6533b839fe1ef96bd12a58e4

RESEARCH PRODUCT

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

Walter Vogt

subject

chemistry.chemical_classificationchemistry.chemical_compoundMonomerchemistryPolymerizationInsertion reactionPolymer chemistryOrganic chemistryPolymerDynamic equilibrium

description

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.

https://doi.org/10.1002/macp.1977.021781201