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  • 1
    Electronic Resource
    Electronic Resource
    Thermostable polyesters containing imide and phenylquinoxaline units (1992)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 194 (1992), S. 179-187 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Thermisch stabile, heterocyclische Polyester mit Imid- und Phenylchinoxalingruppen wurden durch Lösungspolykondensation von Bis(hydroxyphenylchinoxalin)-Derivaten mit Dicarbonsäuredichloriden oder von Bis(aminophenylchinoxalin)-Derivaten mit Estergruppen enthaltenden Dicarbonsäureanhydriden hergestellt. Die thermische Stabilität dieser Polymeren wird diskutiert und mit der von verwandten heterocyclischen Polymeren verglichen. Elektrische Eigenschaften der Polykondensate wurden ebenfalls untersucht.
    Notes: Thermostable, heterocyclic polyesters containing imide and phenylquinoxaline units have been synthesized by solution polycondensation of bis(hydroxyphenylquinoxaline) derivatives with diacid dichlorides containing preformed imide rings or by the reaction of bis(aminophenylquinoxaline) derivatives with dianhydrides containing ester groups. The thermal stability of these compounds is discussed and compared with related heterocyclic polymers. Electrical properties of the polycondensates were also studied.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1992.051940114
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  • 2
    Electronic Resource
    Electronic Resource
    Preparation and properties of poly(p-nitrophenylquinoxaline-imide-amide)s (1991)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 193 (1991), S. 113-118 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Durch Polykondensation von α,ω-Diaminen mit p-nitrophenylsubstituierten Chinoxalingruppen und α,ω-Dicarbonsäuredichloriden mit Imidringen wurden neue thermostabile Polymere erhalten, die sowohl substituierte Chinoxalin-Gruppen und Imid-Ringe als auch flexible Amid-Funktionen enthalten. Diese Polymeren weisen eine im Vergleich zu entsprechenden Polymeren ohne Nitrogruppen bessere Löslichkeit auf; sie sind außerdem thermisch sehr stabil und verfügen über gute elektrische Isolationseigenschaften.
    Notes: New thermostable polymers containing p-nitrophenyl substituted quinoxaline units and imide rings as well as flexible amide groups have been synthesized by polycondensation reaction of a diaminoquinoxaline derivative carrying p-nitrophenyl substituents with diacid dichlorides incorporating preformed imide cycles. These polymers show better solubility compared to related products which do not contain nitro groups. They have also a high thermal stability and good electrical insulating properties.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1991.051930111
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  • 3
    Electronic Resource
    Electronic Resource
    Poly(1,3,4-oxadiazole-amide)s containing pendent imide groups (1996)
    New York, NY : Wiley-Blackwell
    Polymers for Advanced Technologies 7 (1996), S. 847-852 
    Details
    ISSN: 1042-7147
    Keywords: polyoxadiazoles ; pendent imide groups ; 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
    Notes: A series of new poly(1,3,4-oxadiazole-amide)s containing pendent imide groups has been synthesized by solution polycondensation of aromatic diamines containing preformed 1,3,4-oxadiazole rings with two diacid chlorides containing imide rings. These polymers were also prepared by the reaction of the same diacid chlorides with p-aminobenzhydrazide which were subsequently cyclodehydrated in solid state. The polymers were soluble in polar amidic solvents and some of them gave transparent flexible films by casting from solutions. They showed high thermal stability with decomposition temperatures above 400°C and glass transition temperatures in the range of 245-327°C. They had low dielectric constants, in the range of 3.32-3.94, and good tensile properties.
    Additional Material: 5 Tab.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Synthesis of new poly(phenylquinoxaline-ester-imide)s (1991)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 42 (1991), S. 125-128 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Neue Poly(phenylchinoxalinesterimid)e wurden synthetisiert durch Lösungspolykondensation von vorgebildete Estergruppen enthaltenden Anhydriden mit aromatischen Diaminen, die phenylsubstituierte Chinoxalin-Einheiten enthielten. Die thermische Stabilität und die dielektrischen Eigenschaften dieser Verbindungen werden diskutiert und mit denen ähnlicher heterocyclischer Polymere verglichen.
