Hydrolytic Network Structure Degradation in Multi-Component Polycyanurate Networks

Abstract

The relative simplicity of the chemical structure of polycyanuratenetworks, in combination with ease of analysis, allows for quantitativemodeling of hydrolytic degradation. These models link chemicalstructure, physical properties, and environmental conditions, whileallowing for validation. Hydrolytic degradation processes have been quantified forCu/nonylphenol-catalyzed, co-cured LECy/PT-30 networks, with andwithout additives for toughening, under exposure to hot water. Theeffects of conversion have been examined. Preliminary data shows rates of hydrolysis that are lower than for PT-30alone. Overall hydrolysis rates appear to be slightly higher at higherconversions, suggesting that carbamate formation is not responsible fora large portion of weight gain. Glass transition temperatures decrease gradually as expected.Determination of the effective network conversion reduction parameterrequires further work to distinguish carbamate formation from networkscission.

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Document Details

Document Type
Technical Report
Publication Date
Jul 28, 2016
Accession Number
AD1015132

Entities

People

  • Andrew J. Guenthner
  • Giuseppe R Palmese
  • Neil Redeker

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Air Force Research Laboratories
  • Body Weight
  • Carbamates
  • Chemical Reactions
  • Chemistry
  • Composite Materials
  • Copolymers
  • Degradation
  • Equations
  • Glass
  • Glass Transition Temperature
  • Hot Water
  • Hydrolysis
  • Military Research
  • Physical Properties
  • Transition Temperature

Readers

  • Data Mining and Knowledge Discovery.
  • Polymer Science and Engineering.
  • Theoretical Analysis.