Determinations of consolute temperature of poly[styrene-ran-(butyl methacrylate)] solutions by simultaneous measurement of differential thermal analysis and laser transmittance

In order to study the phase equilibrium of copolymer solution, a differential thermal analysis instrument equipped with a laser, which allows the simultaneous measurement of thermal change via differential thermal analysis and optical property change via visible spectroscopy, was constructed. With t...

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Bibliographic Details
Published in:Macromolecules 1990-02, Vol.23 (4), p.1085-1088
Main Authors: KYOUMEN, M, BABA, Y, KAGEMOTO, A, BEATTY, C. L
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Properties and characterization
Solution and gel properties
Online Access:Get full text
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Summary:In order to study the phase equilibrium of copolymer solution, a differential thermal analysis instrument equipped with a laser, which allows the simultaneous measurement of thermal change via differential thermal analysis and optical property change via visible spectroscopy, was constructed. With this apparatus, the consolute temperatures of poly(styrene-ran-(butyl methacrylate)) having various styrene contents and its homopolymer/methyl ethyl ketone solutions were measured. From the results obtained, it was found that both the lower and upper critical solution temperatures exist in these systems. Graphs, Phase diagrams. 8 ref.--AA
ISSN:0024-9297
1520-5835
DOI:10.1021/ma00206a029