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  • 1
    Electronic Resource
    Electronic Resource
    Fluorescent chemosensor for metal ions using a polymer having pendant pyridylbenzoxazole groups (2000)
    Springer
    Polymer bulletin 44 (2000), S. 79-84 
    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 A polymer having fluorescent pyridylbenzoxazole groups has been prepared for the purpose of detecting of metal ions. Metal ions such as Co2+, Ni2+, Cu2+ and Fe2+ were found to coordinate with the bipyridyl-like fluorescent benzoxazole chromophores. Among the metal ions investigated, the Fe2+ ion was shown to be the most effective in terms of its fluorescence quenching ability. The addition of a metal scavenger 2,2'-dipyridyl to the metal ion-quenched polymer solution resulted in the recovery of the fluorescence.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002890050576
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  • 2
    Electronic Resource
    Electronic Resource
    Synthesis and characterization of new soluble aromatic poly(ureaimide)s from N,N′-dimethyl-N,N′-bis(aminophenyl)ureas and aromatic tetracarboxylic dianhydrides (1998)
    Weinheim : Wiley-Blackwell
    Macromolecular Chemistry and Physics 199 (1998), S. 457-461 
    Details
    ISSN: 1022-1352
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: New poly(urea-imide)s having inherent viscosities of 0.26-0.57 dL/g were synthesized in two steps by ring-opening polyaddition of N,N′-dimethyl-N,N′-bis(aminophenyl)ureas to various aromatic tetracarboxylic dianhydrides giving poly(amic acid)s, followed by thermal cyclodehydration. All the poly(urea-imide)s showed amorphous patterns in the wide angle X-ray diffractograms. Most of the poly(urea-imide)s were soluble in organic solvents, especially phenolic solvents such as m-cresol and o-chlorophenol, and the polymers synthesized from the 3,4′-type diamine were more soluble than those from the 4,4′-type monomer. The glass transition temperatures and 10% weight loss temperatures under nitrogen of the poly(urea-imide)s were in the range of 218-263°C and 455-500°C, respectively.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    New microwave-assisted rapid synthesis of polyamides from nylon salts (1993)
    Basel : Wiley-Blackwell
    Die Makromolekulare Chemie, Rapid Communications 14 (1993), S. 481-484 
    Details
    ISSN: 0173-2803
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/marc.1993.030140804
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  • 4
    Electronic Resource
    Electronic Resource
    Synthesis and characterization of new soluble aromatic polyamides from diaminotetraphenylimidazolin-2-one and various aromatic dicarboxylic acid chlorides (1995)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 33 (1995), S. 1031-1037 
    Details
    ISSN: 0887-624X
    Keywords: diaminotetraphenylimidazolinone ; aromatic polyamides ; soluble aromatic polymers ; solubility ; thermal behavior ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Novel aromatic polyamides, having inherent viscosities of 0.76-2.31 dL/g, were synthesized by the low temperature solution polycondensation of a new highly phenylated diamine monomer having an imidazolinone group, 1,3-bis(4-aminophenyl)-4,5-diphenylimidazoline-2-one (TPIDA), with various aromatic diacid chlorides. All the polymers were amorphous, and most of the polyamides were readily soluble in organic solvents such as N-methyl-2-pyrrolidone, N,N-dimethylacetamide (DMAc), and m-cresol. Flexible and tough films could be prepared from the DMAc solutions of these soluble aromatic polyamides. The glass transition temperatures and 10% weight loss temperatures under nitrogen of the polyamides were in the range of 275-315°C and 430-505°C, respectively. © 1995 John Wiley & Sons, Inc.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pola.1995.080330705
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  • 5
    Electronic Resource
    Electronic Resource
    Synthesis and characterization of soluble aromatic polyurea-amides from new N,N′--dimethyl-N,N′-bis(aminophenyl)ureas and aromatic dicarboxylic acid chlorides (1995)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 33 (1995), S. 1039-1046 
    Details
    ISSN: 0887-624X
    Keywords: polyurea-amides ; N,N′-dimethylurea-based aromatic diamines ; solubility ; thermal behavior ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Aromatic polyurea-amides having inherent viscosities of 0.36-0.67 dL/g were synthesized by the low temperature solution polycondensation of new N,N′-dimethyl-N,N′-bis(aminophenyl)ureas with various aromatic dicarboxylic acid chlorides. All the polymers were amorphous, and most of them were soluble in a variety of organic solvents such as N-methyl-2-pyrrolidone, N,N-dimethylacetamide (DMAc), m-cresol, and pyridine. Some of the polymers could be cast from the DMAc solutions into transparent and flexible films having good tensile properties. The glass transition temperatures of the polyurea-amides obtained from the bis(4-aminophenyl)-substituted ureas were 244-272°C. The temperatures of 10% weight loss under nitrogen of the polymers were in the range of 430 and 480°C. © 1995 John Wiley & Sons, Inc.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pola.1995.080330706
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  • 6
    Electronic Resource
    Electronic Resource
    A facile cesium fluoride-mediated synthesis of aromatic polyethers from bisphenols and activated aromatic dihalides (1997)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 35 (1997), S. 2055-2061 
    Details
    ISSN: 0887-624X
    Keywords: CsF-mediated polycondensation ; aromatic polyethers ; bisphenols ; activated aromatic dihalides ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A facile method for the synthesis of high-molecular-weight aromatic polyethers was developed with the use of cesium fluoride as a base. The high-temperature solution polycondensation between bisphenols and activated aromatic dihalides with cesium fluoride in polar aprotic solvents readily afforded a series of aromatic polyethers having inherent viscosities of 0.5-1.0 dL/g under essentially neutral and milder reaction conditions, compared with the conventinal method using alkali hydroxides or alkali carbonates. © 1997 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 35: 2055-2061, 1997
    Additional Material: 4 Ill.
