Accession Number:

ADA137542

Title:

Properties of Multiphase Polyurethane Systems.

Descriptive Note:

Final rept. 1 Jul 82-30 Jun 83,

Corporate Author:

WISCONSIN UNIV-MADISON DEPT OF CHEMICAL ENGINEERING

Personal Author(s):

Report Date:

1983-07-01

Pagination or Media Count:

25.0

Abstract:

The incorporation of urea linkages in the polyurethane hard segment has a profound effect on the phase separation and domain structure of polyether polyurethaneureas PEUUs. This is due to the high polarity difference between the hard and soft segments and the likely development of a three dimensional hydrogen bonding network. A new series of PEUUs was synthesized from 4,4-diphenyl methane diisocyanate, ethylene diamine and polytetramethylene oxide PTMO. The molar ratios of the reactants and the soft segment PTMO molecular weight were varied to produce samples of varying hard segment content and block length. Previously 1981-82 we reported results of thermal, dynamic mechanical and tensile experiments on these materials. In the past year we have continued our investigation of these materials using IR spectroscopy.

Subject Categories:

  • Plastics
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE