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

Armstrong, Daniel P.; Mineart, Kenneth P.; Lee, Byeongdu; Spontak, Richard J.

doi:10.1021/acsmacrolett.6b00677

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

Journal Article · Tue Nov 01 00:00:00 EDT 2016 · ACS Macro Letters

DOI:https://doi.org/10.1021/acsmacrolett.6b00677· OSTI ID:1392896

Armstrong, Daniel P. ^[1]; Mineart, Kenneth P. ^[1]; Lee, Byeongdu ^[2]; Spontak, Richard J. ^[3]

North Carolina State Univ., Raleigh, NC (United States). Dept. of Chemical and Biomolecular Engineering
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source
North Carolina State Univ., Raleigh, NC (United States). Dept. of Chemical and Biomolecular Engineering, Materials Science and Engineering

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.

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Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1392896

Journal Information:: ACS Macro Letters, Vol. 5, Issue 11; ISSN 2161-1653

Publisher:: American Chemical Society (ACS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 7 works

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Crystallization-Directed Anisotropic Electroactuation in Selectively Solvated Olefinic Thermoplastic Elastomers: A Thermal and (Electro)Mechanical Property Study Armstrong, Daniel P.; Spontak, Richard J. Advanced Functional Materials, Vol. 28, Issue 36 https://doi.org/10.1002/adfm.201803467	journal	July 2018
Dielectric and Resistive Heating of Polymeric Media: Toward Remote Thermal Activation of Stimuli‐Responsive Soft Materials Armstrong, Daniel P.; Spontak, Richard J. Macromolecular Rapid Communications https://doi.org/10.1002/marc.201800669	journal	December 2018

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