Relationships between Polyurethane Elastomer Structure and Ageing Properties: Part 3: Effective Crosslink Structure

Abstract

The effect of varying chemical group structure on the properties of polyurethane elastomers has been investigated. The introduction of urea and biuret groups into polyester and polyether urethanes by the use of 4,4'- methylene bis-(2-chloroaniline), MOCA, yielded elastomers with superior physical properties to elastomers which contained predominantly urethane groups and were chain extended and/or crosslinked with diols and triols. The ageing properties of polyurethane elastomers cured with blends of MOCA and 1,1'1''-trimethylol propane (TMP) were equal to elastomers in which MOCA or TMP were the sole curing agents.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1971
Accession Number
AD0745983

Entities

People

  • B. E. Brokenbrow
  • D. Sims
  • John Wright

Tags

DTIC Thesaurus Topics

  • Chemical Bonds
  • Chemistry
  • Curing Agents
  • Elastomers
  • Hardness
  • Materials
  • Mechanical Properties
  • Methylenes
  • Mixtures
  • Molecular Weight
  • Physical Properties
  • Polyurethanes
  • Standards
  • Stress Strain Relations
  • Stresses
  • Tensile Properties
  • Tensile Strength

Fields of Study

  • Chemistry

Readers

  • Polymer Science and Engineering.