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  • 7
    Electronic Resource
    Electronic Resource
    Synthesis and characterization of new soluble aromatic polyimides from diaminotetraphenylimidazolinone and aromatic tetracarboxylic dianhydrides (1998)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 36 (1998), S. 1767-1772 
    Details
    ISSN: 0887-624X
    Keywords: diaminotetraphenylimidazolinone ; soluble aromatic polyimides ; solubility ; thermal behavior ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A series of new soluble aromatic polyimides with inherent viscosities of 0.65-1.12 dL/g were synthesized from 1,3-bis(4-aminophenyl)-4,5-diphenylimidazolin-2-one and various aromatic tetracarboxylic dianhydrides by the conventional two-step procedure that included ring-opening polyaddition and subsequent thermal cyclodehydration. These polyimides could also be prepared by the one-pot procedure in homogeneous m-cresol solution. Most of the tetraphenyl-pendant polyimides were soluble in organic solvents such as N,N-dimethylacetamide, 1,3-dimethyl-2-imidazolidone, and m-cresol. Some polyimides gave transparent, flexible, and tough films with good tensile properties. The glass transition temperatures and 10% weight loss temperatures under nitrogen of the polyimides were in the range of 287-326 and 520-580°C, respectively. © 1998 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 36: 1767-1772, 1998
    Additional Material: 1 Ill.
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  • 8
    Electronic Resource
    Electronic Resource
    Synthesis and properties of new soluble aromatic polybenzoxazoles from 4,4′-diamino-3,3′-dihydroxytriphenylamines and aromatic dicarboxylic acids (1998)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 36 (1998), S. 1987-1994 
    Details
    ISSN: 0887-624X
    Keywords: triphenylamine-based bis(o-aminophenol)s ; aromatic polybenzoxazoles ; solubility ; thermal behavior ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Two new triphenylamine-based bis (o-aminophenol) monomers, 4,4′-diamino-3,3′-dihydroxytriphenylamines, were successfully synthesized by the cesium fluoride-mediated condensation of 2-(benzyloxy)-4-fluoronitrobenzene with aniline derivatives, followed by simultaneous deprotection and reduction. Aromatic polybenzoxazoles having inherent viscosities of 0.58-1.05 dL/g were obtained by the low-temperature solution polycondensation of the bis(aminophenol)s with various aromatic dicarboxylic acid chlorides and the subsequent thermal cyclodehydration of the resultant poly(hydroxyamide)s. All the polybenzoxazoles were amorphous, and most of them were soluble in organic solvents such as m-cresol and o-chlorophenol. Flexible and tough films of polybenzoxazoles could be cast from the DMAc solutions of some aromatic poly(hydroxyamide)s, followed by thermal cyclodehydration. The glass transition temperatures and 10% weight loss temperatures of the polybenzoxazoles under nitrogen were in the range of 262-327 and 610-640°C, respectively. © 1998 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 36: 1987-1994, 1998
    Additional Material: 1 Ill.
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  • 9
    Electronic Resource
    Electronic Resource
    Synthesis and properties of new aromatic noncyclic poly(imide-amide)s from N,N-bis(aminobenzoyl)anilines and aromatic dicarboxylic acids (1998)
    Weinheim : Wiley-Blackwell
    Macromolecular Chemistry and Physics 199 (1998), S. 409-413 
    Details
    ISSN: 1022-1352
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Two dianilines containing the noncyclic N-phenylimide group, 4,4′- and 3,4′-diamino-(N,N-dibenzoylaniline), were synthesized as new diamine monomers. The low-temperature solution polycondensation of the diamines with aromatic dicarboxylic acid chlorides afforded poly(imide-amide)s with inherent viscosities of 0.14-0.44 dL/g. The noncyclic N-phenylimide unit in the diamines could be cleaved by nucleophilic attack at the amine function at high temperature. The noncyclic poly(imide-amide)s are soluble in polar solvents such as N,N-dimethylacetamide, N-methyl-2-pyrrolidone, and dimethyl sulfoxide. The polymers have glass transition temperatures and temperatures of 10% weight loss in air in the range of 195-265°C and 405-430°C, respectively.
    Additional Material: 2 Ill.
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  • 10
    Electronic Resource
    Electronic Resource
    Synthesis and characterization of new diphenylfluorene-based aromatic polyazomethines (1998)
    Weinheim : Wiley-Blackwell
    Macromolecular Chemistry and Physics 199 (1998), S. 1029-1033 
    Details
    ISSN: 1022-1352
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: New diphenylfluorene-based aromatic polyazomethines were synthesized via polycondensation of aromatic diamines with aromatic dialdehydes. The highest inherent viscosity of polyazomethines was obtained for solution polycondensation in m-cresol at room temperature under reduced pressure. The aromatic polyazomethines have inherent viscosities of 0.26-0.36 dL/g. All the polyazomethines are amorphous and most of them are highly soluble in various organic solvents, especially in tetrahydrofuran. Their glass transition temperatures (Tg) range from 249 to 335°C, and the temperatures of 10% weight loss are as high as 490∼535°C in air, indicating that these aromatic polyazomethines have high Tg and excellent thermal stability.
    Additional Material: 2 Ill.
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