    Notes: New poly(phenylquinoxaline-ester-imide)s have been synthesized by solution polycondensation of certain dianhydrides containing performed ester groups with aromatic diamines incorporating phenyl-substituted quinoxaline units. The thermal stability as well as the dielectric properties of these compounds are discussed and compared with those of related heterocyclic polymers.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1991.010420220
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  • 5
    Electronic Resource
    Electronic Resource
    Preparation and characterization of novel poly(phenylquinoxaline-imide-amide)s (1992)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 43 (1992), S. 46-49 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Poly(phenylchinoxalin-imid-amid)e wurden hergestellt mittels Tieftemperatur-Lösungspolykondensation von aromatischen Diaminen, die vorgebildete Phenylchinoxalineinheiten sowie Amid-und Imidgruppen enthielten, mit Disäurechloriden bestimmter, Imidringe enthaltender Dicarboxylsäuren. Die Polymere sind in polaren aprotischen Lösungsmitteln leicht löslich und ermöglichen die Herstellung von transparenten Filmen mit hoher thermischer Stabilität und gutem elektrischen Isolationsverhalten.
    Notes: Poly(phenylquinoxaline-imide-amide)s have been prepared by low-temperature solution polycondensation of aromatic diamines containing preformed phenylquinoxaline units and amide or imide groups with diacid chlorides of certain dicarboxylic acids incorporating imide rings. These polymers are easily soluble in polar aprotic solvents and give transparent films with high thermal stability and good electrical insulation properties.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1992.010430110
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  • 6
    Electronic Resource
    Electronic Resource
    Synthesis of new poly(phenylquinoxaline-imide-amides) (1988)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 39 (1988), S. 409-412 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Neue thermostabile Polymere, die phenylsubstii uicrtc Cliinoxaline sowic Imid- und Amidstruktureinheiten enthalten, wurdcn durch Polykondcnsatioii in Losung bci niedriger Tcmperatur der Diaminophenylchinoxaline mit sechsgliedri-gen Imidringen und Disaureclrloridcn rnit funfgliedrigen Iniidringen erhaltcn. Weiterhin wurden Poly(pheny1-chinoxa-lin-co-oxadiazol-imid-amide) aus dense1t'eii Monorncrcii nnd 2,5-Bis(p-aminopheny1)-1,3,4-oxadiazol dargestellt. Die thermisc tic Stabilitat und die elektrisclicn Eigenscliaften dieser Polymere werden diskutiert.
    Notes: New thermostable polymers conlaining plieiiSlsubstitutet1 quiiioxaline and both imide and amide units have been synthesized by low tempera lure solution polycondensation of a diarninophcnylquinoxaline incorporating six-membered imide rings with diacid chlorides containing five-rncmbercd irnide rings. Also, poly(phenylquinoxa1ine-co-oxadiazole-irnidc-amides) havc been prepared using Lhe same mononicrs and 2,5-bis(p-arninophenyl)-1,3,4-oxadiazole. The thermal stability as well as electrical insulating properties of tlicse polyrnvrs arc discussed.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1988.010390802
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  • 7
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    Investigations on optical, structural and thermal properties of phosphate glasses containing terbium ions (2013)
    Institute of Physics (IOP)
    Details
    Publication Date: 2013-12-14
    Description: Aluminophosphate glasses belonging to the Li 2 O–BaO–Al 2 O 3 – La 2 O 3 –P 2 O 5 system doped with Tb 3+ were prepared and investigated. Methods as Induced Coupled Plasma-Mass Spectrometry (ICP-MS), Induced Coupled Plasma-Atomic Emission Spectroscopy (ICP-AES) and X-ray diffraction (XRD) have been used to establish the elemental composition of these vitreous materials. The influence of the Tb 3+ ions on the optical properties of the phosphate glasses has been investigated in relation with the structural characteristics of the vitreous matrix. The optical behavior has been studied by ultra-violet-visible (UV–Vis) spectroscopy, revealing electronic transitions specific for terbium ions. Fluorescence spectroscopy measurements have been performed by excitation in the UV and visible domains (377 nm and 488 nm) which resulted in the most significant fluorescence peaks in the Vis domain (540 and 547 nm...
    Print ISSN: 1757-8981
    Electronic ISSN: 1757-899X
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Institute of Physics (IOP)
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  • 8
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    Neutralising the influence of spread on the diameter of processed holes by means of surface plastic deformation (1999)
    Elsevier
    Details
    Publication Date: 1999-03-01
    Print ISSN: 0924-0136
    Electronic ISSN: 1873-4774
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Elsevier
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