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  • 1
    Electronic Resource
    Electronic Resource
    Nomenclature of polymers (based on structure) (1989)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 27 (1989), S. 2065-2070 
    Details
    ISSN: 0887-624X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: In the complete absence of a systematic polymer nomenclature, a scheme of nomenclature based on structure is proposed. The problem of naming a “mer” has been solved for an addition polymer by adding “ne” to the monomer name, the justification being on withdrawal of a π bond a monomer becomes a mer. To furnish completeness to the nomenclature, condensation polymers were included in the system. The present nomenclature system of polymers is very arbitrary. Some polymers are not chemically named, some named incorrectly, and there are some fantastic names. After pointing these out, the possible solutions were shown, encompassing a systematic discussion on nearly every type of polymer-linear, branched, or crosslinked-and copolymer (including block or graft), and plastic, fiber, or rubber, and stereospecific polymer. One or more names were proposed for different cases.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pola.1989.080270624
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  • 2
    Electronic Resource
    Electronic Resource
    A dynamic mechanical study on unidirectional carbon fiber-reinforced polypropylene composites (1994)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 51 (1994), S. 831-840 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Fiber-reinforced polymer composites show high specific strength and stiffness. The alignment of reinforcing fibers results in anisotropy of the material. This anisotropic behavior has been studied through dynamic mechanical analysis of unidirectional carbon fiber-reinforced polypropylene (CFRPP) composites measured in both parallel and transverse directions to fiber arrangement. Several parameters such as storage modulus (E′), loss modulus (E″), loss factor or damping factor (tan δ), and complex viscosity (MU*) have been determined over a wide range of frequencies and at a fixed temperature. Relaxation and retardation spectra have been constructed for these composites. Modulus enhancement occurs due to stiffness imparted by the fiber and efficient stress transfer at the interface. Relaxation of the polymer matrix ceases with increase in the volume fraction of the fibers. α′-relaxation is observed for the composite having a 13% volume fraction of fibers and is ascribed to relaxation in the crystalline phase where the additional crystallinity arises out of the transcrystalline growth at the fiber-matrix interface. There exists a good correlation between theroretical curves with the experimental ones. Relaxation and retardation spectra and the dynamic parameters determined for these composites show a good correlation with the volume fraction of fibers as well as the direction of the applied load. © 1994 John Wiley & Sons, Inc.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1994.070510506
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  • 3
    Electronic Resource
    Electronic Resource
    Graft copolymerization of methyl methacrylate and natural rubber (1967)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 11 (1967), S. 1603-1611 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Graft copolymerization of natural rubber and MMA was carried out in the presence of Bz2O2 or AIBN as thermal initiator and hydrogen peroxide or benzophenone as photosensitizer. From the overall copolymerization product, the rubber-PMMA graft copolymer fraction was isolated from unreacted rubber and free PMMA fractions and composition characterization of the separated fractions was done by determination of rubber unsaturation. The efficiency of grafting under different conditions has been calculated and compared.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1967.070110821
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  • 4
    Electronic Resource
    Electronic Resource
    On the single-point determination of intrinsic viscosity (1971)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 15 (1971), S. 1599-1605 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: In the present paper we have analytically derived a single-point equation for determining the intrinsic viscosity of a polymer. It is observed that the proposed equation gives a much better agreement with the extrapolated value of [η] over a wide range of concentration for good as well as poor polymer-solvent systems.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1971.070150704
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  • 5
    Electronic Resource
    Electronic Resource
    A study on blends of nylon-6 and nylon-66 (1986)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 31 (1986), S. 747-762 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Blending of nylon-6 and nylon-66 was carried out by coextrusion in the whole range of compositions with particular emphasis on small amounts of one polymer in the other. Most significant improvement in properties is achieved at low blend compositions in which the minor component remains amorphous while severely affecting the crystallization behavior of the major component. The nylon-6-rich blends crystallize predominantly in the γ-crystalline form, whereas the nylon-66-rich blends exhibit low crystallinity. Because of this property, the blends are more easily drawable, giving rise to a more highly oriented structure with improved tensile properties and uniformity. High tenacity and modulus are observed in drawn blends containing 70% nylon 6 and 30% nylon-66.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1986.070310301
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  • 6
    Electronic Resource
    Electronic Resource
    Monohydroxytrifluoroborates and double fluoroborates (1970)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 379 (1970), S. 106-111 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Es wird die Darstellung von Hydroxotrifluoroboraten von Rb, Cs, (CH3)4N+, Nitron, Ni2+, Ni(py)42+ und Co(NH3)63+ beschrieben. Darüber hinaus wurden neuartige 1 : 1-Doppelsalze aus Tetrafluoro- und Hydroxotrifluoroborat erhalten. Von einigen dieser Salze werden Röntgenpulver- und IR-Daten mitgeteilt.
    Notes: The preparation of monohydroxotrifluoroborates of rubidium, cesium, tetramethylammonium, nitron, nickel, tetrapyridine nickel and hexammine cobalt(III) is described. Besides, a new series of double salts, comprising one mole tetrafluoroborate and one mole of monohydroxotrifluoroborate of the same cation, are described. The X-ray and IR-spectra of some of these salts are reported.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19703790118
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  • 7
    Electronic Resource
    Electronic Resource
    Oxofluorovanadates(V). II Dioxodifluorovanadates (1971)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 384 (1971), S. 255-259 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Ammonium-, Natrium-, Hexamminkobalt (III) und Åthylendiaminium-dioxofluorovanadat(V), MIVO2F2. wurden dargestellt und durch Röntgenpulveraufnahmen, IR-Spektrum und im Falle des NH4-Salzes-Thermogravimetrie charakterisiert.
