Investigation of Melting Behaviors and Crystallinity of Linear Polyamide with High-Aliphatic Content
Document Type
Article
Publication Date
1-5-2012
School
Polymer Science and Engineering
Abstract
The melting behaviors and crystal structures of a long alkyl chain polyamide and nylon 18 18, were investigated under annealing and isothermal crystallization conditions. Nylon 18 18 showed multiple melting peaks in differential scanning calorimetry (DSC) thermograms depending on thermal history of the samples. The origin of the multiple melting peaks may be a result of a melting and recrystallization mechanism during DSC scans. Wide-angle X-ray diffraction patterns showed two new diffraction peaks, which appeared at 0.44 and 0.37 nm, and are characteristic peaks of α-form (triclinic structure) of even-even nylons with increasing annealing temperature. The intensities of these peaks increased, and they split further apart, with elevated annealing temperatures. The solid-state 15N CP/MAS NMR spectra of the nylon 18 18 samples that had been quenched and annealed also confirmed the α-crystalline form. © 2011 Wiley Periodicals, Inc.
Publication Title
Journal of Applied Polymer Science
Volume
123
Issue
1
First Page
92
Last Page
98
Recommended Citation
Kaya, E.,
Mathias, L. J.
(2012). Investigation of Melting Behaviors and Crystallinity of Linear Polyamide with High-Aliphatic Content. Journal of Applied Polymer Science, 123(1), 92-98.
Available at: https://aquila.usm.edu/fac_pubs/50
Comments
Originally published in Journal of Applied Polymer Science, Volume 123, Issue 1, 5 January 2012, Pages 92-98
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