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  • 1
    Electronic Resource
    Electronic Resource
    Trocknen von Tablettengranulaten mittels ablufttemperaturgeregelter GleichgewichtseinstellungVortrag auf dem Jahrestreffen der Verfahrens-Ingenieure, 29. Sept. bis 1. Okt. 1982 in Basel. (1983)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 55 (1983), S. 221-221 
    Details
    ISSN: 0009-286X
    Keywords: Granulat ; Trocknung ; Steuerung ; Wasseraktivität ; Wassergehalt ; Wirbelschicht-Trocknung ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330550313
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  • 2
    Electronic Resource
    Electronic Resource
    Block copolymers by radical polymerization 3Part 2: cf.4.. Block copolymers of styrene, methyl acrylate, n-methyl-n-vinylacetamide, 1-vinyl-2-pyrrolidone (1982)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 183 (1982), S. 1685-1700 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: A polyazoinitiator obtained from 2,2′-azoisobutyronitrile (AIBN) and a diol is used to prepare block copolymers according to the Smets procedure. Partial decomposition of the polyazoinitiator in presence of a monomer results in an azogroup-containing prepolymer. Block copolymers are obtained decomposing the remaining azo groups in presence of a second monomer. Examples investigated are styrene/methyl acrylate, styrene/N-methyl-N-vinylacetamide, methyl acrylate/N-methyl-N-vinylacetamide, 1-vinyl-2-pyrrolidone/acrylonitrile. Homopolymers are produced simultaneously. Up to 70% of block copolymers are formed in these reactions. Block copolymers of styrene/methyl acrylate have hard/soft segmented molecules. It is an elastic material with spherical, cylindrical and lamellar, resp. domain structures, depending on the composition.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1982.021830710
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  • 3
    Electronic Resource
    Electronic Resource
    Korrosion und Korrosionsschutz in der Lebensmittelindustrie (1973)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 24 (1973), S. 513-517 
    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: Corrosion and corrosion protection in the food industriesThe corrosion of equipment and packaging materials being contacted with food products can result in undesirable alterations of aspect and flavour and in serious cases may give rise to intoxication. Corrosion protection must therefore consider the material to be processed as well as the material of construction. Machinery for processing food products are mostly made of stainless steel which should have a certain molybdenum content to possess sufficient pitting resistance in salt solutions. Aluminium can be used in many instances, provided the particular medium contains neither halides nor bases. Plastic coatings are used increasingly in recent time. In such cases, however, one has to consider, in addition to the corrosion resistance of the materials, the danger of migration of certain ingredients such as plastifier or stabilizers. On the product side one may rely on the inhibiting efficiency of certain constituents, e. g. gelatine.
    Notes: Die Korrosion der Anlagen und Verpackungen, die mit Lebensmitteln in Berührung kommen, kann zu unerwünschten Veränderungen des Aussehens und des Geschmacks und in ernsten Fällen sogar zu Vergiftungen führen. Beim Korrosionsschutz muß man daher sowohl vom Material als auch won den Lebensmitteln her ausgehen. Die Maschinen, die mit Lebensmitteln in Berührung kommen, werden meist aus nichtrostendem Stahl gefertigt, vorzugsweise mit einem gewissen Molybdängehalt, um ausreichende Beständigkeit gegen Lochfraß in Salzlösungen zu gewährleisten. Aluminium kann in zahlreichen Fällen verwendet werden, sofern das jeweilige Medium weder Halogenide noch Basen enthält. In neuerer Zeit verwendet man zunehmend Kunststoffüberzüge. Dabei ist jedoch nicht nur die Korrosionsbeständigkeit dieser Materialien zu berücksichtigen, sondern ebenso die Gefahr der Migration von Bestandteilen (z. B. Weichmacher, Stabilisatoren) aus dem Kunststoff. Produktseitig kann man berücksichtigen, daß manche Bestandteile (z. B. Gelatine) inhibierend wirken.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19730240608
