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  • 1
    Electronic Resource
    Electronic Resource
    Synthesis of Liquid Crystalline Organometallic Poly(arylene)s Containing 1,3-Type (η4-Cyclobutadiene)cobalt Moieties in the Main Chain (2000)
    Springer
    Journal of inorganic and organometallic polymers and materials 10 (2000), S. 221-230 
    Details
    ISSN: 1572-8870
    Keywords: poly(arylene)s ; polycondensation ; organocobalt polymer ; liquid crystal
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Novel organometallic poly(arylene)s containing 1,3-type (cyclobutadiene)cobalt moieties in the main chain were prepared by the Ni(0)-mediated dehalogenative polycondensation of monomers having (cyclobutadiene)cobalt moieties. The resulting poly(arylene)s were partly soluble in organic solvents and the number-average molecular weights (M n) of soluble fractions were estimated to be 16,700–22,000 by GPC. The polymers showed the formation of a π-conjugated structure, good solubility in common organic solvents, and thermotropic liquid crystallinity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1016642806991
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  • 2
    Electronic Resource
    Electronic Resource
    Polycondensation of ο-hydroxy carboxylic acid derived from L-phenylalanine and ethylene carbonate (1996)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 34 (1996), S. 1819-1822 
    Details
    ISSN: 0887-624X
    Keywords: cyclic carbonate ; L-phenylalanine ; ο-hydroxy carboxylic acid ; polycondensation ; DCC ; DMAP ; poly(ester-urethane) ; 1-methyl-2-fluoropyridinium salt ; trypsin ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Polycondensations of dicarboxylic acids and diols derived from optically active amino alcohols (1997)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 35 (1997), S. 2925-2934 
    Details
    ISSN: 0887-624X
    Keywords: diol ; optically active amino alcohol ; polycondensation ; poly(ester-amide) ; even-odd effect ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Polycondensations of dicarboxylic acids with diols having amide moieties derived from optically active amino alcohols were carried out. Polymers with Mns 8,700-17,400 were obtained by the polycondensations using 1.2 eq. of 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride (EDC·HCl) in DMF at room temperature for 8 h in satisfactory yields. The Tg of the polymer rose with decrease of the methylene chain length of the dicarboxylic acid. In the Tgs of the polymers from L-leucinol, even-odd effect was observed with increase of the methylene chain length of the dicarboxylic acid. The molecular rotation values of the polymers were constant except for the polymer from succinic acid, which showed the negatively largest one. © 1997 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 35: 2925-2934, 1997
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Polycondensations of hydroxycarboxylic acids derived from optically active aminoalcohols and acid anhydrides - syntheses of functional poly(ester-amide)s (1997)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 35 (1997), S. 345-352 
    Details
    ISSN: 0887-624X
    Keywords: hydroxycaboxylic acids ; optically active aminoalcohol ; polycondensation ; poly(ester-amide) ; hydrolytic degradation ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Syntheses and polycondensations of optically active hydroxycarboxylic acids prepared from acid anhydrides and aminoalcohols were carried out. Novel polymers with M̄n 9900-27,200 were obtained by the polycondensations of hydroxycaboxylic acids derived from maleic or succinic acid using 1.2 eq. of 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride (EDC · HCl) in DMF (2M) at room temperature for 8 h in satisfactory yields. Meanwhile, a hydroxycarboxylic acid obtained from phthalic acid afforded no polymer but a phthalimide derivative. The radical additions of ethanethiol or mercaptoethanol with the polymers derived from maleic anhydride proceeded smoothly in satisfactory incorporation ratios (65-98%), respectively. The polymer obtained from succinic anhydride and 2-aminoethanol showed hydrolytic degradability. © 1997 John Wiley & Sons, Inc.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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