DOI: 10.1063/1.1516591. Role of intramolecular energy on polyolefin miscibility: Isotactic polypropylene/polyethylene blends

Role of intramolecular energy on polyolefin miscibility: Isotactic polypropylene/polyethylene blends

10.1063/1.1516591

Crossref journal-article

AIP Publishing

The Journal of Chemical Physics (317)

Abstract

Self-consistent polymer reference interaction site model (PRISM) calculations and molecular dynamics (MD) simulations were performed for a blend of isotactic polypropylene (iPP) and polyethylene (PE) at various compositions and chain lengths. United atom models were used for both components. Both PRISM theory and MD simulations predicted that the change in intramolecular energy going from the melt to the blend for each species was a significant positive contribution to the total mixing energy. Furthermore, this intramolecular heat of mixing was dominated by the torsional and van der Waals contributions. Constant pressure MD simulations indicated that, with the united atom parameters used, the iPP/PE blend had essentially zero volume change of mixing. MD simulations were used to compute the partial structure factors for the blend and together with the standard random phase approximation analysis were used to estimate the small angle neutron scattering (SANS) χ parameter. Good agreement was found between estimates from PRISM and MD of both the enthalpic and SANS χ parameters.

Bibliography

Heine, D., Wu, D. T., Curro, J. G., & Grest, G. S. (2003). Role of intramolecular energy on polyolefin miscibility: Isotactic polypropylene/polyethylene blends. The Journal of Chemical Physics, 118(2), 914â924.

Authors 4

David Heine (first)
David T. Wu (additional)
John G. Curro (additional)
Gary S. Grest (additional)

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Dates

Type	When
Created	22 years, 8 months ago (Dec. 28, 2002, 11:52 a.m.)
Deposited	1 year, 6 months ago (Feb. 7, 2024, 12:18 p.m.)
Indexed	9 months, 1 week ago (Nov. 19, 2024, 10:46 a.m.)
Issued	22 years, 7 months ago (Jan. 8, 2003)
Published	22 years, 7 months ago (Jan. 8, 2003)
Published Print	22 years, 7 months ago (Jan. 8, 2003)

Funders 0

None

BibTeX

@article{Heine_2003, title={Role of intramolecular energy on polyolefin miscibility: Isotactic polypropylene/polyethylene blends}, volume={118}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.1516591}, DOI={10.1063/1.1516591}, number={2}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Heine, David and Wu, David T. and Curro, John G. and Grest, Gary S.}, year={2003}, month=jan, pages={914–924} }

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