Premium
The influence of polymer structure and component ratios on blend miscibility
Author(s) -
Cowie John M. G.
Publication year - 1994
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.19940780104
Subject(s) - miscibility , component (thermodynamics) , polymer blend , materials science , polymer , polymer science , polymer chemistry , chemical engineering , thermodynamics , composite material , copolymer , physics , engineering
The mean field, rigid lattice treatment as applied to polymer mixtures has been used to estimate segment‐segment interaction parameters for a wide range of polymers. These parameters incorporate, without distinction, contributions from non‐combinatorial entropy effects, dispersion forces and any specific interactions that operate in the polymer blend. Thus while these parameters can be used to predict successfully the nature of the phases in untested polymer blends, structural effects may also play a role in determining miscibility, and these may have to be assessed individually. Examples of structural effects are described using chlorine‐containing polymers and blends of copolymers with an anhydride ring attached in two different ways to the polymer chain. The extension of binary interaction parameters to the prediction of phase behaviour in complex ternary copolymer blends and the effect on the phase behaviour of changing the component ratios in the blends, is also illustrated.