Results 221 to 230 of about 52,278 (259)

Stabilization of polyamides—I. The efficiency of antioxidants in polyamide 6

Polymer Degradation and Stability, 1996
The influence of antioxidants on the thermooxidation of hydrolytically and anionically prepared polymers of 6-hexanelactam was studied. Oxygen consumption was followed during oxidations and the changes in molecular weight and in the content of carboxyl groups were evaluated.
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HALS in polyamide 6 polymerization

Macromolecular Symposia, 2003
AbstractThe use of Hindered Amine Light Stabilizers (HALS) directly in polyamide 6 polymerization can cause some problems. The following two problems were the focus of our project:1) We investigated, from a theoretical point of view, the results of introducing directly one of the precursors of HALS into polyamide 6 polymerization. For the investigation,
Roberto Filippini Fantoni, Giorgio Sanfilippo   +1 more
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Physical Properties of Polyblends of Polyamide 6 Polymer with Cationic Dyeable Polyamide 6 Polymer

Journal of Polymer Research, 2004
Polyamide 6 (PA 6) and cationic dyeable polyamide 6 (CD-PA 6) polymers were blended mechanically in the proportions of 75/25, 50/50, 25/75 in a melt twin-screw extruder to prepare three PA 6/CD-PA 6 polyblended polymers. The molar ratio of dimethyl 5-sulfoisophthalate sodium salt (SIPM) for CD-PA 6 polymer was 2%.
Wen-Chin Tsen, Yao-Chi Shu, Keven Hsiao, Zhi-Feng Jue   +3 more
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Reinforcement of Polyamide 6 with Nanoparticles

Macromolecular Symposia, 2007
AbstractPolyamide 6 has been reinforced by in situ polymerization of ε‐caprolactam by using either 2 wt % of multiwall carbon nanotubes of two different diameters and length or 2 wt % functionalized nonporous Stöber silica. The carbon nanotubes were synthesized by catalytic chemical vapor deposition of ethylene over two different supports: iron ...
Luis F. Giraldo, Mauricio Echeverri, Betty L. López   +2 more
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Microinjection molding of polyamide 6

Polymers for Advanced Technologies, 2014
Processing polymers by microinjection molding (μIM) generate specific constraints upon the polymer melt such as high shear stress and rapid cooling, leaving a mark upon the microstructure of the micropart. The present work compares the morphology and structure of polyamide 6 samples produced by melt extrusion and μIM.
Ferreira, Tânia, Lopes, P. E., Pontes, A. J., Paiva, M. C.   +3 more
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Fusion bonding of maleic anhydride grafted polypropylene–polyamide 6 blends to polyamide 6

Polymer, 1998
Keywords: Fusion bonding ; blends ; semi-crystalline polymers Reference LTC-ARTICLE-1998-003doi:10.1016/S0032-3861(98)00092-5View record in Web of Science URL: http://www.sciencedirect.com/science/journal/00323861 Record created on 2006-06-26, modified on 2016-08 ...
Jacques-Eric Bidaux, Gregory D. Smith, Jan-Anders E. Månson, Christopher J.G. Plummer, Jöns Hilborn   +4 more
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Crystallinity and polymorphism of 6‐polyamide

Die Makromolekulare Chemie, 1974
AbstractBy X‐ray diffraction and by density measurements as well as by differential scanning calorimetry, the crystallization phenomena of 6‐polyamide(nylon‐6) samples, obtained under different conditions were investigated.Particularly we have analyzed a method for the quantitative determination of the α, γ, and δ (amorphous) phases.
Giorgio Gurato, Annamaria Fichera, Francesco Zilio Grandi, Roberto Zannetti, Pietro Canal   +4 more
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Structure and properties of polyamide-6

Polymer Science U.S.S.R., 1985
Abstract A rule has been derived for determination of times of heat treatment necessary to attain pre-set degrees of crystallinity. The influence of the degree of crystallinity on the elastic modulus has been determined, using a composite model. The influence of the duration of heat treatment on the rigidity of the material has been established.
K.A. Moskatov, A.V. Odinokov
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New Insights into the Brill Transition in Polyamide 11 and Polyamide 6

Macromolecules, 2016
The thermal stability of several crystal polymorphs in polyamide 11 (PA11) and polyamide 6 (PA6) has been investigated by means of in situ X-ray experiments. In the case of PA11, δ′ and α′ phases display a Brill transition far below the melting point. Both phases transform into a (pseudo)-hexagonal HT δ phase above 100 °C.
Pepin, Julie, Miri, Valérie, Lefebvre, Jean-Marc   +2 more
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Continuous polyamidation of polyamide 6

Fibre Chemistry, 1995
E. Morf, W. Stibal
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