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  • 1
    Electronic Resource
    Electronic Resource
    Preparation of spherical polymer beads of maleic anhydride-styrene-divinylbenzene and metal sorption of its derivatives (1984)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 29 (1984), S. 2851-2856 
    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: Compounds having acid anhydride moiety have been used for starting materials for many useful derivatives. Spherical crosslinked polymer beads of porous maleic anhydride-styrene-divinylbenzene copolymer are obtained by suspension polymerization. Glycerol is found to be a preferable dispersant to make spherical beads. The beads contained 93% of the anhydride and 7% of the free carboxyls. As one of applications, the beads were hydrolyzed or reacted with anhydrous hydrazine, and the metal sorption behavior of them was examined. The hydrolyzed beads show a similar sorption manner as a conventional cation exchange resin having carboxylic acid groups, but the hydrazide beads sorbed mercury (II) selectively over a wide pH range. This investigation suggests a simple preparative method for the insoluble spherical porous beads of the maleic anhydride copolymer.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1984.070290915
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  • 2
    Electronic Resource
    Electronic Resource
    Synthesis and separation characteristics of strongly basic anion-exchange resins prepared from different monomers (1992)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 46 (1992), S. 517-522 
    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: Chloromethylstyrene-ethylene glycol dimethacrylate (EGDMA) copolymer beads (PCMS) and dimethylaminomethylstyrene-EGDMA copolymer (PDAMS) were synthesized by suspension polymerization as noble polymer matrices. The chemical and physical properties of the quaternized resins (PCMS-Q and PDAMS-Q) were approximately equal. The characteristics of both resins were examined by high-performance liquid chromatography using columns packed with the resins. These resins served as conventional anion-exchange resins for small organic anions, but indicated markedly different retention for large molecular anions, namely, PDAMS-Q retained proteins having a negative net charge, but PCMS-Q did not. It was suggested that the chemical and physical structures on the external surfaces of ion exchangers are very important in ion-exchange chromatography of proteins.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1992.070460318
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  • 3
    Electronic Resource
    Electronic Resource
    Letters to the Editor (1983)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 18 (1983), S. 442-448 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210181008
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  • 4
    Electronic Resource
    Electronic Resource
    New photoresists of cyclized butadlene polymers (1977)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 17 (1977), S. 372-376 
    Details
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    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: A new photoresist composed of cyclized cis-1, 4-polybutadiene has been developed. The resist has much higher sensitivity on exposure to ultraviolet light than the conventional resist from cyclized polyisoprene. This new resist has no resist-flow even at 250°C, and provides high resolution on baking at 200°C. Thermogravimetric analysis showed that the cyclized polybutadiene decomposes at temperature higher than cyclized polyisoprene.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760170608
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