ISSN:
0098-1273
Keywords:
Physics
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
Thermodynamic interaction parameters have been calculated from gas-liquid chromatographic measurements for linear and branched polyethylene interacting with selected hydrocarbons. The values of the interaction parameter χ are substantial in spite of chemical similarities between the polymer and low molecular weight hydrocarbon species, a fact attributed to significant differences in the respective thermal expansion coefficients. A systematic increase of χ is observed in going from branched to linear polyethylene systems. The thermal expansion coefficients of these polymer homologs therefore may not be identical. The present χ values differ substantially from those reported in earlier literature. The comparison confirms suspicions that some older data, based on equilibrium sorption experiments, were erroneously low because of an underestimate in the reduced melting temperature of polymer in the presence of excess solvent.
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pol.1973.180110102
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