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  • 1
    Electronic Resource
    Electronic Resource
    Study on the pyrolysis of cellulose and its derivatives (1970)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 132 (1970), S. 7-22 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Es wurde die Kinetik der Pyrolyse von Baumwoll-Cellulose und Celluloseacetat von verschiedenem Substitutionsgrad untersucht. Der Bereich der Zersetzungstemperatur der Celluloseproben nimmt mit steigendem Substitutionsgrad ab, die Stabilität nimmt dagegen mit steigendem Substitutionsgrad zu. Es wird für die untersuchten Proben ein wahrscheinlicher Abbaumechanismus diskutiert. Sowohl für die Zersetzung der Proben als auch für die der Rückstände wurden Aktivierungsenergie und Reaktionsordnung bestimmt und mit DTA-Messungen in Beziehung gesetzt.
    Notes: Kinetics of pyrolysis of cotton cellulose and cellulose acetate with different degrees of substitution have been studied. The range of decomposition temperature of the cellulose samples was found to decrease with the increase in degree of substitution. However, the stability of the polymer increased as the degree of substitution increased. Probable mechanism of degradation of the test samples is discussed. Energy of activation and order of reaction for the decomposition of polymer samples as well as for the residual materials have been determined and correlated with DTA measurements.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1970.021320102
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  • 2
    Electronic Resource
    Electronic Resource
    Synthesis and study of the chelating properties of 3-carboxy-4-hydroxyacetophenone-formaldehyde resins (1988)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 160 (1988), S. 175-186 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: 3-Carboxy-4-hydroxyacetophenon (CHAP) wurde in verschiedenen Mengenverhältnissen mit Formaldehyd unter Verwendung von Alkali als Katalysator polykondensiert. Die erhaltenen Polykondensate (CHAP-F) wurden durch Elementaranalyse, IR-Spektroskopie, Bestimmung des Zahlenmittels der Molmasse (M̄n), Thermogravimetrie und Bestimmung der Grenzviskosität charakterisiert. Es wurden polymere Metallchelate mit Cu2+ -, Fe3+ -, Co2+ -, Ni2+ - und UO2+2 -Ionen hergestellt und charakterisiert. Mit Hilfe der Batch-Austauschmethode wurden Ionenaustauschereigenschaften eines CHAP-F Harzes gegen Fe3+ - Cu2+ - und Ni2+ -Ionen bestimmt.
    Notes: 3-Carboxy-4-hydroxyacetophenone (CHAP) was polycondensed with various proportions of formaldehyde using alcoholic alkali as catalyst. The resin samples, designated as CHAP-F, have been characterized by elemental analyses and IR spectroscopy, by estimation of their number average molecular weights (M̄n), by measurement of intrinsic viscosity, and by TGA. Polymeric metal chelates of one CHAP-F sample with Cu2+, Fe3+, Co2+, Ni2+, and UO22+ ions have been prepared and characterized.Ion-exchanging properties of one CHAP-F resin sample for Fe3+, Cu2+, and Ni2+ metal ions are studied by the application of the batch-equilibration method.
    Additional Material: 5 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1988.051600114
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  • 3
    Electronic Resource
    Electronic Resource
    Twinning in polyacrylonitrile (1973)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 169 (1973), S. 291-300 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Eine Vielfalt von Polyacrylnitril-Zwillingskristallen wurde nach der Filmbildungsmethode hergestellt. Die Kristalle wurden nach ihrer Entstehungsart klassifiziert. Es wurde gezeigt, daß Zwillingskristalle durch mehrere Mechanismen erzeugt werden können. Der Habitus und die Orientierung der nach verschiedenen Ursprungsmechanismen entstandenen Sekundärlamellen wurden untersucht.
    Notes: A great variety of twinned crystals of polyacrylonitrile (PAN) are grown by Film Formation Method. They have been classified according to their origin. It has been shown that twins of polymer crystals originate by several mechanisms. Habit and orientation of secondary lamellae generated by various mechanisms on twinned crystals have been studied.
    Additional Material: 20 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1973.021690127
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  • 4
    Electronic Resource
    Electronic Resource
    Diffusion of gases in cellulose triacetate (1978)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 179 (1978), S. 2531-2539 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Diffusion data of helium, nitrogen, oxygen, and carbon dioxide through glassy cellulose triacetate were obtained and analyzed by the modified time-lag technique of DiBenedetto and Paul. Thermodynamic data were evaluated and a probable mechanism for gaseous diffusion is discussed.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1978.021791017
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  • 5
    Electronic Resource
    Electronic Resource
    Polyethers. I. Polyethers from 2,4-dichloroquinolines and alkylene diols (1988)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 36 (1988), S. 561-566 
    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: Polyethers are prepared by condensing, respectively, 2,4-dichloroquinoline and its 6-methyl and 6-methoxy derivatives separately with ethylene, propylene, butylene, diethylene and triethylene glycols. These polyethers are characterized and the electrical conductivity of polyethers is measured at various temperatures up to 150°C.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1988.070360309
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  • 6
    Electronic Resource
    Electronic Resource
    Action of phenols on the corrosion of 3S aluminium in hydrochloric acid solutions (1973)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 24 (1973), S. 964-966 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Wirkung von phenolen auf die Korrosion von Al 3S in SalzsäurelösungenDie inhibierende Wirkung einiger Phenole auf die Korrosion von Eisen in 0,5 n Salzsäure ist abhängig von der Konzentration und der Konstitution des jeweiligen Inhibitors. Die Wirkung nimmt ab in der Reihenfolge p-Thiokresol 〉 Pyrogallol 〉 Reihenfolge 〉 Phenol 〉 p-Kresol 〉 m-Kresol 〉 o-Kresol. Der geringe Hemmwert der Kresole scheint durch die Elektronendonator-Wirkung der CH3-Gruppen und durch deren Wechselwirkung mit der ebenfalls als Elektrodonator auftretenden OH-Gruppe bedingt zu sein. Die SH- und OH-Gruppen scheinen die Adsorption an den kathodischen Stellen ebenso zu erleichtern, wie es die π-Elektronen des aromatischen Ringes tun.
