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Lower critical solution temperatures of poly(decyl methacrylate) in hydrocarbons

✍ Scribed by E. Maderek; G.V. Schulz; B.A. Wolf

Publisher
Elsevier Science
Year
1983
Tongue
English
Weight
209 KB
Volume
19
Category
Article
ISSN
0014-3057

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✦ Synopsis

The high temperature demixing of solutions of poly(decyl methacrylate) (PDMA) was measured as a function of pressure for the following solvents: n-pentane, cyclo-pentane, n-hexane, n-heptane, iso-octane and toluene. In all cases the application of pressure increases the miscibility in the order of 0.4-1.0 K/bar. The lower critical solution temperatures extrapolated to atmospheric conditions range from 155 (n-pentane) to 261Β°C (toluene); no phase separation could be observed with the base oil AF 1 of Schindler up to 370Β°C. Noticeable thermal degradation of the polymer sets in when the solutions are heated above ca. 300Β°C.

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