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Polymer blends of stereoregular poly(methyl methacrylate) and poly(styrene-co-p-hydroxystyrene)

โœ Scribed by Wen-Ping Hsu; Ching-Fen Yeh


Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
291 KB
Volume
73
Category
Article
ISSN
0021-8995

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โœฆ Synopsis


Isotactic, atactic, and syndiotactic poly(methyl methacrylates) (PMMAs) (designated as iPMMA, aPMMA, and sPMMA) were mixed with poly(styrene-co-phydroxystyrene) (abbreviated as PHS) containing 15 mol % of hydroxystyrene separately in 2-butanone to make three polymer blend systems. Differential scanning calorimetry (DSC) and Fourier transform infrared (FTIR) spectroscopy were used to study the miscibility of these blends. The three polymer blends were found to be miscible, because all the prepared films were transparent and there was a single glass transition temperature (T g ) for each composition of the polymers. T g elevation (above the additivity rule) is observed in all the three PMMA/PHS blends mainly because of hydrogen bonding. If less effective hydrogen bonding based on the FTIR evidence is assumed to infer less exothermic mixing, sPMMA may not be miscible with PHS over a broader range of conditions as iPMMA and aPMMA.


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Miscibility of polymer blends of poly(st
โœ Guangxian Li; J. M. G. Cowie; V. Arrighi ๐Ÿ“‚ Article ๐Ÿ“… 1999 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 181 KB ๐Ÿ‘ 2 views

The miscibility of blends of bisphenol-A polycarbonate (BAPC) and tetramethyl bisphenol-A polycarbonate (TMPC) with copolymers of poly(styrene-co-4-hydroxystyrene) (PSHS) was studied in this work. It has been demonstrated that BAPC is miscible with PSHS over a region of approximately 45-75 mol % hyd