Inorganic Coordination Polymers. XVIII. Observations on Brittle and Flexible Films of (Cr((OP(CH3)(C6H5)O)2)(OP((C8H17)2)O))x.

Abstract

Films of Cr(OP(CH3)(C6H5)O)2(OP(C8H17)2O))x, formed during the reaction of (Cr(OH)(OP(CH3)(C6H5)O)2)x with dioctylphosphinic acid, are either brittle or flexible depending on the details of the preparation of the chromium(III) bis(phosphinate) precursor. Both kinds of film appear to contain mainly triple-bridged chains. Differing degrees of randomness in distribution of the two kinds of phosphinate bridges and, hence, of the internally plasticizing octyl groups along the chain account for the observed differences in flexibility, X-ray diffraction patterns, and birefringence. The observed intrinsic viscosities of 9-18 dl/g indicate that these tris(phosphinates) form microgels rather than true solutions. The thermal degradation of these films proceeds by the oxidation and cleavage of the organic side groups. Addition of antioxidants to the flexible films significantly increases the longevity of their flexibility at 200C.

Document Details

Document Type
Technical Report
Publication Date
May 01, 1975
Accession Number
ADA010554

Entities

People

  • B. P. Block
  • H. D. Gillman
  • Piero Nannelli

Tags

DTIC Thesaurus Topics

  • Antioxidants
  • Birefringence
  • Chromium
  • Degradation
  • Diffraction
  • Observation
  • Oxidation
  • Phosphinates
  • Physical Properties
  • Precursors
  • Resilience
  • Viscosity
  • X Rays
  • X-Ray Diffraction

Fields of Study

  • Chemistry

Readers

  • Organic Chemistry
  • Polymer Science and Technology
  • Theoretical Analysis.