The structure and thermodynamics of energetically and structurally asymmetric polymer blends
- Department of Materials and Metallurgical Engineering, New Mexico Institute of Mining and Technology, Socorro, New Mexico 87801 (United States)
- Sandia National Laboratories, Albuquerque, New Mexico 87185 (United States)
Simple polymer blends were studied by simulations with the intent of probing the response of structurally asymmetric chains to progressively stronger attractive interactions strengths. It was found, for miscible blends, that the intermolecular pair correlation functions, the g(r){close_quote}s, varied by less than 10{percent} from those of the associated blend with strictly repulsive interactions. When used for the purposes of calculating changes in pressure due to the attractive strength, the g(r){close_quote}s from either the repulsive or attractive systems could be used interchangeably in the perturbation theory. On the other hand, calculations of the enthalpic {chi} parameter were sensitive to small variations in the g(r){close_quote}s, although, at least for the systems studied here, the associated predictions of the phase boundaries were relatively insensitive. {copyright} {ital 1998 American Institute of Physics.}
- OSTI ID:
- 636146
- Journal Information:
- Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 2 Vol. 109; ISSN JCPSA6; ISSN 0021-9606
- Country of Publication:
- United States
- Language:
- English
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