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Effect of blend composition and organoclay loading on the nanocomposite structure and properties of miscible poly(methyl methacrylate)/poly(styrene-co- acrylonitrile) blends
Published in
2011
Volume: 51
   
Issue: 5
Pages: 979 - 991
Abstract
Organically-modified montmorillonite clay nanocomposites of poly(styrene-co-acrylonitrile) (SAN), poly(methyl methacrylate) (PMMA) and SAN/PMMA miscible blend are investigated. Structure characteristics at the nanoscale and microscale and thermal and tensile properties are studied as a function of polymer blend composition and filler loading fraction. Blend miscibility and Tg are unaffected by up to 10% by wt. organoclay. Thermal degradation stability increases with SAN content and exhibits an optimum value of clay loading. Stiffness shows significant improvement. Tensile strength and elongation-at-break suffer as a result of nanocomposite formation. Modulus shows a maximum enhancement of 57% (5 ± 0.06 GPa at 10 wt% filler, 20/80 SAN/PMMA) and varies linearly with clay fraction for all compositions of matrix phase. Predictions of Halpin-Tsai composite model are in excellent agreement with the experimental behavior over full range of polymer blend composition. Fundamental aspects of a polymer blend-clay nanocomposite are clarified, such as lack of additional synergy between clay platelets and matrix, and tensile ductility reduction, compared with polymer-clay system. © 2011 Society of Plastics Engineers.
About the journal
JournalPolymer Engineering and Science
ISSN00323888
Open AccessNo
Concepts (37)
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    Blend composition
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    BLEND MISCIBILITY
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    CLAY FRACTIONS
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    CLAY LOADINGS
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    Clay nanocomposites
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    Clay platelets
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    ELONGATION-AT-BREAK
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    Filler loading
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    HALPIN-TSAI COMPOSITE MODELS
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    Matrix
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    MATRIX PHASE
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    Micro-scales
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    MISCIBLE BLEND
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    Nano scale
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    NANO-COMPOSITE STRUCTURE
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    NANOCOMPOSITE FORMATIONS
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    Optimum value
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    ORGANICALLY-MODIFIED MONTMORILLONITE CLAYS
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    POLY(STYRENE-CO-ACRYLONITRILE)
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    POLYMER BLEND COMPOSITION
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    Structure characteristic
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    Tensile ductility
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    THERMAL AND TENSILE PROPERTIES
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    THERMAL DEGRADATIONS
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    Clay minerals
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    Esters
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    Filled polymers
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    Fillers
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    Loading
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    Nanocomposites
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    Organoclay
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    Polymer blends
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    Silicate minerals
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    Structure (composition)
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    Styrene
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    Tensile strength
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    Polymer matrix composites