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Solution blending of polystyrene and poly(methyl methacrylate)
Author(s) -
Burns Charles M.,
Kim Woo Nyon
Publication year - 1988
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760282105
Subject(s) - materials science , polystyrene , differential scanning calorimetry , methyl methacrylate , poly(methyl methacrylate) , glass transition , polymer , scanning electron microscope , polymer blend , polymer chemistry , composite material , casting , molar mass distribution , chemical engineering , copolymer , thermodynamics , physics , engineering
Blends of poly(methyl methacrylate) (PMMA) and polystyrene (PS) have been investigated by differential scanning calorimetry and scanning electron microscopy. Blends were made of a low molecular weight PS with three PMMAs having number‐average molecular weights of (1) 18,300, (2) 37,000, and (3) 211,000, The blend was found to be partially miscible. The composition‐dependent values of the polymer‐polymer interaction parameter ( g 12 ) were determined and found to be from 0.015 to 0.029 for solution casting at 25°C. The interaction parameter ( g 12 ) increases with increasing PMMA molecular weights in the PMMA/PS blend systems. This result is consistent with the behavior of the glass transition temperatures and with the microscopy study which indicate that compatibility is greater in the PMMA‐1/PS blends having the low molecular weight of PMMA than in the PMMA‐3/PS blends having the higher molecular weights of PMMA.