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Title: Olefinic Thermoplastic Elastomer Gels: Combining Polymer Crystallization and Microphase Separation in a Selective Solvent

Since selectively swollen thermoplastic elastomer gels (TPEGs) afford a wide range of beneficial properties that open new doors to developing elastomer-based technologies, in this study we examine the unique structure-property behavior of TPEGs composed of olefinic block copolymers (OBCs). Unlike their styrenic counterparts typically possessing two chemically different blocks, this class of multiblock copolymers consists of linear polyethylene hard blocks and poly(ethylene-co-α-octene) soft blocks, in which case, microphase separation between the hard and the soft blocks is accompanied by crystallization of the hard blocks. We prepare olefinic TPEGs (OTPEGs) through the incorporation of a primarily aliphatic oil that selectively swells the soft block and investigate the resultant morphological features through the use of polarized light microscopy and small-/wideangle X-ray scattering. These features are correlated with thermal and mechanical property measurements from calorimetry, rheology, and extensiometry to elucidate the roles of crystallization and self-assembly on gel characteristics and establish useful structure-property relationships.
Authors:
 [1] ;  [1] ;  [2] ;  [3]
  1. North Carolina State Univ., Raleigh, NC (United States). Dept. of Chemical and Biomolecular Engineering
  2. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source
  3. North Carolina State Univ., Raleigh, NC (United States). Dept. of Chemical and Biomolecular Engineering, Materials Science and Engineering
Publication Date:
Grant/Contract Number:
AC02-06CH11357
Type:
Accepted Manuscript
Journal Name:
ACS Macro Letters
Additional Journal Information:
Journal Volume: 5; Journal Issue: 11; Journal ID: ISSN 2161-1653
Publisher:
American Chemical Society (ACS)
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
OSTI Identifier:
1392896

Armstrong, Daniel P., Mineart, Kenneth P., Lee, Byeongdu, and Spontak, Richard J.. Olefinic Thermoplastic Elastomer Gels: Combining Polymer Crystallization and Microphase Separation in a Selective Solvent. United States: N. p., Web. doi:10.1021/acsmacrolett.6b00677.
Armstrong, Daniel P., Mineart, Kenneth P., Lee, Byeongdu, & Spontak, Richard J.. Olefinic Thermoplastic Elastomer Gels: Combining Polymer Crystallization and Microphase Separation in a Selective Solvent. United States. doi:10.1021/acsmacrolett.6b00677.
Armstrong, Daniel P., Mineart, Kenneth P., Lee, Byeongdu, and Spontak, Richard J.. 2016. "Olefinic Thermoplastic Elastomer Gels: Combining Polymer Crystallization and Microphase Separation in a Selective Solvent". United States. doi:10.1021/acsmacrolett.6b00677. https://www.osti.gov/servlets/purl/1392896.
@article{osti_1392896,
title = {Olefinic Thermoplastic Elastomer Gels: Combining Polymer Crystallization and Microphase Separation in a Selective Solvent},
author = {Armstrong, Daniel P. and Mineart, Kenneth P. and Lee, Byeongdu and Spontak, Richard J.},
abstractNote = {Since selectively swollen thermoplastic elastomer gels (TPEGs) afford a wide range of beneficial properties that open new doors to developing elastomer-based technologies, in this study we examine the unique structure-property behavior of TPEGs composed of olefinic block copolymers (OBCs). Unlike their styrenic counterparts typically possessing two chemically different blocks, this class of multiblock copolymers consists of linear polyethylene hard blocks and poly(ethylene-co-α-octene) soft blocks, in which case, microphase separation between the hard and the soft blocks is accompanied by crystallization of the hard blocks. We prepare olefinic TPEGs (OTPEGs) through the incorporation of a primarily aliphatic oil that selectively swells the soft block and investigate the resultant morphological features through the use of polarized light microscopy and small-/wideangle X-ray scattering. These features are correlated with thermal and mechanical property measurements from calorimetry, rheology, and extensiometry to elucidate the roles of crystallization and self-assembly on gel characteristics and establish useful structure-property relationships.},
doi = {10.1021/acsmacrolett.6b00677},
journal = {ACS Macro Letters},
number = 11,
volume = 5,
place = {United States},
year = {2016},
month = {11}
}