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Polymere ester von säuren des phosphors, 6. Ringöffnende polymerisation cyclischer phosphite und phosphonite durch michaelis-arbuzov-reaktion.–Theorie zur struktur der hauptkette

✍ Scribed by Vogt, Walter

Publisher: Wiley (John Wiley & Sons)
Year: 1977
Weight: 535 KB
Volume: 178
Category: Article
ISSN: 0025-116X
DOI: 10.1002/macp.1977.021781201

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✦ Synopsis

Abstract

The hypothesis of Harwood and Patel, suggesting for the polymerization of 2‐phenyl‐1,3,2‐dioxaphospholane a type of insertion reaction to explain the formation of ethylenediphosphinic ester structures besides the normal 2‐hydroxyethyl(phenyl)phosphonic ester structures is extended to similar monomers and its theoretical consequences are examined. It is shown that in such a system mutual transformations between ω‐hydroxyalkyl‐P‐acid and alkylenedi(P‐acid)structures should occur, establishing a dynamic equilibrium and leading to a sort of azeotropic polymer, in which only one unique composition is kinetically stable. Equations relating to different kinetic parameters are deduced.

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Polymere ester von Säuren des phosphors,

Polymere ester von Säuren des phosphors, 5. Ringöffnende polymerisation des 2-phenoxy-1,3,2-dioxaphospholan durch Michaelis-Arbuzov-reaktion

✍ Vogt, Walter ;Ahmad, Nasim U. 📂 Article 📅 1977 🏛 Wiley (John Wiley & Sons) ⚖ 879 KB

## Abstract 2‐Phenoxy‐1,3,2‐dioxaphospholane (**14**) was polymerized by benzyl halogenides at temperatures between 120 and 200°C. It was found that the main chain consists predominantly of unexpected ethylene 1,2‐ethanediphosphonate units **7**; only about 10% of the monomer was incorporated as th