    Notes: The syntheses of ammonium, sodium, hexamminecobalt(III) and ethylene-diamine dioxodifluorovanadate(V), MIVO2F2, are reported. Their x-ray powder diffraction data are different from those of the corresponding tetrafluoroborates and perchlorates. Their infrared spectra have been recorded (700-4000 cm-1), and probable band assignments made. The ammonium dioxodifluorovanadate has been studied through thermogravimetry, and the composition of an intermediate product is discussed from its chemical analysis and infrared spectrum.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19713840310
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  • 8
    Electronic Resource
    Electronic Resource
    Mechanistic studies on the Reactions of Cis-Diaquobis (Biguanide)Chromium(III) ion with 2,2′-dipyridyl and 1,10-phenanthroline (1976)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 424 (1976), S. 93-96 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Untersuchungen der Mechanismen der Reaktionen des cis-Diaquobis(biguanid)-Chrom(III)-Ions mit 2.2′-Dipyridyl und 1.10-PhenanthrolinKinetische Untersuchungen in wäßriger Lösung über den Austausch der Wasser-Liganden im cis-[Cr(BigH)2(OH2)2]3+ (BigH = Biguanid, C2H7N5) durch 2.2′-Dipyridyl bzw. 1.10-Phenanthrolin (phen) unter Bildung von [Cr(BigH)2(AA)]3+ (AA = dipy bzw. phen) wurden spektralphotometrisch durchgeführt.
    Notes: Kinetic studies in aqueous solution on the replacement of the aqua ligands in cis-[Cr(BigH)2(OH2)2]3+ (BigH = biguanide, C2H7N5) by 2,2′-dipyridyl (dipy) and 1,10-phenanthroline (phen) forming [Cr(BigH)2(AA)]3+ (AA = dipy or phen) have been made spectrophotometrically. In both the cases the reaction proceeds by a path purely first-order with respect to the ligand. From the values of the rate constant at four different temperatures, values of the activation parameters, ΔH≠ and ΔS≠, have been evaluated for each system. The results are consistent with a mechanism involving outer-sphere association of the reactants followed by transformation of the outer-sphere complex in a dissociative process.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19764240114
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  • 9
    Electronic Resource
    Electronic Resource
    Oxofluorovanadates(V). III. Dioxotrifluorovanadates (1972)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 390 (1972), S. 61-63 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Die Darstellung der Dioxitrifluorovanadate, MI2 (VO2F3)(M = Na+, NH+4, 1/2Ni2+) und MII(HVO2F3)2· xH2O (M = Cu2+, Ni2+, Co2+) wird beschrieben. Leitfähigkeitsmessungen von K2VO2F3 in verschiedener Konzentration deuten auf eine Dissoziation 2K+-und VO2F2-3-Ionen.
    Notes: Preparation of the salts of the series dioxotrifluorovanadates, M2I (VO2F3), where M = Na+, NH+4, 1/2Ni2+ and MII(HVO2F3)2· xH2O where M = Cu2+, Ni2+ and Co2+ are described. Molecular conductivity measurement of potassium dioxotrifluorovanadate(V), K2VO2F3, at different dilutions indicates that it dissociates primarily into 2K+ and VO2F2-3 ions.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19723900108
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  • 10
    Electronic Resource
    Electronic Resource
    Oxofluorovanadates(V). IV. Dioxotetrafluorovanadates (1972)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 390 (1972), S. 311-315 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Es werden die Darstellung und die Eigenschaften der Salze M3IVO2F4 (M = NH4+, Na+, K+, 1/2 Ni2+ 1/3 [Co(NH3)6]3+) beschrieben. Aus Leitfähigkeitsmessungen von Na3VO2F4 in verschiedener Konzentration wird auf eine Dissoziation in 3 Na+- und VO2F43--Ionen geschlossen. Der Ionenaustausch von (NH4)3VO2F4-Lösung am Kationenaustauscher (H+-Form) zeigt, daß die entsprechende Säure zum Teil zu V2O5 zerfällt. (NH4)3VO2F4, reagiert mit BaCl2- und AgNO3- Lösungen unter Bildung von BaVO2F3 bzw. AgVO3. Röntgen-Untersuchungen sind an (NH4) VO2F4- und Na3VO2F4-Pulvern durchgeführt worden.
    Notes: Preparation and properties of the salts of the series MI3VO2F4, where M = NH4+, Na+, K+, 1/2 Ni2+, and 1/3 [Co(NH3)6]3+ are described. Molecular conductivity of Na3VO2F4 at different dilutions indicates that Na3VO2F4 dissociates into 3 Na+ and VOaF43- ions. Ion exchange study of (NH4)3VO2F4 solution through cation exchange resin (H+ form) suggests that the corresponding acid decomposes partly to vanadium pentoxide. Reaction between (NH4)3VO2F4 with BaCl2 and AgNO3 solutions shows the formation of BaVO2F3 and AgVO3 respectively. Thermogravimetric study of (NH4)3VO2F4 shows the formation of impure vanadium pentoxide as the ultimate product on heating up to 450°C. X-ray powder diffraction data are given for (NH4)3VO2F4 and Na3VO2F4.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19723900311
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