Journal ArticleDOI
Polymere mit phosphor‐stickstoff‐bindungen, 6. Zur polymerisation von hexakis(2,2,2‐trifluorethoxy)cyclotriphosphazen bei anwesenheit von bortrichlorid
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TLDR
In this article, a mixture of polymeric phosphazenes containing imino dichloro and imino bis(trifluoroethoxy)phosphoranetrietriyle units was investigated by 31P NMR.Abstract:
Hexakis(2,2,2-trifluorethoxy)cyclotriphosphazene (1b) reacts with borontrichloride at elevated temperatures to give a mixture of polymeric phosphazenes containing imino dichloro and imino bis(trifluoroethoxy)phosphoranetriyle units. The reaction was investigated by 31P NMR. Separation of several fractions of polymers was achieved by hexane/benzene solvent extraction. Molecular weights have been determined by means of membrane and/or vapor pressure osmometry. A reaction mechanism is discussed.read more
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Book ChapterDOI
Nuclear Magnetic Resonance of Cyclophosphazenes
TL;DR: A comprehensive survey of the extensive 31 P NMR data accumulated for cyclophosphazenes is presented in this paper, with a focus on the 6-membered cyclotriphosphazene system.
Journal ArticleDOI
Fluorinated Polyphosphazenes: A Survey
TL;DR: A general survey of fluorinated phosphazene polymers starting from their synthesis in 1965 to recent times is presented in this article, where the characterization, properties and practical utilization of these compounds in different domains are critically discussed.
Patent
Polymerizable phosphazene derivatives: a process for preparing them and their uses
TL;DR: In this article, a polymerizable phosphazene derivative with a general structural formula was proposed, where the groups A and B are bonded to phosphorus atoms through --O--, --S--, NH--, or --NR-- (with R=C 1 -C 6 ) alkyl), and wherein A stands more precisely for a vinyl ether group or a styrene ether group, and B stands more specifically for a hydrocarbon group.
Journal ArticleDOI
The Conversion of Phosphoranimines to Polyphosphazenes in the Presence of Electrophiles
TL;DR: The application of electrophilic compounds as initiators for the polymerization of N-silylated phosphoranimines represents a new and rapid method for the synthesis of low to moderate molecular weight polyphosphazenes.
Book ChapterDOI
Ring-Opening Polymerization of Cyclic Phosphorus Monomers
TL;DR: In this paper, the ring-opening polymerization of cyclic organophosphorus compounds is discussed and the synthesis of polyphosphazenes and related polymers is discussed.