Spherulitic crystallization in blends of poly(ethylene oxide) and poly(methyl methacrylate)

The crystallization kinetics of binary blends of poly(ethylene oxide) and poly(methyl methacrylate) were investigated. The isothermal spherulitic growth rates were measured by means of a polarized light microscope. The temperature and composition dependence on the growth rates have been analysed. Th...

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Bibliographic Details
Published in:Polymer (Guilford) 1982-01, Vol.23 (9), p.1322-1324
Main Authors: Calahorra, E., Cortazar, M., Guzmán, G.M.
Format: Article
Language:English
Subjects:
Crystallization
kinetics
poly(ethylene oxide)
poly(methyl methacrylate)
polymer-polymer mixtures
spherulitic growth rates
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Summary:The crystallization kinetics of binary blends of poly(ethylene oxide) and poly(methyl methacrylate) were investigated. The isothermal spherulitic growth rates were measured by means of a polarized light microscope. The temperature and composition dependence on the growth rates have been analysed. The temperature range studied was from 44° to 58°C. The introduction of poly(methyl methacrylate) into poly(ethylene oxide) resulted in a reduction of the spherulitic growth rate as the proportion of poly(methyl methacrylate) was increased from zero to 40% by weight. Results have been analysed using the theoretical equations of Boon and Azcue for the growth rate of polymer-diluent mixtures. The experimental results are in good agreement with this equation. The temperature coefficient is negative as is the case in the crystallization of bulk homopolymers.
ISSN:0032-3861
1873-2291
DOI:10.1016/0032-3861(82)90274-9