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  • Polymer and Materials Science  (9)
  • 1
    Electronic Resource
    Electronic Resource
    Chromatographic properties of macroporous beads from poly(GMA-co-EDMA) (1992)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 195 (1992), S. 139-150 
    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: Eine Reihe makroporöser Glycidylmethacrylat-Ethylendimethacrylat-Copolymerer (GMA-co-EDMA) wurde durch Suspensionspolymerisation hergestellt; dabei wurden nach einer statistisch geplanten experimentellen Durchführung die Ethylendimethacrylatkonzentration und die Heizrate der Polymerisationstemperatur von 20 auf 70°C variiert. Die Porositätseigenschaften der hydrolysierten Copolymeren wurden mit Hilfe der Größenausschlußchromatographie unter Verwendung von Polystyrolstandards in Tetrahydrofuran charakterisiert. Das Porenvolumen, die spezifische Oberfläche und die Porengröße werden dabei durch die Konzentration des Vernetzungsmittels stärker beEinflußt als durch die Heizrate während der Polymerisation.
    Notes: A series of macroporous glycidyl methacrylate-ethylene dimethacrylate copolymers have been prepared by the suspension polymerization according to a statistical design of experimental approach in which concentration of ethylene dimethacrylate and time needed for raising the polymerization temperature from 20 to 70°C have been varied. The porous properties of hydrolyzed copolymers have been characterized by means of size exclusion chromatography using polystyrene standards in tetrahydrofuran. Pore volume, specific surface area, and pore size are affected by the crosslinking agent concentration rather than by the rate of temperature increase during the polymerization reaction.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1992.051950111
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Evaluation of data in sieve analysis of polymer-based sorbents by means of a new distribution function (1978)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 71 (1978), S. 51-60 
    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: Eine neue Funktion mit vier Anpassungsparametern wird als Modell für komplexe Größenverteilungskurven von körnigem Material vorgeschlagen. Eine Methode zur Bestimmung der Parameter von aus Siebanalysen erhaltenen experimentellen Daten wird beschrieben, und die Flexibilität der neuen Funktion wird an künstlichen und experimentellen Verteilungen gezeigt.
    Notes: A new function with four adjustable parameters is proposed as a model of complex particle size distribution curves of particulate materials. A method for determination of its parameters from experimental data obtained by sieve analysis is described and the flexibility of the new function is illustrated on examples of artificial and experimental distributions.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1978.050710105
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  • 3
    Electronic Resource
    Electronic Resource
    Reactive polymers, XXIXPart XXVIII: Angew. Makromol. Chem. 87 (1980) 119.. The effect of components on the rate of polymerization in model mixtures containing glycidylmethacrylate and ethylenedimethacrylate (1980)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 87 (1980), S. 127-136 
    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 der Konzentration an Vernetzungsmittel, der Menge und Zusammensetzung an inerten Komponenten und der Konzentration an Initiator auf die radikalische Copolymerisation von Glycidylmethacrylat mit Ethylendimethacrylat wurde unter den Bedingungen einer Suspensionspolymerisation untersucht. Es wurde gefunden, daß die Polymerisationsgeschwindigkeit mit steigender Konzentration an Vernetzungsmittel sinkt, was auch den Zeitpunkt hinausschiebt, zu dem die Reaktionsmischung trübe wird. Die Gründe für diese Erscheinung werden diskutiert.
    Notes: The effect of the concentration of crosslinking agent, of the amount and composition of inert components and of the concentration of initiator on the process of radical copolymerization of glycidylmethacrylate with ethylenedimethacrylate modelling the situation arising in suspension polymerization has been studied. It was found, that the rate of polymerization decreases with increasing concentration of the crosslinking agent in the mixture, which also brings about extension of the time after which the reaction mixture becomes turbid. Causes underlying these phenomena are discussed.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1980.050870109
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  • 4
    Electronic Resource
    Electronic Resource
    Reactive polymers, XXXVPart XXXIV: Angew. Makromol. Chem. 92 (1980) 133.. The effect of polymerization conditions on the specific surface area of macroporous copolymers from glycidylmethacrylate-ethylenedimethacrylate (1981)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 95 (1981), S. 109-115 
    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: Bei der Copolymerisation von Glycidylmethacrylat mit Ethylenglykoldimethacrylat wurden folgende Parameter variiert: Die Konzentration von Inertkomponente, Vernetzer, Initiator, die thermodynamische Qualität der Inertkomponenten sowie die Polymerisationstemperatur. Hierdurch war es möglich, die spezifische Oberfläche der Copolymeren in einem Bereich von 0 bis 460 m2g-1 zu variieren.
