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  • 1
    Electronic Resource
    Electronic Resource
    Effect of polyethylene glycol with sensitizer groups at both ends on the photoinitiated polymerization of styrene in the water phase in the presence of a magnetic field (1993)
    s.l. : American Chemical Society
    Macromolecules 26 (1993), S. 1359-1362 
    Details
    ISSN: 1520-5835
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ma00058a025
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  • 2
    Electronic Resource
    Electronic Resource
    Block Copolymerization of Ethylene Oxide and Styrene by Sequential Initiation of an Anion and a Photoinduced Charge Transfer Complex (1995)
    s.l. : American Chemical Society
    Macromolecules 28 (1995), S. 4421-4425 
    Details
    ISSN: 1520-5835
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ma00117a010
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  • 3
    Electronic Resource
    Electronic Resource
    Block copolymerization of ethylene oxide and acrylonitrile and the influence of block length of polyacrylonitrile on the thermal behavior and morphology of block copolymer (1996)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 34 (1996), S. 1317-1324 
    Details
    ISSN: 0887-624X
    Keywords: bifunctional initiator ; phenoxo-anion ; charge transfer complex ; ethylene oxide ; acrylonitrile ; block copolymer ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A bifunctional initiator with the characteristics of anionic and charge transfer polymerization using p-aminophenol as parent compound is useful for synthesis of block copolymers. A block copolymer of ethylene oxide and acrylonitrile (PEO-b-PAN) is prepared by this method. In the first step, p-aminophenol potassium with protected amine group initiated polymerization of ethylene oxide (EO) to yield polyethylene oxide (PEO) with Schiffs base end groups. The charge transfer complexes (CTC) consisted of the PEO prepolymers with aniline group, which is formed by acidolysis of Schiffs base, and benzophenone (BP) initiated the polymerization of acrylonitrile under UV irradiation. Successful blocking has been confirmed by a strong change in the molecular weight of the prepolymer PEO and the block copolymer as well as IR, DSC, and NMR. The block copolymerization are strongly dependent on the polarity of the solvents. The effect of length of PAN block on glass transition temperature of PAN and the crystallinity of PEO block were discussed. © 1996 John Wiley & Sons, Inc.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Preparation of PEO with amine and sulfadiazine end groups by anion ring-opening polymerization of ethylene oxide (1996)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 34 (1996), S. 1933-1940 
    Details
    ISSN: 0887-624X
    Keywords: polyethylene oxide ; anionic polymerization ; aminoethanol ; amine ; sulfadiazine ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Polyethylene oxides with amine and sulfadiazine end groups (PEOa-sf) were prepared by alkoxy-anion ring-opening polymerization of ethylene oxide (EO); the potassium aminoethoxide with a protected amino group was used as initiator. The living polyethylene oxide anions was terminated by methanol first, then the separated polymer was continuously reacted to bromacetic acid in the presence of metal sodium. After that the purified intermediate was reacted sequentially with benzoyl chloride and sulfadiazine, then hydrolyzed with acetic acid. The final product PEOa-sf and all intermediates are characterized in detail by IR, NMR, GPC, and chemical analysis; the effect of reaction conditions on the preparation of polyethylene oxides with various functional end groups are discussed. © 1996 John Wiley & Sons, Inc.
    Additional Material: 6 Ill.
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  • 5
    Electronic Resource
    Electronic Resource
    Spontaneous alternating copolymerization of N-phenylmaleimide with ethyl α-phenylacrylate (1998)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 36 (1998), S. 2927-2931 
    Details
    ISSN: 0887-624X
    Keywords: N-phenylmaleimide ; ethyl α-phenylacrylate ; alternating copolymer ; contact-charge transfer complex ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The spontaneous copolymerization of N-phenylmaleimide (NPMI) (M1) with ethyl α-phenylacrylate (EPA)(M2) were carried out in dioxane at 85°C. A high alternating tendency was observed. The monomer reactivity ratios were r1 = 0.07 ±0.01 and r2 = 0.09 ± 0.02. The maximum copolymerization rate and molecular weight occurs at 70-80 mol% (M1) in feed ratio. The spontaneous alternating copolymerization is considered to be carried out via a contact-type charge transfer complex (CTC) formed between the monomers. Thermogravimetric analyses (TGA) indicate the resulting copolymers have high thermal stability. © 1998 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 36: 2927-2931, 1998
    Additional Material: 2 Ill.
