Výsledky vyhledávání - "Jacques Beaumais"

Effect of nonelectrostatic interactions on the macromolecular behavior of polyelectrolyes. II. Influence of urea and dyes on the viscometric and optical behavior of PLL

Autor: Jacques Beaumais, Eric Selegny, J. C. Fenyo, Guy Muller

Publikováno v: Journal of Polymer Science: Polymer Chemistry Edition. 12:2671-2682

The effect of urea and of dyes on the viscometric behavior of aqueous solutions of PLL has been investigated. The compact structure, which is characteristic of PLL in pure water, is found to disappear progressively as the amount of urea is increased.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::29686fa2d4a9d9e553faefbbbe896bf7
https://doi.org/10.1002/pol.1974.170121121

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Effect of polyion conformation on dye binding. V. Induced optical activity of acridine orange bound to a synthetic nonstereoregular polyelectrolyte

Autor: J. C. Fenyo, Guy Muller, Jacques Beaumais

Publikováno v: Journal of Polymer Science: Polymer Chemistry Edition. 18:1367-1373

It is shown that the induced Cotton effects in the visible region of the absorption bands of acridine orange in the presence of a nonstereoregular α-carboxylic polysulfonamide (PLL) can be attributed to stacked bound dye molecules, irrespective of t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::385a2c32b0714152eaf86b59204336d9
https://doi.org/10.1002/pol.1980.170180420

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Effect of nonelectrostatic interactions on the macromolecular behavior of polyelectrolytes. I. Potentiometric titrations of PLL in water and aqueous–organic mixtures

Autor: J. C. Fenyo, Jacques Beaumais, Eric Selegny

Publikováno v: Journal of Polymer Science: Polymer Chemistry Edition. 12:2659-2670

The potentiometric and viscosity behavior of salt-free solutions of the polycondensate between L-lysine and 1,3-benzenedisulfonyl chloride (PLL) and related polyelectrolytes, have been investigated in water and in aqueous–organic mixtures (acetone�

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::311047a203ca4a7d0589c1bbb48b0209
https://doi.org/10.1002/pol.1974.170121120

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Effect of nonelectrostatic interactions on the macromolecular behavior of polyelectrolytes. III. Optical rotatory dispersion of PLL in water and aqueous-organic mixtures

Autor: J. C. Fenyo, Guy Muller, Jacques Beaumais

Publikováno v: Journal of Polymer Science: Polymer Chemistry Edition. 13:2305-2318

We have investigated the optical rotatory dispersion of a stereo-irregular polyelectrolyte when neutralized with alkaline and N-tetraalkylammonium hydroxides, both in water and aqueousacetone mixtures. The variations of the optical activity propertie

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1b1b186c17803a6f2c9f8e9f8103797e
https://doi.org/10.1002/pol.1975.170131012

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[Untitled]

Autor: Eric Selegny, Michel Vert, Jacques Beaumais

Publikováno v: Die Makromolekulare Chemie. 165:17-29

Les polymeres du titre sont prepares par polycondensation en milieu acide (Pa) et en milieu alcalin (Pb) du formaldehyde avec les monomeres phenoliques optiquement actifs N-benzoyl L-tyrosine (TyB) et N-(p-hydroxyphenylsulfonyl)-L-phenylalanine (PhHP

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::fd6f3b554a0cde2aaa6a9b4138b0cbc4
https://doi.org/10.1002/macp.1973.021650103

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Polymères optiquement actifs. (V) Isoméries conformationnelles induites sous l’influence du milieu réactionnel pour des polycondensats formo-phénoliques

Autor: Eric Selegny, Tran-Cong Ngon, Michel Vert, Jacques Beaumais

Publikováno v: Journal de Chimie Physique. 65:140-145

Le formaldehyde et des enantiomeres de divers phenols p-substitues portant des fonctions acides faibles ont ete poly- condenses, soit en milieu acide (associant), soit basique (ionisant).Les couples de polyelectrolytes obtenus ont des proprietes chim

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8d0ff41ee32c25987f070c1a1fda34a4
https://doi.org/10.1051/jcp/1968650140

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Polysulfonamides optiquement actifs. Synthese des polycondensats de la l-lysine et du disulfochlorure-1,3 benzene. Proprietes polyelectrolytiques. Chelation des ions Cu(II)

Autor: Jacques Beaumais, Eric Selegny, J. C. Fenyo

Publikováno v: European Polymer Journal. 9:15-26

Resume Nous avons elargi la synthese de polycondensats entre le disulfochlorure-1,3 benzene et une diamine lorsque celle-ci est un amino-acide. L'exemple decrit est celui de la l-lysine . Pour que la polycondensation soit possible, il est necessaire

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3b45c7c09ba20d7182747c8240878a90
https://doi.org/10.1016/0014-3057(73)90064-5

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Molecular weight determination of an optically active polysulfonamide (PLL) synthetized by interfacial polycondensation

Autor: J. C. Fenyo, Guy Muller, Jacques Beaumais

Publikováno v: Polymer Bulletin. 2

In order to study their molecular weight, optically active polysulfonamides were investigated by light scattering and viscosity measurements. The corresponding MARK-HOUWINK type relation is established.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b368766f395605b077e1efce849a4255
https://doi.org/10.1007/bf00254883

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