAL
Volume 46, Issue 5, Pages 881-890Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.eurpolymj.2010.02.007
Keywords
Silicone; Nanocomposite; Masterbatch; Clay
Categories
Funding
- FAPESP [03/09926-1]
- CNPq [142091/2004-9]
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [03/09926-1] Funding Source: FAPESP
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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.
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