Composition dependence of polymerization-induced phase separation of 2-chlorostyrene/polystyrene mixtures

Dynamics of phase separation induced by polymerization of 2-chlorostyrene in the presence of polystyrene was studied by an scanning electron microscope and a time-resolved light scattering instrument with varying initial monomer composition θ in the range from 0.4 to 0.6. Phase-separation rate incre...

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Bibliographic Details
Published in:Polymer (Guilford) 2004-05, Vol.45 (12), p.4315-4321
Main Authors: Okada, Mamoru, Inoue, Goro, Ikegami, Tomonori, Kimura, Kazuya, Furukawa, Hidemitsu
Format: Article
Language:English
Subjects:
Applied sciences
Electron microscopy
Exact sciences and technology
Morphology
Organic polymers
Physicochemistry of polymers
Polymerization
Polymerization-induced phase separation
Preparation, kinetics, thermodynamics, mechanism and catalysts
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Summary:Dynamics of phase separation induced by polymerization of 2-chlorostyrene in the presence of polystyrene was studied by an scanning electron microscope and a time-resolved light scattering instrument with varying initial monomer composition θ in the range from 0.4 to 0.6. Phase-separation rate increased with increasing θ or temperature. Phase being rich in poly(2-chlorostyrene) formed droplets initially and these droplets coagulated to form continuous domains at low temperatures. A maximum was found in the initial-composition dependence of the time when morphological change from droplets to continuous domains occurred. Qualitative discussion was made for the effects of initial composition change on morphological change of poly(2-chlorostyrene)-rich phase.
ISSN:0032-3861
1873-2291
DOI:10.1016/j.polymer.2004.03.086