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  • Polymer and Materials Science  (9)
  • activity coefficient  (2)
  • 1
    Digitale Medien
    Digitale Medien
    Thermodynamics of electrolytes. X. Enthalpy and the effect of temperature on the activity coefficients (1978)
    Springer
    Journal of solution chemistry 7 (1978), S. 327-337 
    Details
    ISSN: 1572-8927
    Schlagwort(e): Enthalpy ; heat of dilution ; heat of solution ; activity coefficient ; electrolyte ; thermodynamics
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract Heat of dilution and of solution data are fitted to the form of equation corresponding to that used successfully for activity and osmotic coefficients over a wide range of concentrations. The resulting parameters give the change with temperature of the activity and osmotic coefficients. Results are reported for 84 electrolytes of 1-1, 2-1, 3-1, and 2-2 valence types.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00662893
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  • 2
    Digitale Medien
    Digitale Medien
    Thermodynamics of electrolytes. IX. Rare earth chlorides, nitrates, and perchlorates (1978)
    Springer
    Journal of solution chemistry 7 (1978), S. 45-56 
    Details
    ISSN: 1572-8927
    Schlagwort(e): Rare earth salts ; lanthanides ; osmotic coefficient ; activity coefficient ; heat of dilution ; apparent molal volume ; density
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract The extensive data for the osmotic coefficients, heats of dilution, and densities of aqueous solutions of rare earth chlorides, nitrates, and perchlorates are fitted to a single type of equation found satisfactory for many other solutes Good agreement is obtained. The various parameters do not show simple trends with cation radius. While there are some plausible explanations of these complexities, the total picture is far from clear.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00654217
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  • 3
    Digitale Medien
    Digitale Medien
    Glass transition temperatures of poly(alkyl α-cyanoacrylates) (1973)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 17 (1973), S. 3509-3514 
    Details
    ISSN: 0021-8995
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Maschinenbau , Physik
    Notizen: The glass transition temperatures of the poly(alkyl α-cyanocrylates) were determined by the dilatometric technique, and some of the values were checked by differential thermal analysis. The data indicate that the Tg's appear to decrease with increase in the size of the alkyl group, for a given molecular weight range. It was also found that the Tg of poly(methyl or butyl α-cyanoacrylate) increased with molecular weight. All cyanoacrylates, excepting methyl and ethyl esters, formed only low molecular weight polymers in aqueous surroundings. Therefore, they have characteristic low glass transition temperatures, causing coalescence at low temperatures.
    Zusätzliches Material: 3 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/app.1973.070171122
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  • 4
    Digitale Medien
    Digitale Medien
    The in vivo metabolic degradation of poly (methyl cyanoacrylate) via thiocyanate (1967)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Biomedical Materials Research 1 (1967), S. 11-16 
    Details
    ISSN: 0021-9304
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Medizin , Technik allgemein
    Notizen: Methyl α-cyanoacrylate, when implanted subcutaneously in rats and dogs, has been shown to lead to an increase in thiocyanate output in the urine, presumably through the formation of cyanide anions which are subsequently converted to thiocyanate. It is postulated that this reaction may be one of the reactions contributing to tissue necrosis when methyl α-cyanoacrylate is used as a tissue adhesive.
    Zusätzliches Material: 3 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/jbm.820010104
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  • 5
    Digitale Medien
    Digitale Medien
    Tissue adhesives and hemostasis-inducing compounds: The alkyl cyanoacrylates (1967)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Biomedical Materials Research 1 (1967), S. 3-9 
    Details
    ISSN: 0021-9304
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Medizin , Technik allgemein
    Notizen: In an effort to obtain tissue adhesive monomers which would wet and spread on tissue substrates and be rapidly biodegradable, the branched esters of alkyl α-cyanoacrylates, as well as a 95-5 wt.-% mixture of n-heptyl and methyl α-cyanoacrylate, were studied. The data indicate that alkyl α-cyanoacrylates having branched alkoxy groups appear to be promising in this regard.
