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Structure of heat‐treated nylon 6 fibers. I. Application of the arrhenius equation
Author(s) -
De Godoy Oriani Luis Alberto,
Simal Abigail Lisbão
Publication year - 1992
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1992.070461110
Subject(s) - crystallinity , arrhenius equation , shrinkage , activation energy , materials science , thermodynamics , atmospheric temperature range , crystal (programming language) , linearity , arrhenius plot , composite material , polymer chemistry , chemistry , physics , quantum mechanics , computer science , programming language
The changes in lateral order, crystalline perfection index, crystallinity percentage, long period, and shrinkage denote the structural modification due to thermal effects in the heat‐treated nylon 6 fibers. The application of the Arrhenius equation to these parameters resulted in two types of behavior: the parameters long period and shrinkage showed linearity in the temperature range of 100–190°C, while the others presented linearity between 150 and 190°C. The first reflects the direct dependence of crystal growth on shrinkage and the latter shows that the necessary energy to promote significant crystal growth and perfection will be reached only at 150°C. In the range of temperature from 100 to 150°C the observed increase of crystallinity is associated to chain flexibility allowing rearrangement as well as new crystal formation. This phenomenon seems to be related to the discontinuity observed in the Arrhenius plots in the same range of temperature. © 1992 John Wiley & Sons, Inc.