Structure-Property Relationships in Thermoplastic Elastomers. I. Segmented Polyether-Polyurethanes.

Abstract

Segmented poly(ether-b-urethanes) have been synthesized with 2000 MW polypropylene oxide coupled with diisocyanates and diol type chain extenders. The diisocyanates used were symmetric rigid 4,4'-diphenylmethane diisocyanate (MDI), linear aliphatic hexamethylene diisocyanate (HDI) and unsymmetric rigid toluene-2,4-diisocyanate (TDI). The chain extenders were symmetric N,N'-bis(2-hydroxyethyl) terephthalamide (BT) and N,N'-bis(2-hydroxyethyl)-hydroquinone (BH) unsymmetric N,N'-bis(2-hydroxyethyl)isophthalamide, and linear aliphatic butanediol. Hard segment contents ranged from 20 to 40 wt %. The thermal behavior of these materials is consistent with phase separation into separate hard and soft domains.

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Document Details

Document Type
Technical Report
Publication Date
Oct 26, 1984
Accession Number
ADA148043

Entities

People

  • C. P. Lillya
  • E. J. Woo
  • G. Farber
  • J. C. W. Chien
  • R. Farris

Organizations

  • University of Massachusetts Amherst

Tags

DTIC Thesaurus Topics

  • Biomedical And Dental Materials
  • Block Copolymers
  • Body Weight
  • Chemical Synthesis
  • Chemistry
  • Copolymers
  • Elastomers
  • Materials
  • Materials Science
  • Mechanical Properties
  • Molecular Weight
  • Phase
  • Phase Separation
  • Polymer Chemistry
  • Polymeric Films
  • Polymers
  • Transitions

Fields of Study

  • Chemistry

Readers

  • Organic Chemistry
  • Polymer Science and Technology