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Title: UCST-Type Thermoresponsive Polymers in Synthetic Lubricating Oil Polyalphaolefin (PAO)

Abstract

Here, this article reports a family of UCST-type thermoresponsive polymers, poly(alkyl methacrylate)s with an appropriate alkyl pendant length, in an industrially important non-volatile organic liquid polyalphaolefin (PAO). The cloud point (CP) can be readily tuned over a wide temperature range by changing the alkyl pendant length; at a concentration of 1 wt% and similar polymer molecular weights, the CP varies linearly with the (average) number of carbon atoms in the alkyl pendant. PAO solutions of ABA triblock copolymers, composed of a PAO-philic middle block and thermoresponsive outer blocks with appropriate block lengths, undergo thermoreversible sol-gel transitions at sufficiently high concentrations. The discovery of thermoresponsive polymers in PAO makes it possible to explore new applications by utilizing PAO’s unique characteristics such as thermal stability, non-volatility, superior lubrication properties, etc. Lastly, two examples are presented: thermoresponsive physical gels for control of optical transmittance and injectable gel lubricants.

Authors:
 [1];  [1];  [1];  [1]; ORCiD logo [1]
  1. Univ. of Tennessee, Knoxville, TN (United States). Department of Chemistry
Publication Date:
Research Org.:
Univ. of Tennessee, Knoxville, TN (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1430641
Grant/Contract Number:  
EE0006925
Resource Type:
Accepted Manuscript
Journal Name:
Macromolecules
Additional Journal Information:
Journal Volume: 51; Journal Issue: 5; Journal ID: ISSN 0024-9297
Publisher:
American Chemical Society
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE; PAO; gel lubricant

Citation Formats

Fu, Wenxin, Bai, Wei, Jiang, Sisi, Seymour, Bryan T., and Zhao, Bin. UCST-Type Thermoresponsive Polymers in Synthetic Lubricating Oil Polyalphaolefin (PAO). United States: N. p., 2018. Web. doi:10.1021/acs.macromol.7b02755.
Fu, Wenxin, Bai, Wei, Jiang, Sisi, Seymour, Bryan T., & Zhao, Bin. UCST-Type Thermoresponsive Polymers in Synthetic Lubricating Oil Polyalphaolefin (PAO). United States. doi:10.1021/acs.macromol.7b02755.
Fu, Wenxin, Bai, Wei, Jiang, Sisi, Seymour, Bryan T., and Zhao, Bin. Tue . "UCST-Type Thermoresponsive Polymers in Synthetic Lubricating Oil Polyalphaolefin (PAO)". United States. doi:10.1021/acs.macromol.7b02755. https://www.osti.gov/servlets/purl/1430641.
@article{osti_1430641,
title = {UCST-Type Thermoresponsive Polymers in Synthetic Lubricating Oil Polyalphaolefin (PAO)},
author = {Fu, Wenxin and Bai, Wei and Jiang, Sisi and Seymour, Bryan T. and Zhao, Bin},
abstractNote = {Here, this article reports a family of UCST-type thermoresponsive polymers, poly(alkyl methacrylate)s with an appropriate alkyl pendant length, in an industrially important non-volatile organic liquid polyalphaolefin (PAO). The cloud point (CP) can be readily tuned over a wide temperature range by changing the alkyl pendant length; at a concentration of 1 wt% and similar polymer molecular weights, the CP varies linearly with the (average) number of carbon atoms in the alkyl pendant. PAO solutions of ABA triblock copolymers, composed of a PAO-philic middle block and thermoresponsive outer blocks with appropriate block lengths, undergo thermoreversible sol-gel transitions at sufficiently high concentrations. The discovery of thermoresponsive polymers in PAO makes it possible to explore new applications by utilizing PAO’s unique characteristics such as thermal stability, non-volatility, superior lubrication properties, etc. Lastly, two examples are presented: thermoresponsive physical gels for control of optical transmittance and injectable gel lubricants.},
doi = {10.1021/acs.macromol.7b02755},
journal = {Macromolecules},
number = 5,
volume = 51,
place = {United States},
year = {2018},
month = {2}
}

Journal Article:
Free Publicly Available Full Text
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Cited by: 1 work
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Figures / Tables:

Scheme 1 Scheme 1: (A) Molecular Structures of Homopolymers of Alkyl Methacrylates with Linear and Branched Alkyl Pendants as well as Random Copolymers. (B) Synthesis of ABA Triblock Copolymers Composed of a PAO-philic Middle Block and Two UCST-type Thermoresponsive Outer Blocks by Two-Step RAFT Polymerizations.

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Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.