Application of small system thermodynamics to polymer molecules. II. Secondary nucleation
作者:
P. H. Lindenmeyer,
H. Beumer,
R. Hosemann,
期刊:
Polymer Engineering&Science
(WILEY Available online 1979)
卷期:
Volume 19,
issue 1
页码: 45-50
ISSN:0032-3888
年代: 1979
DOI:10.1002/pen.760190108
出版商: Society of Plastics Engineers, Inc.
数据来源: WILEY
摘要:
AbstractStatistical mechanical methods can be used to relate not only structure and thermodynamics but also structure and kinetics. Methods are developed for calculating the crystal growth rate kinetic models. When the usual macroscopic thermodynamics are applied, the resulting surface energies, σ and σeextracted from the experimental growth rates are quite comparable to those obtained from kinetic models. However, when one applies small system thermodynamics, a substantially smaller σ is obtained. This latter assumption has the advantage of explaining why extended chain seed crystals do not promote crystal growth and why folded chain crystals grow on such seeds. The statistical mechanical methods in both of these cases predict the observed decrease in the rate constant,Kgwith decreasing molecular length without the necessity of a separate theory for varying σewith molecular len
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