Mechanical Properties of IIR/OMMT Nanocomposites via Melt-Compounding and Solution Process
Abstract:Isobutylene-isoprene rubber (IIR)/organically modified montmorillonite (OMMT) nanocomposites were prepared by both melt-compounding and solution process. Organic modifiers were synthesized by the reaction of allyl bromide and alkyl amines to modify sodium montmorillonite (Na+-MMT). After modification of Na+-MMT with organic modifiers, the changes of d-spacing of OMMT were studied by X-ray diffraction (XRD). XRD patterns revealed that the d-spacing of Na+-MMT increase from 1.1 nm for Na+-MMT to 2.18 nm for the OMMT, indicating intercalation of organic modifier into the interlayers of montmorillonites. Mechanical properties of IIR/OMMT nanocomposites were studied by means of tensile measurements. Tensile strengths of IIR/OMMT nanocomposites prepared from melt-compounding and solution process were higher than those of IIR/Na+-MMT nanocomposites and pristine IIR. When the solution process was used, IIR/OMMT nanocomposites provided further improvement in mechanical properties, as compared to those prepared from melt-compounding, indicating the better interaction between IIR and OMMT.
Document Type: Research Article
Publication date: 2010-01-01
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