Understanding of Polyurethane Aerogel Block Chemistry on Energy Dissipation

Abstract

The objective of this research is to determine structure-property relationships of polyurethane-based aerogels during high thermal and kinetic energy events. We hypothesize that changes in hard segment structure of polyurethanes (PU) by modification of isocyanate architecture (aliphatic, cyclic, and aromatic) can create tunable impact and thermal energy dissipation mechanisms. By leveraging modeling efforts and synthesis approaches, a fundamental understanding of how these networks behave under extreme conditions of impact and heat will be investigated. The strain rate dependent behavior will be examined using quasi-static tensile and compression methods and the higher strain rate method of split-Hopkinson pressure bar, to determine if semi-rigid cyclic structured isocyanates enhance energy absorption. The development of structure-property relationships will lead to scientific and technical understanding of fundamental energy dissipation pathways, and new designs in multifunctional materials that will provide significant advancement in supporting ERDCs force protection efforts.

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Document Details

Document Type
Technical Report
Publication Date
Oct 24, 2022
Accession Number
AD1186961

Entities

People

  • Travis L. Thornell

Organizations

  • Engineer Research and Development Center

Tags

DTIC Thesaurus Topics

  • Acquisition
  • Chemistry
  • Copyrights
  • Data Acquisition
  • Data Management
  • Data Sets
  • Economic Security
  • Energy
  • Experimental Data
  • Force Protection
  • Intellectual Property
  • Kinetic Energy
  • Law
  • Materials
  • Security
  • Standards
  • Strain Rate

Readers

  • Distributed Systems and Data Platform Development
  • Mechanical Engineering/Mechanics of Materials.
  • Surface Coatings Technology.