Výsledky vyhledávání - "N. M. Kvasha"

Reverse-phase distributive and gel-chromatography of oligomers of poly-m-phenyleneisophthalamide

Autor: P. V. Smirnov, T. I. Podol'skaya, N. M. Kvasha, K. G. Khabarova, N. I. Kuz'min, A. S. Chegolya

Publikováno v: Fibre Chemistry. 23:250-253

Methods have been developed for separating and analyzing oligomers of poly-m-phenyleneisophthalamide having different functional end-groups using the methods of distribution and gel-permeation chromatography.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::29732f7b967af438dbdc10afc1fe75f0
https://doi.org/10.1007/bf00552630

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Identification and quantitative determination of low-molecular-weight compounds and precipitation and plasticizing baths, and the effect of monomer-and solvent-contamination on their composition

Autor: T. I. Podol'skaya, P. V. Smirnov, K. G. Khabarova, N. I. Kuz'min, N. M. Kvasha, A. S. Chegolya

Publikováno v: Fibre Chemistry. 23:371-374

Using the liquid-chromatography method, a selective procedure has been developed for the quantitative determination of low-molecular compounds in the precipitation bath and the plasticizing bath.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5f0226697f79676d80e72dd2f6e72708
https://doi.org/10.1007/bf00547620

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Side-reactions in the synthesis of poly-m-phenyleneisophthalamide

Autor: T. I. Podol'skaya, K. G. Khabarova, A. S. Chegolya, P. V. Smirnov, N. I. Kuz'min, N. M. Kvasha

Publikováno v: Fibre Chemistry. 23:253-256

The side reactions which occur during the process of poly-m-phenyleneisophthalamide synthesis have been investigated qualitatively and quantitatively by the liquid-chromatography method.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cf2e142fba00345877740f9ed9e7594a
https://doi.org/10.1007/bf00552631

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Effect of monomer and solvent quality on the molecular-weight characteristics of poly-m-phenylene isophthalamide

Autor: K. G. Khabarova, P. V. Smirnov, T. I. Podol'kaya, N. I. Kuz'min, N. M. Kvasha, A. S. Chegolya

Publikováno v: Fibre Chemistry. 24:9-12

A procedure has been developed for determining the molecular-weight distribution of poly-m-phenylene isophthalamide by the method of exclusion chromatography. The effect of contaminants in the isophthaloyl chloride and N,N-dimethyl acetamide on molec

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5f5fe7ce315c8b6fb357eb8ab7b355be
https://doi.org/10.1007/bf00557169

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Acidity and corrosivity of the volatile distillates in the synthesis of polyethylene terephthalate from dimethyl terephthalate and ethylene glycol

Autor: N. M. Kvasha, Z. K. Murzova, T. E. Golosova, V. G. Golubev, Z. K. Vasil'eva, Yu. S. Ignat'ev, L. A. Bolsun

Publikováno v: Fibre Chemistry. 20:93-96

The acidity and aggressive properties of volatile distillates in the synthesis of polyethylene terephthalate from ethylene glycol and dimethyl terephthalate have been studied on industrial technological lines. It has been shown that the acidity of th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0b02ffed8ada959baff27e5cd45ee892
https://doi.org/10.1007/bf00549237

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Determination of admixtures of isophthalic acid and monoisophthaloyl chloride in isophthaloyl chloride by liquid chromatography

Autor: P. V. Smirnov, T. I. Podol'skaya, N. M. Kvasha

Publikováno v: Fibre Chemistry. 20:294-297

A procedure has been developed for determining monoisophthaloyl chloride and isophthalic acid in isophthaloyl chloride. A regime for chromatographing on glass columns has been worked out.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::63bec92ce359a47dcedf367a0d9f49f9
https://doi.org/10.1007/bf00548823

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Transesterification of dimethyl terephthalate with ethylene glycol. A kinetic model of the process

Autor: P. V. Smirnov, V. V. Kiselev, N. M. Kvasha, É. M. Aizenshtein, L. P. Repina, N. S. Bunigina

Publikováno v: Fibre Chemistry. 15:404-408

The possibility of calculating and obtaining the values of the rate constants of reactions (4)–(6) in the process of transesterifying DMT with ethylene glycol over various catalytic systems at a 1.8 molar ratio of the starting components, EG:DMT, h

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::fffd5955a1b65d6081eb77202c99a03b
https://doi.org/10.1007/bf00544935

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Transesterification of dimethyl terephthalate with ethylene glycol

Autor: P. V. Smirnov, N. S. Bunigina, L. P. Repina, N. M. Kvasha, É. M. Aizenshtein, V. V. Kiselev

Publikováno v: Fibre Chemistry. 15:332-336

For the first time, data are given on the quantitative composition of the transesterification products of dimethyl terephthalate with ethylene glycol at various molar ratios of the starting materials.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b721c9e2dea36bd47ddd2b9393b6fc35
https://doi.org/10.1007/bf00548126

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Automatic potentiometric determination of the acid impurities in organic solvents

Autor: N. M. Kvasha, L. N. Bykova, V. V. Bogoslovskii, A. V. Novikov

Publikováno v: Fibre Chemistry. 10:503-506

In this article a description is given of an automatic potentiometric method of titrating the acids in DMAA and DMFA and in their mixtures with water. The method was developed by the present writers on T-105 titration apparatus which consists of a ti

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2c0f4d32a0c5107ea5ada8beebfdca87
https://doi.org/10.1007/bf00714846

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