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PMMA/PC Blends: Effect of Mixing Conditions on Compatibility
Author(s) -
Penco Maurizio,
Sartore Luciana,
Sciucca Stefania Della,
Di Landro Luca,
D'Amore Alberto
Publication year - 2007
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200750129
Subject(s) - miscibility , polycarbonate , materials science , differential scanning calorimetry , scanning electron microscope , homogeneity (statistics) , methyl methacrylate , compatibility (geochemistry) , composite material , chemical engineering , polymer chemistry , polymer , polymerization , thermodynamics , statistics , physics , mathematics , engineering
In this work the effect of melt mixing condition and of a trans ‐esterification catalyst on miscibility of poly(methyl methacrylate) (PMMA)/polycarbonate of bisphenol A (PC) blends is studied. In particular, at high temperature chemical reactions between PMMA and PC phases can take place; these strongly change the compatibility in the blend and materials having single T g can be obtained. FT‐IR analyses, coupled with solvent extraction, suggest that a grafting reaction of PC on PMMA is involved. SEC and DSC data are consistent with spectroscopic results, and some decrement of the molar weight distribution (MWD) of PC phase is observed. On the other hand, the presence of a fraction of modified material having higher MWD of starting PMMA is also noticed. The single T g characteristic of some materials has been confirmed by experimental data of structural relaxation performed by differential scanning calorimetry (DSC). These materials showed optical clarity and the morphological analysis performed by scanning electron microscopy (SEM) confirm the homogeneity of these materials.