Effect of Temperature History upon Stability and Melting of Poly(ethylene oxide)

[img]PDF - Authorized users only
Language: English
784Kb
Title:Effect of Temperature History upon Stability and Melting of Poly(ethylene oxide)
Creators:
Sikora, Antonín
Porsch, Bedřich
Pouchlý, Julius
Journal or Publication Title:
Collection of Czechoslovak Chemical Communications, 58, 11, pp. 2595-2604

Abstract

The effect of temperature history upon the distribution of molecular weights and melting points has been investigated with high-molecular poly(ethylene oxides). The results obtained by the size exclusion chromatography (SEC) and differential scanning calorimetry (DSC) have shown that a long-term annealing of high-molecular poly(ethylene oxides) results in a distinct degradation of polymeric chains. The change in distribution of molecular weights and the presence of oligomers formed by degradation markedly affect the melting points of poly(ethylene oxide). The diffusion of oligomers from crystalline into amorphous regions is manifested by a time change of melting point and crystallinity degree of poly(ethylene oxide). The degradation is also observed during X-ray measurements.

Title:Effect of Temperature History upon Stability and Melting of Poly(ethylene oxide)
Creators:
Sikora, Antonín
Porsch, Bedřich
Pouchlý, Julius
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:58
Number:11
Page Range:pp. 2595-2604
ISSN:0010-0765
E-ISSN:1212-6950
Publisher:Institute of Organic Chemistry and Biochemistry
Related URLs:
URLURL Type
http://dx.doi.org/10.1135/cccc19932595UNSPECIFIED
ID Code:376
Item Type:Article
Deposited On:06 Feb 2009 17:00
Last Modified:06 Feb 2009 16:00

Citation

Sikora, Antonín; Porsch, Bedřich; Pouchlý, Julius (1993) Effect of Temperature History upon Stability and Melting of Poly(ethylene oxide). Collection of Czechoslovak Chemical Communications, 58 (11). pp. 2595-2604. ISSN 0010-0765

Repository Staff Only: item control page