Phase Separated Microstructure and Structure-Property Relationships of High Strain Rate Elastomeric Polyureas

James Runt, Autchara Pangon, Alicia Castagna, Yong He, Mica Grujicic

Research output: Chapter in Book/Report/Conference proceedingChapter

4 Scopus citations

Abstract

The family of polyurea elastomers is of keen interest for the mitigation of blast and shock energy, particularly for protection against ballistic impact and traumatic brain injury. Polyureas are alternating copolymers, yet strong bidentate hydrogen bonding leads to nanoscale segregation of urea-containing "hard" segments. Compared with chemically similar polyurethane segmented copolymers, relatively little is known about the fundamental nanostructure (property) or thermal history relationships of polyureas. An overview of some of our work in this area is presented in this chapter. This includes the experimental investigation of the nanoscale morphology of common polyureas using a variety of experimental probes (including X-ray scattering), along with companion coarse-grained molecular level computational simulations of the nanoscale segregation and the unlike segment demixing process. Insights into polyurea molecular dynamics are also developed using broadband dielectric spectroscopy and dynamic mechanical analysis.

Original languageEnglish (US)
Title of host publicationElastomeric Polymers with High Rate Sensitivity
Subtitle of host publicationApplications in Blast, Shockwave, and Penetration Mechanics
PublisherElsevier Inc.
Pages5-16
Number of pages12
ISBN (Electronic)9780323354349
ISBN (Print)9780323354004
DOIs
StatePublished - Jun 25 2015

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Fingerprint Dive into the research topics of 'Phase Separated Microstructure and Structure-Property Relationships of High Strain Rate Elastomeric Polyureas'. Together they form a unique fingerprint.

Cite this