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

doi:10.1021/acs.macromol.7b02755

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:

Fu, Wenxin ^[1]; Bai, Wei ^[1]; Jiang, Sisi ^[1]; Seymour, Bryan T. ^[1];

^[1]

Univ. of Tennessee, Knoxville, TN (United States). Department of Chemistry

Publication Date:: 2018-02-20

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.

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                    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.

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                    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.

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@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}

}

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Journal Article:

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Accepted Manuscript (DOE)

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DOI: 10.1021/acs.macromol.7b02755

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Figures / Tables:

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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