    Notes: By the method of design of experiments it was investigated the effect of some components of polymerization feed as the content of inert components, crosslinking agent, initiator, thermodynamic quality of inert components and polymerization temperature on the specific surface area of the produced sorbents which were copolymers from glycidylmethacrylate and ethylenedimethacrylate. By varying the five parameters given above, it was possible to control the specific surface area within the range 0-460 m2 g-1.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1981.050950108
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  • 5
    Electronic Resource
    Electronic Resource
    Reactive polymers. XXXII. Effect of composition of polymerization feed on morphology and some physical properties of macroporous suspension copolymers glycidyl methacrylate-ethylene dimethacrylatePart XXXI: J. Chromatogr. 194, 297 (1980). (1981)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 26 (1981), S. 411-421 
    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: The effects of inert solvent concentration of crosslinking agent and initiator and polymerization temperature on specific surface area, porosity, penetration modulus, stress at break, and inner and surface morphology of the copolymer glycidyl methacrylate-ethylene dimethacrylate were investigated. There is a direct influence of interfacial tension between the continuous and dispersed phases in suspension at the beginning of polymerization on the morphology of the bead, and hence on the resulting physical characteristics of the structure.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1981.070260203
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  • 6
    Electronic Resource
    Electronic Resource
    Reactive polymers. XXXIII.For Part XXXII see Ref. 1. The influence of the suspension stabilizer on the morphology of a suspension polymer (1981)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 26 (1981), S. 3205-3211 
    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: Sorbents based on glycidyl methacrylate were used in an investigation of the effect of the type of the suspension stabilizer and of its concentration on the shape, size, and morphology of beads consisting of submicroscopic particles (globules). Of many stabilizers used, only poly(vinyl pyrro-lidone) and poly(vinyl alcohol) led to the formation of regular spherical beads with a surface shell. As expected, beads obtained using a stabilizer producing higher interfacial tension poly(vinyl pyrrolidone)-K 90 were much larger. A similar effect may be reached by lowering the concentration of poly(vinyl alcohol), if this lowering is accompanied by a rise in the interfacial tension. Despite this, however, the surface shell was not compact in this relatively narrow range of interfacial ten-sions.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1981.070261002
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  • 7
    Electronic Resource
    Electronic Resource
    Reactive polymers, 50. The use of porous polymers in the sorption of tricyclic antidepressant in vitro (1985)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 132 (1985), S. 69-80 
    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: Drei chemisch verschiedene makroporöse Polymere wurden unter dem Gesichtspunkt der potentiellen Anwendung als Sorbentien zur Entgiftung des Blutes bei Arzneimittelvergiftung untersucht und mit der üblicherweise benutzten Aktivkohle verglichen. Die Messungen wurden in einer dynamischen Durchflußanlage mit einer Modellösung des Arzneimittels  -  eines trizyklischen Antidepressivums  -  unter Bedingungen, die der Praxis der Haemoperfusion nahekamen, durchgeführt. Dabei wurde ein maßgebender Einfluß der Partikelgröße auf die Sorptionsgeschwindigkeit und wirkliche Kapazität der Kolonne gefunden und erklärt.
    Notes: Three types of chemically different macroporous copolymers were investigated with respect to the possibility of their application as potential drug sorbents in blood detoxication and compared with activated charcoal which is used for this purpose in most cases. The measurements with a model drug solution were carried out in a dynamic arrangement under conditions resembling haemoperfusion. The effect of particle size of the sorbent on the rate of sorption and actual capacity of the column was detected and elucidated.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1985.051320106
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  • 8
    Electronic Resource
    Electronic Resource
    New radiopaque polyHEMA-based hydrogel particles (1997)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Biomedical Materials Research 34 (1997), S. 183-188 
    Details
    ISSN: 0021-9304
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine , Technology
    Notes: New iodine-containing polymeric hydrogel particles were prepared by suspension radical copolymerization of 2-hydroxyethyl methacrylate (HEMA), 3-(methacryloylamidoacetamido)-2,4,6-triiodobenzoic acid (MABA) and ethylene dimethacrylate (EDMA) in an aqueous medium using azobisisobutyronitrile as an initiator and magnesium hydroxide as a suspension stabilizer. To impart porosity to the product, cyclohexanol and 1-dodecanol were added as inert diluents to the polymerization mixture. Particles containing 27 wt % iodine produced radiopacity sufficient to observe a clearly visible X-ray image. The equilibrium swelling behavior of the particles in water was characterized. Swelling of the particles dramatically increased by converting the acid groups of MABA into their Na+ form. The more MABA the copolymer particle contain, the higher is their swelling in the Na+ form. © 1997 John Wiley & Sons, Inc.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
  • 9
    Electronic Resource
    Electronic Resource
    Uniform polymer beads of micrometer size (1996)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 47 (1996), S. 20-28 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Various methods are reviewed that have been developed in recent years to produce uniform polymer beads with diameter larger than 1 μm. Methods such as emulsifier-free emulsion polymerization, suspension polymerization (including non-standard polymerization devices and a method of activated swelling), dispersion polymerization, precipitation polymerization, and other techniques are covered. The discussion focuses on the mechanism of bead formation and variables influencing the properties of the beads. Potential applications of monosized beads in both industry and research are described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1996.010470103
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