Abstract
Expressions are derived for the isothermal bulk modulus BT and Anderson–Grüneisen parameter δ for a simple two-dimensional bundle-of-chains model where parallel nearest-neighbor chains are assumed to interact with a simple separation-dependent potential. Bulk modulus data for general linear polymers are examined and shown to be essentially temperature independent at constant volume in accord with the model. The theory is shown to predict quite accurately for reasonable assumed pair potentials both BT and δ of high-density polyethylene and n-paraffins with no adjustable parameters. The values of δ obtained for polyethylene from BT data are in excellent agreement with those reported from ultrasonic data. The analysis is also shown to provide a sensitive measure of the form of the effective chain pair potential near its minimum. Also, a close relationship between δ and the Grüneisen constant γ is derived for this model.
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Dates
Type | When |
---|---|
Created | 21 years, 6 months ago (Feb. 6, 2004, 2:23 p.m.) |
Deposited | 1 year, 6 months ago (Feb. 9, 2024, 1:52 a.m.) |
Indexed | 11 months, 3 weeks ago (Sept. 7, 2024, 9:57 p.m.) |
Issued | 55 years, 4 months ago (April 1, 1970) |
Published | 55 years, 4 months ago (April 1, 1970) |
Published Print | 55 years, 4 months ago (April 1, 1970) |
@article{Broadhurst_1970, title={Bulk Modulus and Grüneisen Parameters for Linear Polymers}, volume={52}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.1673537}, DOI={10.1063/1.1673537}, number={7}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Broadhurst, M. G. and Mopsik, F. I.}, year={1970}, month=apr, pages={3634–3641} }