Microstructure and performance of block copolymer modified epoxy coatings

Tuoqi Li; Michael J. Heinzer; Erica M. Redline; Feng Zuo; Frank S. Bates; Lorraine F. Francis

doi:10.1016/j.porgcoat.2014.03.015

Microstructure and performance of block copolymer modified epoxy coatings

Tuoqi Li, Michael J. Heinzer, Erica M. Redline, Feng Zuo, Frank S. Bates, Lorraine F. Francis

Chemical Engineering and Materials Science

Research output: Contribution to journal › Article › peer-review

31 Scopus citations

Abstract

The effects of two diblock copolymers, poly(ethylene-alt-propylene)-b- poly(ethylene oxide) (PEP-PEO) and poly(1,2-butadiene)-b-poly(2-vinyl pyridine) (PB-P2VP) on the mechanical properties of epoxy coatings were studied. Both modifiers self-assembled into spherical micelles of 10-20 nm diameter in cured bulk epoxy. This morphology was preserved in 15 μm thick coatings; however, micelle segregation to the coating/substrate interface was also observed. The critical strain energy release rate, G_1c, of bulk thermosets was enhanced by up to fivefold with the addition of block copolymers. Likewise, the abrasive wear resistance of thin coatings increased with modifier inclusion. The results showed that at 5 wt.% of loading, block copolymers were able to impart a 40% increase in abrasive wear resistance to modified coatings over neat ones. Block copolymer modifiers did not sacrifice the modulus and glass transition temperature of bulk thermosets and coatings, or the hardness and transparency of coatings.

Original language	English (US)
Pages (from-to)	1145-1154
Number of pages	10
Journal	Progress in Organic Coatings
Volume	77
Issue number	7
DOIs	https://doi.org/10.1016/j.porgcoat.2014.03.015
State	Published - Jul 2014

Bibliographical note

Funding Information:
This work was supported primarily by the Dow Chemical Company. Parts of this work were also supported by the MRSEC Program of the National Science Foundation under Award Number DMR-0212302 and DMR-0819885 . Parts of this work were carried out in the Characterization Facility, University of Minnesota, a member of the NSF-funded Materials Research Facilities Network ( www.mrfn.org ) via the MRSEC program. The authors thank Fang Zhou for the assistance with TEM specimen preparation.

Keywords

Abrasive wear resistance
Block copolymer
Epoxy coating
Fracture toughness

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10.1016/j.porgcoat.2014.03.015

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title = "Microstructure and performance of block copolymer modified epoxy coatings",

abstract = "The effects of two diblock copolymers, poly(ethylene-alt-propylene)-b- poly(ethylene oxide) (PEP-PEO) and poly(1,2-butadiene)-b-poly(2-vinyl pyridine) (PB-P2VP) on the mechanical properties of epoxy coatings were studied. Both modifiers self-assembled into spherical micelles of 10-20 nm diameter in cured bulk epoxy. This morphology was preserved in 15 μm thick coatings; however, micelle segregation to the coating/substrate interface was also observed. The critical strain energy release rate, G1c, of bulk thermosets was enhanced by up to fivefold with the addition of block copolymers. Likewise, the abrasive wear resistance of thin coatings increased with modifier inclusion. The results showed that at 5 wt.% of loading, block copolymers were able to impart a 40% increase in abrasive wear resistance to modified coatings over neat ones. Block copolymer modifiers did not sacrifice the modulus and glass transition temperature of bulk thermosets and coatings, or the hardness and transparency of coatings.",

keywords = "Abrasive wear resistance, Block copolymer, Epoxy coating, Fracture toughness",

author = "Tuoqi Li and Heinzer, {Michael J.} and Redline, {Erica M.} and Feng Zuo and Bates, {Frank S.} and Francis, {Lorraine F.}",

note = "Funding Information: This work was supported primarily by the Dow Chemical Company. Parts of this work were also supported by the MRSEC Program of the National Science Foundation under Award Number DMR-0212302 and DMR-0819885 . Parts of this work were carried out in the Characterization Facility, University of Minnesota, a member of the NSF-funded Materials Research Facilities Network ( www.mrfn.org ) via the MRSEC program. The authors thank Fang Zhou for the assistance with TEM specimen preparation.",

year = "2014",

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doi = "10.1016/j.porgcoat.2014.03.015",

language = "English (US)",

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pages = "1145--1154",

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AU - Li, Tuoqi

AU - Heinzer, Michael J.

AU - Redline, Erica M.

AU - Zuo, Feng

AU - Bates, Frank S.

AU - Francis, Lorraine F.

N1 - Funding Information: This work was supported primarily by the Dow Chemical Company. Parts of this work were also supported by the MRSEC Program of the National Science Foundation under Award Number DMR-0212302 and DMR-0819885 . Parts of this work were carried out in the Characterization Facility, University of Minnesota, a member of the NSF-funded Materials Research Facilities Network ( www.mrfn.org ) via the MRSEC program. The authors thank Fang Zhou for the assistance with TEM specimen preparation.

PY - 2014/7

Y1 - 2014/7

N2 - The effects of two diblock copolymers, poly(ethylene-alt-propylene)-b- poly(ethylene oxide) (PEP-PEO) and poly(1,2-butadiene)-b-poly(2-vinyl pyridine) (PB-P2VP) on the mechanical properties of epoxy coatings were studied. Both modifiers self-assembled into spherical micelles of 10-20 nm diameter in cured bulk epoxy. This morphology was preserved in 15 μm thick coatings; however, micelle segregation to the coating/substrate interface was also observed. The critical strain energy release rate, G1c, of bulk thermosets was enhanced by up to fivefold with the addition of block copolymers. Likewise, the abrasive wear resistance of thin coatings increased with modifier inclusion. The results showed that at 5 wt.% of loading, block copolymers were able to impart a 40% increase in abrasive wear resistance to modified coatings over neat ones. Block copolymer modifiers did not sacrifice the modulus and glass transition temperature of bulk thermosets and coatings, or the hardness and transparency of coatings.

AB - The effects of two diblock copolymers, poly(ethylene-alt-propylene)-b- poly(ethylene oxide) (PEP-PEO) and poly(1,2-butadiene)-b-poly(2-vinyl pyridine) (PB-P2VP) on the mechanical properties of epoxy coatings were studied. Both modifiers self-assembled into spherical micelles of 10-20 nm diameter in cured bulk epoxy. This morphology was preserved in 15 μm thick coatings; however, micelle segregation to the coating/substrate interface was also observed. The critical strain energy release rate, G1c, of bulk thermosets was enhanced by up to fivefold with the addition of block copolymers. Likewise, the abrasive wear resistance of thin coatings increased with modifier inclusion. The results showed that at 5 wt.% of loading, block copolymers were able to impart a 40% increase in abrasive wear resistance to modified coatings over neat ones. Block copolymer modifiers did not sacrifice the modulus and glass transition temperature of bulk thermosets and coatings, or the hardness and transparency of coatings.

KW - Abrasive wear resistance

KW - Block copolymer

KW - Epoxy coating

KW - Fracture toughness

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ER -

Microstructure and performance of block copolymer modified epoxy coatings

Abstract

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Keywords

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