The adsorbent was silica gel, the developer was based on a mixture of 2-butanone and water, and the spots were visualised with iodine vapour, and then evaluated with the aid of an optical densitometer. This method permitted the quantitative fractionation of polyethylene glycols with degrees of ...
Molecular weight determinations of polyamides by N-trifluoroacetylation By N-trifluoroacetylation (TFA) polyamides become soluble in ordinary organic solvents such as acetone, butanone, methylene chloride, chloroform and tetrah... K Weisskopf,G Meyerhoff - 《Polymer》 被引量: 60发表: 1983年 Molecula...
The effects of the degree of polymerization (DP) and solvents on the rate of intra- and inter-macromolecular quenching of triplet anthryl groups bound to polystyrene have been studied from the decay of delayed fluorescence in butanone at 30°C and cyclohexane at 40°C using a 10 ns nitrogen ...
42 The Ge crystal of the ATR unit was cleaned before each background or sample measurements first with 2-butanone (99.5%, Merck) and then 30 min in the UV-ozone cleaner to remove any organic residues. After mounting the Ge crystal back to the ATR unit, the unit was purged for 15...
JP51119088 October, 1976 METHOD FOR PREPARING A LOW MOLECULAR WEIGHT CELLULOSE ESTER JP51119089 October, 1976 METHOD FOR PREPARING A LOW MOLECULAR WEIGHT CELLULOSE MIXED ESTER WO/1982/002719 August, 1982 ACRYLIC COATING COMPOSITIONS WO/1991/016356 October, 1991 PREPARATION OF LOW MOLECULAR WEIGHT CELLU...
The rate of the viscosity reduction of VES solution decreases as the molecular weight of hydrocarbon increases. select article Molecular interactions of food additive dye quinoline yellow (Qy) with alpha-lactalbumin: Spectroscopic and computational studies Research articleAbstract only Molecular interactions ...
structure (organic substancesNo abstract is available for this article.doi:10.1002/chin.197833074Anderson, Oren P.Marshall, J. C.WILEY‐VCH Verlag GmbHChemischer InformationsdienstAnderson OP, Marshall JC (1978) Inorg Chem 17: 1258
Ethanol has two carbon atoms bonded to each other, one of which is bonded to an alcohol group (-OH). The structure of ethanol is given below. Me... Learn more about this topic: Ethanol | History, Structure & Formula from Chapter 2/ Lesson 8 ...
The paper is concerned with light scattering studies on solutions of ultrahigh molecular weight random copolymers of methyl methacrylate and styrene (50:50 mol/mol). The dependence of the radius of gyration and of the second virial coefficient on the weight-average molecular weight of the copolymers...
∫ (r) dr 0 (3.6) 90 Conformation, Solutions, and Molecular Weight Chapter 3 Substitution of the radial distribution function (eq. 3.5) into eq. 3.6 and evaluating the inte- gral gives the mean-square end-to-end distance of the freely jointed and volumeless chain as r 2 = nl2 . (...