Synthesis of a Functionalized, Multiarm Spiropyran Mechanophore and Evaluation under Quasi-static and High-Rate Loading Conditions in Bulk PDMS

Abstract

Mechanophores have shown great utility in transforming normally destructive chemistry (bond scission) into productive outcomes. While many examples of mechanophores with two linkages to the polymeric backbone have been divulged in the literature, far less has been studied on mechanophores with four or more bonds to the backbone. In addition, no studies have been reported on the high-rate behavior characterization of these multiarm molecules. Here, we report the synthesis of a functionalized, four-arm spiropyran mechanophore and its incorporation into a bulk elastomeric material: polydimethylsiloxane (PDMS). Quasi-static tensile testing, as well as the first Kolsky bar (high-rate loading) experiments on these specimens, is discussed and compared with two-arm mechanophore substrates, as well as prior work conducted on mechanophore-embedded star polymers.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 2020
Accession Number
AD1111511

Entities

People

  • James Berry
  • Logan Shannahan
  • Müge Fermen-coker
  • Stephen L Craig
  • Yangju Lin

Organizations

  • Duke University
  • United States Army Research Laboratory

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Alkenes
  • Chemical Synthesis
  • Chemistry
  • Detection
  • Elastomers
  • Films
  • Images
  • Magnetic Resonance
  • Materials
  • Mechanical Properties
  • Military Research
  • Molecules
  • Nuclear Magnetic Resonance
  • Organic Chemistry
  • Polymers
  • Simulations
  • Synthetic Polymers

Readers

  • Mechanical Engineering/Mechanics of Materials.
  • Polymer Science and Technology
  • Quantum Chemistry