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  • 6
    Electronic Resource
    Electronic Resource
    Copolymerization of ethyl α-(hydroxymethyl)acrylate with maleimide and characterization of the resulting copolymer (1998)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 36 (1998), S. 1291-1299 
    Details
    ISSN: 0887-624X
    Keywords: copolymerization ; maleimide ; ethyl α-(hydroxymethyl)acrylate ; characterization ; incomplete crystallinity ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Copolymerization of maleimide (MI) and ethyl α-(hydroxymethyl)acrylate (EHMA) was performed at 60°C with AIBN as the initiator in THF. The monomer reactivity ratios were determined as r1 (MI) = 0.13 and r2 (EHMA) = 2.20. As the molar fraction of MI in the monomer feed increased, the initial rate of copolymerization decreased. TGA diagrams suggested the crosslinking reaction of the copolymer on heating. DSC and WAXD results suggested the existence of incomplete crystallinity in the copolymer. © 1998 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 36: 1291-1299, 1998
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Synthesis and characterization of amphiphilic diblock copolymer of polystyrene and polyvinyl alcohol using ethanolamine-benzophenone as photochemical binary initiation system (1998)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 36 (1998), S. 109-115 
    Details
    ISSN: 0887-624X
    Keywords: block copolymer ; polystyrene ; polyvinyl alcohol ; polyvinyl acetate ; charge-transfer complex ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Amphiphilic diblock copolymers of polyvinyl alcohol (PVA) and polystyrene (PS), which are very difficult to prepare by common polymerization methods, have been obtained by initiation of the polymerization of styrene and vinyl acetate successively, followed by hydrolysis, using the ethanolamine-benzophenone (BP) charge-transfer complex (CTC). The effects of solvents, concentration of monomer, BP, ethanolamine, and PS prepolymer, with a reactive imino group (PSa), on the photo-induced charge-transfer polymerization (CTP) of St and block copolymerization of VAc are discussed. The copolymer of PS-b-PVAc and the hydrolyzed product, PS-b-PVA, were characterized by FTIR, NMR, and GPC in detail. The effect of PS chain length on the crystallization of PVA was described. © 1998 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 36: 109-115, 1998
    Additional Material: 9 Ill.
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  • 8
    Electronic Resource
    Electronic Resource
    Syntheses of polyethylene glycol (PEG) with different functional groups at each end. I. Preparation of monotrityl PEG using polyvinyl alcohol (PVA) matrixThis is a part of postdoctoral work done by the author in the Department of Chemistry, University of Oslo, Norway. (1992)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 46 (1992), S. 1663-1671 
    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 syntheses and separation of monotrityl PEGs with molecular weights in the range of 400-6000 were successful using PVA as matrix. The yield of monotrityl PEG is strongly dependent on the initial mole ratio of PEG - trityl chloride. It is observed that satisfactory results can only be obtained in the range of 1 : 1.7 to 1 : 2.4 (mole number of PEG/mole number of trityl chloride). The effect of reaction conditions on monosubstitution is discussed. © 1992 John Wiley & Sons, Inc.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1992.070460915
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  • 9
    Electronic Resource
    Electronic Resource
    The synthesis of polyethylene glycol (PEG) with different functional groups at each end. II. Synthesis of a series of monosubstituted PEG via polyvinyl alcohol (PVA) as support (1993)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 47 (1993), S. 1503-1511 
    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: Five monosubstituted PEGs with different mol wt were synthesized and isolated using PVA as support. They were , respectively. The structure of these monosubstituted PEGs was characterized by IR, NMR, and element analysis. The effect of the reaction conditions on monosubstitution of PEGs was described. © 1993 John Wiley & Sons, Inc.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1993.070470901
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  • 10
    Electronic Resource
    Electronic Resource
    Cyclopolymerization of dodecanidiol dimethacrylate and identification of polymer structure (1995)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 56 (1995), S. 1253-1261 
    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: Dodecanidiol dimethacrylate (DDMA) was polymerized by a cyclization mechanism in low monomer concentration (0.075-0.5 mol/L) and high AIBN concentration (0.44-1.76 × 10-2). The linear soluble polymer was formed even if the conversion of DDMA was as high as 25.6%. The glass transition temperature of cyclized polyDDMA (PDDMA) is about 4.5°C, which is 65°C higher than its homolog - poly(dodecyl methacrylate). The structure of the polymer was established by infrared and 1H- and 13C-NMR spectroscopy. The head-to-tail contents in cyclized PDDMA, i.e., the formation of a 20-membered ring, is predominant compared with those of head-to-head contents of a 19-membered ring. © 1995 John Wiley & Sons, Inc.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1995.070561008
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