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  • 1
    Electronic Resource
    Electronic Resource
    Poly[N-(hydroxyethyl)ethyleneimine-co-phenyl succinic anhydride] Synthesis and structure (1999)
    Springer
    Polymer bulletin 43 (1999), S. 341-347 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary Five copolymers from N-(hydroxyethyl)ethyleneimine as nucleophilic monomer and phenylsuccinic anhydride (PhSAn) as electrophilic monomer, were synthesized according to the spontaneous copolymerization concept. These copolymers were characterized by elemental analysis, FT-IR, 1H-NMR, and 13C-NMR spectroscopy. The copolymer composition determined from the 1H-NMR spectra showed that the copolymers are not alternating. According to all the data, it was suggested a copolymer structure which includes ester and anhydride bonds. The molecular weights determined by vapor pressure osmometry ranged between 5.100 and 6.100 g/mol.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002890050620
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  • 2
    Electronic Resource
    Electronic Resource
    Spontaneous copolymerization of N-(2-hydroxyethyl)ethyleneimine with maleic anhydride (1996)
    Springer
    Polymer bulletin 36 (1996), S. 415-422 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary The copolymerization of N-(2-hydroxyethyl)ethyleneimine, (HEEI) as nucleophilic monomer and maleic anhydride (MA) as electrophilic monomer in the absence of initiator in acetonitrile was investigated. Copolymers were characterized by IR, 1H-NMR and 13C-NMR spectroscopy. The copolymer composition depends on the monomer ratio in the feed, determined by 1H-NMR spectroscopy. The presence of MA bridges between copolymer chains was established by spectroscopic analysis. At lower temperature the yield and molecular weight of copolymers decrease as well as the MA unit content in the copolymer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00315057
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  • 3
    Electronic Resource
    Electronic Resource
    Spontaneous copolymerization via zwitterion (1983)
    Springer
    Polymer bulletin 9 (1983), S. 417-422 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary The copolymers obtained by the spontaneous reaction between 2-methyl-oxazoline (MN) and succinic anhydride (ME) are analyzed. The copolymerization takes place at 45 °C in CH3CN without added initiator. The composition of the copolymer was determined by 1H-NMR and 13C-NMR. The scheme of the copolymerization was presented. The genetic zwitterion is not the only species responsible for the propagation as it is deduced from the composition of the copolymers obtained, although its participation in the propagation is important.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00265322
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  • 4
    Electronic Resource
    Electronic Resource
    Poly(N-vinylpyrrolidone) as metal ion liquid-liquid extractant (2000)
    Springer
    Polymer bulletin 45 (2000), S. 425-429 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: SUMMARY Poly(N-vinylpyrrolidone) (PVP) was investigated as a novel extracting agent. The metal ion extraction properties for Cu(II), Co(II), Ni(II), Cd(II), Zn(II), Pb(II), Hg(II), Cr(III) and Fe(III) were investigated using the liquid-liquid solvent extraction technique (bath method). The metal ion interactions with the polymer were determined as a function of the pH as well as the kinetic characteristic and stripping. For copper ions pH 4 was the optimum extracting pH value, and the 2M hydrochloride acid was better than nitric acid as a stripping agent.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002890070017
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  • 5
    Electronic Resource
    Electronic Resource
    Racemic poly(α-alkyl-α-phenyl-βpropiolactone) substituent dependence (1982)
    Springer
    Polymer bulletin 6 (1982), S. 515-519 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary The α-phenyl-α-alkyl-β-propiolactones (alkyl groups =-CH2CH3; -CH2CH2CH3; -CH2CH2CH2CH3) were synthesized and polymerized by anionic ring-opening polymerization by tetra-ethylammonium benzoate (non-chiralic initiator). It was found that the molecular weight of polylactones increased as the size of the alkyl substituent increased. Poly(α-propyl-α-phenyl-β-propiolactone) showed the highest melting temperature. Lactones polymerized using tetraethylammonium dibenzoiltartrate (chiralic initiator) gave polyesters with higher melting temperature than those obtained with a non-chiralic initiator under the same conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00256372
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  • 6
    Electronic Resource
    Electronic Resource
    Copolymerization via zwitterion 3. Phthalic anhydride and 2-ethyl-2-oxazoline (1985)
    Springer
    Polymer bulletin 13 (1985), S. 65-70 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary Copolymers of 2-ethyl-2-oxazoline and phtalic anhydride without initiator in DMF at 60 °C were synthesized. The copolymers were statistical, rich in 2-ethyl-2-oxazo1ine. A partial hydrolisis of pendant groups -COCH2CH3 is observed. The composition and the hydrolisis degree of the copolymers was determined by 1H-NMR. A copolymerization scheme via zwitterion is proposed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00264242
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  • 7
    Electronic Resource
    Electronic Resource
    Copolymerization via zwitterion (1990)
    Springer
    Polymer bulletin 23 (1990), S. 171-175 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary Copolymers of N-phenylmaleimide and ethyleneimine were synthesized in acetonitrile in the absence of initiator. The copolymers are insoluble in solvents such as DMF, CHCl3, DMSO, CH3OH, H2O. The copolymer composition as determined by elemental analyses depends on the initial monomer ratio. The thermal stability of copolymers was studied.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00338497
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  • 8
    Electronic Resource
    Electronic Resource
    Copolymerization without initiator ofN-(2-hydroxyethyl)ethyleneimine with succinic anhydride (1995)
    Springer
    Polymer bulletin 35 (1995), S. 271-277 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary Copolymers of N-(2-hydroxyethyl)ethyleneimine and succinic anhydride without initiator were prepared under different experimental conditions. The composition of the copolymers was determined by elemental analyses and1H-NMR spectroscopy. From the results of FT-IR and1H-NMR spectroscopy a scheme of copolymerization via zwitterion is presented which includes an esterification reaction of the pendant hydroxylic groups.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00963123
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  • 9
    Electronic Resource
    Electronic Resource
    Spontaneous copolymerization of N-(2-hydroxyethyl)ethyleneimine with isatoic anhydride (1997)
    Springer
    Polymer bulletin 39 (1997), S. 407-414 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract. The polymerization of isatoic anhydride (electrophilic monomer) with N-(2-hydroxyethyl)ethyleneimine (nucleophilic monomer) was studied in the absence of added initiator at different feed monomer concentrations, temperature, and time of copolymerization. The copolymers were characterized by FT-IR, 1H-NMR and 13C-NMR spectroscopy, and TGA. Based on spectroscopic data and copolymer composition, a copolymer structure was suggested.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002890050166
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  • 10
    Electronic Resource
    Electronic Resource
    Copolymerization via zwitterion (1984)
    Springer
    Polymer bulletin 11 (1984), S. 465-470 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary Copolymers of 2-methyl-2-oxazoline and phtalic anhydride without initiator were prepared at 60°C in DMF, CH3CN and in bulk. The copolymers were statistical rich in 2-methyl-2-oxazoline and the -COCH3 groups are partially hydrolized. The composition and the degree of hydrolysis of the copolymers were determined by 1H-NMR. 13C-NMR proved that the hydrolisis did not occur during the polymerization process. A scheme of copolymerization via zwitterion is presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00265489
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