Zobrazeno 1 - 9 of 9 pro vyhledávání: '"H. L. DOPPERT"'
1
Structure and rheology of aramid solutions: transient rheological and rheooptical measurements
Autor: J. Aerts, Stephen J. Picken, H. L. Doppert, A. J. Reuvers, M. G. Northolt
Publikováno v: Macromolecules. 24:1366-1375
Etude de la phase nematique lyotrope du poly(p-phenylene terephtalamide) et du poly(4,4'-benzanilidylene terephtalamide) en solution concentree dans l'acide sulfurique. Les variations de structure des solutions pendant le demarrage d'un ecoulement ci
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c0f1706a84e316f41885c5d3c129ede6
https://doi.org/10.1021/ma00006a023
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2
A semiempiric model for establishing the drawability of solution-spun linear polyamides and other flexible chain polymers
Autor: G. J. H. Vos, J. Smook, H. L. Doppert
Publikováno v: Journal of Applied Polymer Science. 41:105-116
A series of high molecular weight, linear polyamide samples have been subjected to various solution spinning techniques, such as gel, wet, and dry spinning, in an attempt to produce high-tenacity filaments. The spinning experiments involved polyamide
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b2f285f95372a8062a7aa3072a3eee51
https://doi.org/10.1002/app.1990.070410109
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3
Stirring-induced solution crystallization of ultra high molecular weight polyamide 6
Autor: H. L. Doppert, J. G. Van Dijk
Publikováno v: Journal of Applied Polymer Science. 36:1177-1189
Unstable solutions of ultrahigh molecular weight polyamide 6 have been prepared by adding a nonsolvent to the polymer solution. Crystallization of the polyamide from such a solution proceeds very slowly. It has been found, however, that vigorous stir
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b3115e78a68fe4cd206f96f32200017e
https://doi.org/10.1002/app.1988.070360518
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4
Rheological Properties of Aramid Solutions: Transient Flow and Rheo-Optical Measurements
Autor: H. L. Doppert, S. J. Picken
Publikováno v: Molecular Crystals and Liquid Crystals Incorporating Nonlinear Optics. 153:109-116
The rheological properties of a 20% (w/w) solution of poly-para-phenylene-therephthalamide (PpPTA) in concentrated sulfuric acid have been investigated using a Contraves Rheomat 135S and a device that allows microscopic investigation of the solution
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e27d0119f669886226c4a485e2a0c256
https://doi.org/10.1080/00268948708074529
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5
Kinetics of amylose retrogradation
Autor: H. L. Doppert, A. J. Staverman
Publikováno v: Journal of Polymer Science Part A-1: Polymer Chemistry. 4:2353-2366
This article deals with the kinetics of the retrogradation of amylose in aqueous solutions of pH 4.0, 9.2, and 11.9. The course of the retrogradation is followed by means of light-scattering measurements. From our interpretation of the light-scatteri
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5e1d90b7ca2c7eab6c614047b9835ac9
https://doi.org/10.1002/pol.1966.150041001
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6
The influence of the stretch ratio on the rate of diffusion in a wet-spinning process
Autor: H. L. Doppert, G. J. Harmsen
Publikováno v: Journal of Applied Polymer Science. 17:893-903
This article describes diffusion experiments on a single filament spinning set. The aim was to find phenomena which may occur in any wet-spinning process. An alkaline poly(vinyl alcohol) solution containing an indicator was spun out into a coagulatio
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::84aa584219fb6e6c6c7067595b7acbd6
https://doi.org/10.1002/app.1973.070170319
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7
Polyelectrolytic character of amylose. II
Autor: H. L. Doppert, A. J. Staverman
Publikováno v: Journal of Polymer Science Part A-1: Polymer Chemistry. 4:2373-2379
Viscometric titrations of amylose are described. The curves confirm the earlier results of Rao and Foster. A more quantitative consideration is given concerning the changes of the electrostatic charge of the amylose molecules in the pH range of 11–
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a423d75192c3a0bd5511df5bf9177dee
https://doi.org/10.1002/pol.1966.150041003
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