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  • 4
    Electronic Resource
    Electronic Resource
    Structure and properties of poly(ethylene terephthalate) crystallized by annealing in the highly oriented state. 3. Dynamic- and static-mechanical properties (1982)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 102 (1982), S. 117-145 
    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: Kommerzielle unverstreckte und kalt verstreckte (5 × ) Fasern und Borsten aus Polyethylenterephthalat (PETP) wurden nach dem Verstrecken mit festen Enden 6 h im Vakuum bei verschiedenen Temperaturen zwischen 60 und 260°C getempert. Mit diesen Proben wurden statisch- und dynamisch-mechanische Messungen durchgeführt.Es wurde festgestellt, daß der α- und β-Prozeß, sowie die Moduli von der Tempertemperatur in verschiedener Weise für die verstreckten und unverstreckten Proben abhängen. Die aufgrund von tg δ und Verlustmoduln ermittelte Temperaturlage des β-Peaks, sowie auch die Stufenhöhen von α- und β-Prozessen sind für die unverstreckten Proben gegenüber der Tempertemperatur unempfindlich im Gegensatz zu den verstreckten Proben, für die ein Maximum beobachtet worden ist. Dieses Maximum wird mit der dominierenden Rolle eines der beiden bei der entsprechenden Kristallisationstemperatur konkurrierenden Prozesse - Kristallisation und Desorientierung - erklärt.Die dynamisch und statisch gemessenen Moduln sowie die Bruchspannung nehmen für das verstreckte PETP mit steigender Temperatemperatur ab. Die entscheidende Bedeutung der Orientierung und des Zustandes der amorphen Phase für die mechanischen Eigenschaften im Vergleich mit der Kristallinität wird gezeigt.Eine extrem hohe Deformierbarkeit bei Raumtemperatur (bis zu 200%) von vorverstreckten und anschließend bei 255 oder 260°C getemperten Borsten ist beobachtet worden. Dieses Verhalten ist durch eine Nachpolykondensation im festen Zustand und durch partielles Schmelzen während der Temperaturbehandlung im Vakuum bedingt.
    Notes: Commercial undrawn and cold drawn (5 × ) poly(ethylene terephthalate) (PETP) fibers and bristles have been annealed with fixed ends for 6 h in vacuum at different temperatures between 60 and 260°C. With these samples static- and dynamicmechanical measurements have been carried out.It has been found that the α-and β-processes as well as the moduli depend on the annealing temperature (Ta) in different way, for undrawn and drawn material. The temperature position of the β-peak evaluated from tg δ and loss modulus as well as the step height of α- and β-processes are unsensitive to the Ta for the undrawn material in contrast to the drawn one for which maxima are observed. The appearance of these maxima is explained by the dominating role at the corresponding crystallization temperature of one of the two concurrent processes - crystallization and disorientation, reflected in the change of the effective density of amorphous regions.The dynamic and static measured moduli as well as the stress at break for drawn PETP decrease with the increase of annealing temperature as generally observed. The predominating significance of orientation and the state of amorphous phase in comparison with crystallinity is demonstrated.An extremely high deformation ability at room temperature (up to 200%) of previously drawn and annealed at 255 or 260°C bristles is observed. This originates from the solid state postcondensation and premelting phenomena taking place during annealing in vacuum.
