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  • Articles  (5)
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  • Chemistry  (5)
  • 1985-1989  (5)
  • Chemistry and Pharmacology  (5)
  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 160 (1988), S. 17-28 
    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: Der Einfluß der Zugabe von Bis(allylphenyl) Typ (TM 120)-Monomeren auf die Eigenschaften von unidirektional mit Carbonfasern verstärkten 4,4′-Bismaleimidodiphenylmethan (BM) - 2,4-Tolylendiamin (A) (1:0,3 Molverhältnis) (BM-A)-Verbundkörpern wird vorgestellt. Das Aushärteverhalten sowie das thermische Verhalten in Luft wurde mit Hilfe der Differentialkalorimetrie (DSC) und der Thermogravimetrie (TGA) untersucht. Die thermische Stabilität nimmt mit ansteigenden Konzentrationen von TM 120 deutlich zu. Demgegenüber steht ein Anstieg der Biegefesigkeit, der interlaminaren Scherfestigkeit sowie der Schlagzähigkeit mit zunehmender Monomerkonzentration. Optimale mechanische Eigenschaften wurden bei etwa 20 Tle./100 Tle. TM 120 erreicht.
    Notes: The paper deals with the effect of addition of bis(allylphenyl) type (TM 120) monomer on the properties of unidirectionally carbon fibre reinforced 4,4′ bismaleimidodi-phenyl methane (BM) - 2,4-tolylene diamine (A) (1:0.3 molar ratio) (BM-A) composites. The curing and thermal behaviour of the blends was investigated by using differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) in air atmosphere. A marginal decrease in thermal stability was observed with increasing concentration of TM 120. Flexural, interlaminar, and impact strength of the laminates increased in the presence of this monomer. Optimum mechanical properties were observed at ∼ 20 phr of TM 120.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 120 (1987), S. 1445-1446 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Ethylidenephosphorane - Ethenylfluorophosphorane (2λ5σ4P-λ5σ5P) Rearrangement2-Methoxy-1,3,2-dioxaphospholane (4) reacts with 2,2,4,4-tetrakis(trifluoromethyl)-1,3-dithietane (1) to furnish 2-methoxy-2-[2,2,2,-trifluoro-1-(trifluoromethyl)ethylidene]-1,3,2λ 5σ5-dioxaphospholane (6) which rearranges upon standing at ambient temperature to form 2-[2,2-difluoro-1-(trifluoromethyl)ethenyl]-2-fluoro-2-methoxy-1,3,2λ5σ5-dioxaphospholane (7).
    Notes: No Abstract
    Additional Material: 1 Tab.
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 121 (1988), S. 379-381 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Trapping Reactions for Unstable [1-Chloro-2,2,2-trifluoro-1-(trifluoromethyl)ethyl] Dialkyl PhosphitesThe reaction of ClP(OR)2 1a-d (R = Me, Et; R-R = CH2CH2, CMe2CMe2) with hexafluoroacetone yields the thermally unstable phosphites ClC(CF3)2OP(OR)2 4a-d besides other products. Trimethyl phosphite converts 4a-d into the phosphates (MeO)2P(O)OC(CF3)2P(OR)2 (R = Me, Et) 5a and b and the phosphonates (MeO)2P(O)C(CF3)2OP(OR)2 (R-R = CH2CH2, CMe2CMe2) 5c and d, Compounds formed in an Arbuzov reaction.
    Additional Material: 3 Tab.
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  • 4
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Pseudochalcogen Compounds. XVIII. Cyanamidolysis of Organophosphoryl-(phosphonyl-) chloridesCyanamidolytic reactions of organophosphoryl- and -phosphonyl chlorides are leading in dependence on the conditions of the reactions to metal-organo-cyanamidophosphates, M[(RO)2P(Y)NCN], and -cyanamidophosphonates, M[(RO)R'P(Y)NCN], M2[RP(Y)(NCN)2] respectively, as well as to the corresponding organo phosphoryl (phosphonyl) hydrogencyanamides, (RO)2P(Y)NHCN, (RO)R'P(Y)NHCN, RP(Y)(NHCN)2 and to Bis-(organophosphoryl)- and Bis-(organophosphonyl)-carbodiimides, (RO)2P(Y)-NCN-P(Y)(OR)2, (RO)R'P(Y)-NCN-P(Y)R' (OR). (Y: O, S). Conditions for synthesis as well as properties and structures of the new compounds are discussed on the basis of characteristic IR- and 31P-NMR-data.
    Notes: Cyanamidolysereaktionen an Organophosphoryl- und -phosphonyl-chloriden führen in Abhängigkeit von den gewählten Reaktionsbedingungen zu Metall-organo-cyanamidophosphaten, M[(RO)2P(Y)NCN], Metall-organo-cyanamidophosphonaten, M[(RO)R'P(Y)NCN], M2[RP(Y)(NCN)2] (Y: O, S), ferner zu den entsprechenden Organophosphoryl-(phosphonyl)-hydrogencyanamiden, (RO)2P(Y)NHCN, (RO)R'P(Y)NHCN, RP(Y)(NHCN)2 sowie zu Bis-(organophosphoryl)-carbodiimiden, (RO)2P(Y)—NCN—P(Y)(OR)2 und Bis-(organophosphonyl)-carbodiimiden, (RO)R'P(Y)-NCN-P(Y)R'(OR). Synthesebedingungen, Strukturen und Eigenschaften der neuen Verbindungen werden anhand der charakteristischen IR- und 31P-NMR-Daten diskutiert.
    Additional Material: 1 Tab.
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  • 5
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Bis(trimethylsilyl)phosphates of 1,1,1,4,4,4-Hexafluoro-2,3-bis(trifluoromethyl)-2,3-butanediol and 1,1,1,3,3-Pentafluoro-2-propenolThe monocyclic phosphorane (EtO)3P[OC(CF3)2C(CF3)2O] 1 was hydrolized to give a mixture of an acyclic and a cyclic phosphate, 3 and 4.The trihydroxyphosphorane 2 could not be obtained. Iodotrimethylsilane 6 converts 1 into the silylated derivative of 4 which was found also besides (Me3SiO)2P(O)OC(CF3)2C(CF3)2OSiMe3 8 in the reaction of 3 and 4 with Me3SiCl/(Me3Si)2NH. (Me3SiO)3P 10 and hexafluoroacetone did not yield the tris(trimethylsiloxy)phosphorane 5, but the phosphonate 11 which gave (Me3SiO)2P(O)OC(CF3) — CF2 12 upon heating with the loss of fluorotrimethylsilane.
    Notes: Das monozyklische Phosphoran (EtO)3P[OC(CF3)2C(CF3)2O] 1 hydrolysierte zu einem Gemisch zweier Phosphorsäureester, einem azyklischen 3 und einem zyklischer 4, ohne daß das Trihydroxyphosphoran 2 erhalten werden konnte.Iodtrimethylsilan 6 überführte 1 in das silylierte Derivat von 4, welches neben (Me3SiO)2P(O)OC(CF3)2OSiMe3 8 auch bei der Umsetzung von 3 und 4 mit Me3SiCl/(Me3Si)2NH entstand. Die Reaktion von (Me3SiO)3P 10 mit Hexafluoraceton ergab kein Tris(trimethylsiloxy)-phosphoran 5, sondern den Phosphonsäureester 11, der beim Erhitzen unter Fluortrimethylsilanabspaltung in (Me3SiO)2P(O)OC(CF3) — CF2 12 überging.
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