    Zusätzliches Material: 4 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/jbm.820010103
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  • 6
    Digitale Medien
    Digitale Medien
    Cutaneous absorption of N-alkyl α-cyanoacrylate (1968)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Biomedical Materials Research 2 (1968), S. 157-163 
    Details
    ISSN: 0021-9304
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Medizin , Technik allgemein
    Notizen: Three monomers, β-14C-tagged methyl, n butyl, and n-heptyl α-cyanoacrylate, have been applied to intact skin and split-thickness skin-graft donor sites on rats. The data indicate that the urinary 14C activity is in the order: methyl 〉 n-butyl or n heptyl. Also, the urinary activity, when the monomers are applied to the split thickness skin graft donor sites, is approximately threefold greater than when the monomers are applied to intact skin. The conclusion is that the application of cyanoacrylate monomer to the skin is not only topical in nature, but may involve the internal milieu as well.
    Zusätzliches Material: 1 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/jbm.820020112
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  • 7
    Digitale Medien
    Digitale Medien
    Use of polymerizable ring compounds in constant volume polymerizationsContribution from The Plastics Laboratory, Princeton University, Princeton, N. J. (1948)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 3 (1948), S. 604-606 
    Details
    ISSN: 0022-3832
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/pol.1948.120030415
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  • 8
    Digitale Medien
    Digitale Medien
    Phthalyl peroxide as a polymerization initiator (1951)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 7 (1951), S. 537-541 
    Details
    ISSN: 0022-3832
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Physik
    Notizen: Polymeric phthalyl peroxide was used as an initiator for the polymerization of styrene at 60°C. The peroxide is initially partially insoluble in the monomer, but decomposes and becomes soluble during the course of the polymerization. The intrinsic viscosity of the polymer formed increases with increasing conversion and at about 65-70% conversion becomes higher than would arise from a monoradical-initiated polymerization proceeding at the same rate.
    Zusätzliches Material: 1 Tab.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/pol.1951.120070508
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  • 9
    Digitale Medien
    Digitale Medien
    Liquid polyacrylates (1953)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 11 (1953), S. 539-544 
    Details
    ISSN: 0022-3832
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Physik
    Notizen: Liquid polymers of ethyl, n-butyl, and 2-ethylhexyl acrylates were prepared using an anionic initiating system. Liquid polyethyl acrylate was tested as a plasticizer in a stabilized and unstabilized polyvinyl chloride plastisol composition. In the unstabilized composition, fused samples were obtained which were comparable in color to a di-2-ethylhexyl phthalate (DOP) plasticized polyvinyl chloride sample prepared under the same conditions. Stress-strain tests on stabilized films indicated that with liquid polyethyl acrylate as the plasticizer a film was obtained showing higher tensile strength, yet equivalent ultimate elongation as compared to a similarly prepared DOP plasticized composition.
    Zusätzliches Material: 2 Tab.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/pol.1953.120110604
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  • 10
    Digitale Medien
    Digitale Medien
    Initiation of polymerization of alkyl 2-cyanoacrylates in aqueous solutions of glycine and its derivatives (1971)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-1: Polymer Chemistry 9 (1971), S. 2977-2981 
    Details
    ISSN: 0449-296X
    Schlagwort(e): Physics ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: The polymerization of methyl 2-cyanoacrylate and heptyl 2-cyanoacrylate was carried out with the use of aqueous solutions of 14C-tagged glycine, methyl glycine, and acetyl glycine as initiators. When glycine and methyl glycine were used, radioactive polymers were formed. When acetyl glycine was used, the polymer formed was not radioactive. The data seem to indicate that free NH2 groups appear to be necessary for the incorporation of the glycine initiator in the polymer. A possible mechanism for the polymerization is presented.
    Zusätzliches Material: 1 Tab.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/pol.1971.150091018
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