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Solution properties of block copolymers of styrene and methylmethacrylate—III: Configurational and thermodynamic parameters

✍ Scribed by J.R. Urwin; J.M. Stearne

Publisher
Elsevier Science
Year
1965
Tongue
English
Weight
447 KB
Volume
1
Category
Article
ISSN
0014-3057

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✦ Synopsis

Thermodynamic and contigurational parameters have been derived from data published previously and from some viscosity data presented here. There is evidence to suggest that the block copolymer molecule in dilute solution may be considered as a random coil and therefore that the usual dilute solution theories are applicable. Extra interactions in excess of those found in homopolymers are present and appear to be a function of the number of contacts between chemically different segments in the chain and the solvent used in the investigation. Intramolecular phase separation appears to exist in the unsolvated molecule, possibly as microcrystalline regions. This situation might also persist even in dilute solution with some solvents, but probably vanishes in good solvents for both types of segments.

* Parts I and II, see Ref.

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