Thermal stability of CR/CSM rubber blends filled with nano- and micro-silica particles
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The properties of filled polymers depend on the properties of the matrix and the filler, the concentration of the components and their interactions. In this research we investigated the rheological and mechanical properties and thermal stability of polychloroprene/chlorosulfonated polyethylene (CR/CSM) rubber blends filled with nano- and micro-silica particles. The density of the nano-silica filled CR/CSM rubber blends was lower than that of the micro-silica filled samples but the tensile strength and elongation at break were much higher. The nano-silica filled CR/CSM rubber blend has higher V (r0)/V (rf) values than micro-silica composites and show better polymer-filler interaction according to Kraus equation. The nano-silica filled CR/CSM rubber blends were transparent at all filler concentration, and have higher glass transition values than micro-silica filled compounds. The higher values of the glass transition temperatures for the nano- than the micro-filled cross-linked systems a...re indicated by DMA analysis. The nano-filled cross-linked systems have a larger number of SiO-C links than micro-filled cross-linked systems and hence increased stability.
Keywords:Nano- and micro-silica filler / Polychloroprene/chlorosulfonated polyethylene (CR/CSM) rubber blends / Thermal stability
Source:Journal of Thermal Analysis and Calorimetry, 2010, 100, 3, 881-888
- 19th Annual Workshop and Exhibition of the Canadian-Thermal-Analysis-Society, May 12-13, 2009, Ottawa, Canada