Microscopic theory of the structure, thermodynamics, and apparentχparameter of polymer blends
- 29 February 1988
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 60 (9), 809-812
- https://doi.org/10.1103/physrevlett.60.809
Abstract
A general off-lattice microscopic theory of the equilibrium properties of polymer mixtures is developed based on reference interaction site model integral equation methods. A derivation of a random-phase-approximation–like scattering function is presented along with a fully microscopic, general formula for the effective χ parameter measured in small-angle neutron-scattering experiments. Numerical results for χ of an athermal, Gaussian-chain–polymer binary blend are presented as a function of concentration, packing fraction, molecular weight, and structural asymmetry.Keywords
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