S. Florian et al., Unperturbed characteristics of atactic polypropylene: Some new theta solvents based on aliphatic ketones, J MACR S PU, A36(11), 1999, pp. 1771-1781
Citations number
25
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
JOURNAL OF MACROMOLECULAR SCIENCE-PURE AND APPLIED CHEMISTRY
Solution properties of atactic polypropylene were studied in thermodynamica
lly good solvents (toluene, n-butyl chloride and decalin) and in theta solv
ents (ethyl-n-butyl ketone, methyl-n-hexyl ketone, 1-nonanol and 2-ethylhex
anol). Mark-Houwink-Sakurada relations within the temperature range between
15 degrees C and 60 degrees C, unperturbed dimensions K-theta = 1.62 x 10(
-3) at T-theta = 19.7 degrees C in methyl-n-hexyl ketone (the K-theta and T
-theta values for ethyl-n-butyl ketone are the same) and the temperature co
efficient of unperturbed dimensions d In r(0)(-2)/dT = -2.44x10(-3)K(-1) we
re established.