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Structure of heat-treated Nylon 6 and 6.6 fibers. II. Recrystallization mechanism
1998; Wiley; Volume: 68; Issue: 3 Linguagem: Inglês
10.1002/(sici)1097-4628(19980418)68
ISSN1097-4628
AutoresAbigail Lisb�o Simal, Adriana Regina Martin,
Tópico(s)Polymer Nanocomposites and Properties
ResumoJournal of Applied Polymer ScienceVolume 68, Issue 3 p. 453-474 Structure of heat-treated Nylon 6 and 6.6 fibers. II. Recrystallization mechanism Abigail Lisbão Simal, Corresponding Author Abigail Lisbão Simal Departamento de Engenharia de Materiais, Universidade Federal de São Carlos, Via Washington Luiz, Km. 235, Caixa Postal 676, 13565-905 São Carlos, SP, BrazilDepartamento de Engenharia de Materiais, Universidade Federal de São Carlos, Via Washington Luiz, Km. 235, Caixa Postal 676, 13565-905 São Carlos, SP, Brazil===Search for more papers by this authorAdriana Regina Martin, Adriana Regina Martin Departamento de Engenharia de Materiais, Universidade Federal de São Carlos, Via Washington Luiz, Km. 235, Caixa Postal 676, 13565-905 São Carlos, SP, BrazilSearch for more papers by this author Abigail Lisbão Simal, Corresponding Author Abigail Lisbão Simal Departamento de Engenharia de Materiais, Universidade Federal de São Carlos, Via Washington Luiz, Km. 235, Caixa Postal 676, 13565-905 São Carlos, SP, BrazilDepartamento de Engenharia de Materiais, Universidade Federal de São Carlos, Via Washington Luiz, Km. 235, Caixa Postal 676, 13565-905 São Carlos, SP, Brazil===Search for more papers by this authorAdriana Regina Martin, Adriana Regina Martin Departamento de Engenharia de Materiais, Universidade Federal de São Carlos, Via Washington Luiz, Km. 235, Caixa Postal 676, 13565-905 São Carlos, SP, BrazilSearch for more papers by this author First published: 07 December 1998 https://doi.org/10.1002/(SICI)1097-4628(19980418)68:3 3.0.CO;2-WCitations: 22AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat Abstract The present work compared the recrystallization process of Nylon 6 with Nylon 6.6 fibers. For such a study, the fibers were submitted to different annealing conditions (slack and restrained conditions) in a wide range of temperatures. For the structural analysis, several techniques were applied, and among them, differential scanning calorimetry (DSC) was demonstrated to be a very important tool. Nylon 6 and 6.6 fibers responded differently to the applied annealings, indicating different recrystallization mechanisms. The Nylon 6 fiber presented the formation of new and very small crystallites in their interfibrillar regions for the annealings performed above 120°C independently of the annealing condition. In addition to their improvement in size and perfection as the annealing temperature increases, their presence favored a general recrystallization in a preferred direction, that is, of the fiber axis. The recrystallization process of the Nylon 6.6 was commanded by the disorientation process associated to the release of the hydrogen bonds. The DSC thermograms revealed two crystalline forms, that is, of the same type but with different degrees of size and perfection. At temperatures below the Tg, the less perfect crystallites are converted into more perfect ones, while at temperatures above the Tg, the intense movement of the chain segments favored a reversal in this process, that is, the more perfect ones are converted again to the less perfect form. © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 68: 453–474, 1998 Citing Literature Volume68, Issue318 April 1998Pages 453-474 RelatedInformation
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