    Additional Material: 18 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1982.051020113
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  • 5
    Electronic Resource
    Electronic Resource
    Copolymerization of pentachlorophenyl acrylate with vinyl acetate and ethyl acrylate. Polymer-bound fungicides (1981)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 26 (1981), S. 2403-2413 
    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: Copolymers of pentachlorophenyl acrylate (M1) with both vinyl acetate and ethyl acrylate were prepared (in benzene at 60°C initiated by t-butyl peroxypivalate) at a variety of M1/M2 ratios. The reactivity ratios for the vinyl acetate (M2) copolymerizations were r1 = 1.44 and r2 = 0.039, while for ethyl acrylate copolymerizations r1 = 0.21 and r2 = 0.88. The glass transition temperatures were obtained as a function of the M1/M2 ratio. The values of Tg for the copolymers fell between those of poly(pentachlorophenyl acrylate) and either poly(vinyl acetate) or poly(ethyl acrylate). A series of bulk copolymers with low pentachlorophenyl acrylate content were studied as biocidal coatings using accelerated growth agar dish tests inoculated with Aspergillus sp., Pseudomonas sp., Alternaria sp., and Aureobasidium pullulans. The copolymers retarded or prevented growth but did not give a zone of inhibition around the coatings. Pentachlorophenol, when added to coating polymers, did exhibit a zone of inhibition due to migration of this biocide into the agar medium.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1981.070260726
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  • 6
    Electronic Resource
    Electronic Resource
    Systeme zum Ein- oder Austrag von Schüttgütern in oder aus Druckräumen (1984)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 56 (1984), S. 755-768 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Systems for the charging or discharging of bulk solids into or out of pressure chambers. In many branches of chemical and dressing technology there are compelling thermodynamic or economic reasons for carrying out various processes at pressures deviating from ambient values. If the reactants and products of these processes are dusts or granular solids then numerous problems are encountered on transfer between regions of higher or lower pressure. On the one hand, the properties of the feed (such as particle size, flow behaviour) should undergo the slightest possible modification, and on the other hand the transport of the material between the regions of differing pressure should be as continuous as possible. Moreover, the gas transport should be kept low. Pressure swing in the process region is to be avoided. The aim of this study was to survey all systems suitable for introduction or removal of bulk solids into or out of chambers at pressures other than the ambient value. The various pressure locks are assessed qualitatively for given tasks. A new solution is presented for the discharge of filter cake from high-pressure chambers.
    Additional Material: 19 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330561005
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  • 7
    Electronic Resource
    Electronic Resource
    Hochdruckextraktion im Labormaßstab - Eine Entscheidungshilfe für die Prozeßplanung (1980)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 52 (1980), S. 918-919 
    Details
    ISSN: 0009-286X
    Keywords: Extraktion ; Kohlendioxid ; Prozeßplanung ; überkritische Gase ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330521119
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  • 8
    Electronic Resource
    Electronic Resource
    Druckbehälterverordnung. Von M. Nöthlichs und W. Kalwa. Erich Schmidt-Verlag, Bielefeld 1981. Grundwerk, 748 S., einschl. Spezial-ordner DM 96.-. (1983)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 55 (1983), S. 38-38 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330550110
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  • 9
    Electronic Resource
    Electronic Resource
    Zur Verbesserung der Klärung in DekantierzentrifugenVortrag auf dem Jahrestreffen der Verfahrens-Ingenieure, 29. Sept. bis 1. Okt. 1982 in Basel. (1983)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 55 (1983), S. 324-325 
    Details
    ISSN: 0009-286X
    Keywords: Dekantierzentrifugen ; Klärung ; Scale-up ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330550423
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  • 10
    Electronic Resource
    Electronic Resource
    Copolymerization parameters of methyl methacrylate and acrylic acid (1981)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 19 (1981), S. 371-380 
    Details
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The relative reactivity of acrylic acid is known to be influenced by the polymerization medium. Nonetheless, the more commonly used reactivity ratios do not show this dependence because they were calculated from low-conversion polymerizations. We have studied the copolymerization of acrylic acid and methyl methacrylate in a number of non-hydrogen-bonding and hydrogen-bonding solvents. We found that the acrylic acid fraction in the copolymer was larger when copolymerized in a non-hydrogen-bonding medium and that the methyl methacrylate fraction was larger when copolymerized in a hydrogen-bonding medium. The precise reactivity ratios were reported when toluene, benzene, isopentyl, acetate, ethyl acetate, methyl formate, and tert-butyl alcohol were used as the polymerization medium. The values were obtained by chromatographic analysis of residual monomer, followed by computation based on the nonlinear, least-squares technique of Tidwell and Mortimer.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1981.170190213
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