Melting and Crystallization of Poly(oxyethylene) Mixtures

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Title:Melting and Crystallization of Poly(oxyethylene) Mixtures
Creators:
Lapeš, Ivo
Baldrian, Josef
Biroš, Ján
Pouchlý, Julius
Mio, Hanes
Journal or Publication Title:
Collection of Czechoslovak Chemical Communications, 60, 11, pp. 1855-1868

Abstract

<p>Solid-liquid eutectic phase diagrams of mixtures of poly(oxyethylene) (M.w. 2 000) with hydroxy and methoxy endgroups, crystallizing in extended-chain macroconformation only, with glutaric acid, benzoic acid or 1,2-diphenylethane are given. The composition dependence of the melting temperature can be fitted by the Flory-Huggins equation. Interaction parameters X and interaction energy densities <i>B</i> evaluated from the diluent branch of the phase diagram are consistent with those obtained from the polymer branch provided the calorimetric value of enthalpy of polymer fusion is used in the latter computation. Measurements of small- and wide-angle X-ray scatterings showed a stacked lamellar structure of POE. Below the eutectic melting point, the long period of the polymer is almost independent of the diluent concentration. On raising temperature gradually from this melting point to the melting point of pure polymer, the increasing long period indicates the penetration of the diluent between the lamellae. As follows from SAXS measurements, the crystallinity of poly(oxyethylene) in the mixtures remains unchanged compared to that of the pure polymer.

Title:Melting and Crystallization of Poly(oxyethylene) Mixtures
Creators:
Lapeš, Ivo
Baldrian, Josef
Biroš, Ján
Pouchlý, Julius
Mio, Hanes
Divisions:Life and Chemical Sciences > Institute of Organic Chemistry and Biochemistry > Collection of Czechoslovak Chemical Communications
Journal or Publication Title:Collection of Czechoslovak Chemical Communications
Volume:60
Number:11
Page Range:pp. 1855-1868
ISSN:0010-0765
E-ISSN:1212-6950
Publisher:Institute of Organic Chemistry and Biochemistry
Related URLs:
URLURL Type
http://dx.doi.org/10.1135/cccc19951855UNSPECIFIED
ID Code:875
Item Type:Article
Deposited On:06 Feb 2009 17:04
Last Modified:06 Feb 2009 16:04

Citation

Lapeš, Ivo; Baldrian, Josef; Biroš, Ján; Pouchlý, Julius; Mio, Hanes (1995) Melting and Crystallization of Poly(oxyethylene) Mixtures. Collection of Czechoslovak Chemical Communications, 60 (11). pp. 1855-1868. ISSN 0010-0765

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