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

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

doi:10.1016/B978-0-323-35400-4.00002-7

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 proceeding › Chapter

5 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 language	English (US)
Title of host publication	Elastomeric Polymers with High Rate Sensitivity
Subtitle of host publication	Applications in Blast, Shockwave, and Penetration Mechanics
Publisher	Elsevier Inc.
Pages	5-16
Number of pages	12
ISBN (Electronic)	9780323354349
ISBN (Print)	9780323354004
DOIs	https://doi.org/10.1016/B978-0-323-35400-4.00002-7
State	Published - Jun 25 2015

All Science Journal Classification (ASJC) codes

Engineering(all)

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10.1016/B978-0-323-35400-4.00002-7

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author = "James Runt and Autchara Pangon and Alicia Castagna and Yong He and Mica Grujicic",

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Phase Separated Microstructure and Structure-Property Relationships of High Strain Rate Elastomeric Polyureas. / Runt, James; Pangon, Autchara; Castagna, Alicia; He, Yong; Grujicic, Mica.

Elastomeric Polymers with High Rate Sensitivity: Applications in Blast, Shockwave, and Penetration Mechanics. Elsevier Inc., 2015. p. 5-16.

Research output: Chapter in Book/Report/Conference proceeding › Chapter

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AU - Pangon, Autchara

AU - Castagna, Alicia

AU - He, Yong

AU - Grujicic, Mica

N1 - Funding Information: The authors would like to express their appreciation to the Office of Naval Research (Contract 00014-09-1-1125) for support of this research.

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AB - 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.

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

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