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Title: Migration of additive molecules in a polymer filament obtained by melt spinning: Influence of the fiber processing steps

The purpose of this study is to understand the influence of the yarn processing on the migration of additives molecules, especially insecticide, within polyethylene (PE) yarns. Yarns were manufactured in the laboratory focusing on three key-steps (spinning, post-stretching and heat-setting). Influence of each step on yarn properties was investigated using tensile tests, differential scanning calorimetry and wide-angle X-ray diffraction. The post-stretching step was proved to be critical in defining yarn mechanical and structural properties. Although a first orientation of polyethylene crystals was induced during spinning, the optimal orientation was only reached by post-stretching. The results also showed that the heat-setting did not significantly change these properties. The presence of additives crystals at the yarn surface was evidenced by scanning-electron microscopy. These studies performed at each yarn production step allowed a detailed analysis of the additives’ ability to migrate. It is concluded that while post-stretching decreased the migration rate, heat-setting seems to boost this migration.
Authors:
 [1] ;  [2] ;  [3] ; ;  [1]
  1. Ingénierie des Matériaux Polymères - UMR CNRS 5223, Université de Lyon - Université Lyon 1, Bâtiment POLYTECH Lyon - 15 boulevard Latarjet, 69622, Villeurbanne (France)
  2. (France)
  3. Intelligent Insect Control, 118 Chemin des Alouettes, Castelnau-le-Lez, 34170 (France)
Publication Date:
OSTI Identifier:
22494360
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1695; Journal Issue: 1; Conference: GT70 international conference on polymer processing with resulting morphology and properties: Feet in the present and eyes at the future, Salerno (Italy), 15-17 Oct 2015; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ADDITIVES; CALORIMETRY; CRYSTALS; FIBERS; FILAMENTS; HEAT; INSECTICIDES; MECHANICAL TESTS; MIGRATION; MOLECULES; POLYETHYLENES; PROCESSING; SCANNING ELECTRON MICROSCOPY; SURFACES; TENSILE PROPERTIES; X-RAY DIFFRACTION