    Notes: The inhibiting effect of some phenols on the corrosion of iron in 0.5 N hydrochloric acid depends from the concentration and the constitution of the particular inhibitor. The effect decreases in the following order; p-thiocresol 〉 pyrogallol 〉 resorcinol 〉 phenol 〉 p-cresol 〉 m-cresol 〉 o-cresol. The low inhibiting power of the cresols appears to be due to the cresol appears to be due to the electron donating capacity of th CH3 groups and their interaction with OH groups which is an electron donator, too. The SH and OH groups appear to facilitate the adsorption on cathodic sites as do the π-electrons of the aromatic annulus.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19730241106
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  • 7
    Electronic Resource
    Electronic Resource
    Diffusion of gases in poly(methyl methacrylate) (1972)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 158 (1972), S. 65-79 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Die Diffusion von Helium, Sauerstoff, Stickstoff und Kohlendioxid in Polymethylmethacrylat wurde untersucht. Die erhaltenen Daten wurden nach der von PAUL und DIBENEDETTO modifizierten Methode ausgewertet. Verschiedene thermodynamische Parameter wurden berechnet. Der Mechanismus des Diffusionsprozesses wird diskutiert.
    Notes: Diffusion of helium, oxygen, nitrogen, and carbon dioxide in poly(methyl methacrylate) has been studied. The data are analyzed employing the new modified time-lag technique developed by PAUL and DIBENEDETTO. Different thermodynamic parameters have been evaluated and the mechanism of gaseous diffusion has been discussed.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1972.021580107
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  • 8
    Electronic Resource
    Electronic Resource
    Thermal behaviour of starches and their graft copolymers with polyacrylonitrile (1987)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 150 (1987), S. 45-64 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Es wurde das thermische Verhalten von 12 verschiedenen Stärken und ihren Pfropfcopolymeren mit Polyacrylnitril (PAN) aus dem nativen und gelierten Zustand mit Hilfe der Differentialkaloriemetrie (DSC) und der Rasterelektronenmikroskopie (REM) untersucht. Alle Stärken wiesen zwei endotherme Peaks bei etwa 65 und 260°C und einen exothermen Peak bei ca. 335°C auf. Das Pfropfcopolymere aus nativer Stärke zeigt einen schwachen endothermen Peak um 65°C und einen exothermen bei 300°C, während gelierte Stärke den charakteristischen exothermen Peak von Polyacrylnitril bei 250°C zusammen mit dem exothermen Peak des Propfproduktes bei 300°C aufweist. Um die endothermen Peaks der Stärke bei 65 und 265°C aufzuklären, wurden REM Untersuchungen durchgeführt. Der erste Peak läßt sich durch Dehydratation beim Erhitzen erklären, während der zweite dem Aufschmelzen von Kristalliten in der Stärke zuzuschreiben ist. Eine spezifische Eigenschaft der Hülsenfruchtstärken ist das Festhalten von Feuchtigkeit, selbst wenn sie im gelierten Zustand gepfropft wurden.
    Notes: Thermal behaviour of twelve different starches and their graft copolymers with polyacrylonitrile (PAN) from granular and gelatinized state, has been examined by differential scanning calorimetry (DSC) and scanning electron microscopy (SEM). All the starches exhibit two endotherms around 65 and 260°C and an exotherm around 335°C. The graft copolymer from granular starch shows a weak endotherm around 65°C and an exotherm around 300°C, while gelatinized starch exhibits the characteristic exotherm of PAN at about 250°C along with the exotherm of graft product at 300°C. Scanning electron microscopic studies were carried out to explain the endotherms of starch at 65°C and 265°C. The former one may be due to heat of dehydration while the latter one is attributed to the fusion of crystallites in the starch. Legumine starches seem to have a specific property of retaining moisture even if they are grafted in gelatinized state.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1987.051500105
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  • 9
    Electronic Resource
    Electronic Resource
    A study on adsorption of poly(methyl methacrylate) on aluminium silicate (1971)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 18 (1971), S. 39-47 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Der Einfluß von Temperatur, Lösungsmittel und Molekulargewicht auf die Adsorption von Polymethylmethacrylat an Aluminiumsilikat und die Kinetik der Adsorption wurden untersucht. Die Geschwindigkeitskonstanten betragen 1,4 · 10-2 bei 30 °C und 1,0 · 10-2 min-1 bei 45 °C. Die Adsorptionsdaten wurden nach Langmuir und Simha-Frisch-Eirich ausgewertet. Zur Deutung der Ergebnisse erwies sich die Langmuir-Isotherme als geeignet.
    Notes: Effect of temperature, solvent power, and molecular weight on the adsorption of poly methyl methacrylate (PMMA) on aluminium silicate has been studied. Kinetics of adsorption have been also investigated at 30° and 45 °C. The values of rate constants at these temperatures are 1.4 · 10-2 and 1.0 · 10-2 min-1 respectively. The adsorption data have been analysed according to the Langmuir and the Simha-Frisch-Eirich (SFE) isotherms. The results could be adequately explained in terms of the Langmuir isotherm.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1971.050180104
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  • 10
    Electronic Resource
    Electronic Resource
    Hedrite growth in polyacrylonitrile (1971)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 20 (1971), S. 197-201 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Hedrite growth has been observed in PAN from its solution in propylene carbonate in the concentration range 0.06% to 0.5%.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1971.050200117
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