Effect of blend composition and organoclay loading on the nanocomposite structure and properties of miscible poly(methyl methacrylate)/poly(styrene-co -acrylonitrile) blends

Autor: Rajkiran R. Tiwari, Upendra Natarajan
Rok vydání: 2011
Předmět:
Materials science
Nanocomposite
Polymers and Plastics
General Chemistry
Blend composition
Blend miscibility
Clay fractions
Clay loadings
Clay nanocomposites
Clay platelets
Elongation-at-break
Filler loading
Halpin-Tsai composite models
matrix
Matrix phase
Micro-scales
Miscible blend
Nano scale
Nano-composite structure
Nanocomposite formations
Optimum value
Organically-modified montmorillonite clays
Poly(styrene-co-acrylonitrile)
Polymer blend composition
Structure characteristic
Tensile ductility
Thermal and tensile properties
Thermal degradations
Clay minerals
Esters
Filled polymers
Fillers
Loading
Nanocomposites
Organoclay
Polymer blends
Silicate minerals
Structure (composition)
Styrene
Tensile strength
Polymer matrix composites
Miscibility
Poly(methyl methacrylate)
chemistry.chemical_compound
Montmorillonite
chemistry
visual_art
Ultimate tensile strength
Materials Chemistry
visual_art.visual_art_medium
Polymer blend
Methyl methacrylate
Composite material
Zdroj: Polymer Engineering & Science. 51:979-991
ISSN: 0032-3888
DOI: 10.1002/pen.21887
Popis: 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. POLYM. ENG. SCI., 2011. © 2011 Society of Plastics Engineers
Databáze: OpenAIRE
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