Adhesion of Silica and Block Copolymer Toughened Epoxy Composites

Vincent Pang; Zachary J. Thompson; Guy D. Joly; Frank S. Bates; Lorraine F Francis

doi:10.1021/acsapm.2c00948

Adhesion of Silica and Block Copolymer Toughened Epoxy Composites

Vincent Pang, Zachary J. Thompson, Guy D. Joly, Frank S. Bates, Lorraine F Francis

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

3 Scopus citations

Abstract

The effect of the size and surface functionalization of silica particle additives on the bulk and adhesive mechanical properties of neat and poly(ethylene oxide)-b-poly(ethylene-alt-propylene) block copolymer (BCP)-modified epoxies was evaluated. Three types of silica particles were investigated: microscale (diameter = 500 nm-4 μm) particles with and without phenylsilane functionalization and nanoscale particles (diameter = 140 nm) with phenylsilane functionalization. Silica particles were dispersed individually or together with block copolymers in the epoxy monomers and cured. Tensile tests revealed that the incorporation of silica increased the modulus of the composites, regardless of surface functionalization and particle size. The fracture toughness, measured by compact tension, also increased substantially when BCP was added but only modestly when each of the various silica additives was dispersed in the epoxy. Together, silica and block copolymer additives enhanced the fracture toughness, without significant effects from silica size or surface functionalization. Single-lap-joint shear tests with aluminum showed anapproximately 50% increase in adhesion strength when block copolymer micelles were dispersed in the cured epoxy, but little impact was realized from any of the silica particles studied. Failure mechanisms and the observed trends are discussed.

Original language	English (US)
Pages (from-to)	6169-6178
Number of pages	10
Journal	ACS Applied Polymer Materials
Volume	4
Issue number	8
DOIs	https://doi.org/10.1021/acsapm.2c00948
State	Published - Aug 12 2022

Bibliographical note

Funding Information:
This work was funded and supported by the 3M Company. V.P. acknowledges support from the 3M Science and Technology Fellowship. Parts of this work were carried out in the Characterization Facility, University of Minnesota, which receives partial support from the NSF through the MRSEC program.

Publisher Copyright:
© 2022 American Chemical Society.

Keywords

adhesion
block copolymer
dispersion
epoxy
lap-joint shear
silica
toughness

MRSEC Support

Shared

Publisher link

10.1021/acsapm.2c00948

Find It

Find It at U of M Libraries

Cite this

@article{7ca56852fd934d8b9c1ac77413a37910,

title = "Adhesion of Silica and Block Copolymer Toughened Epoxy Composites",

abstract = "The effect of the size and surface functionalization of silica particle additives on the bulk and adhesive mechanical properties of neat and poly(ethylene oxide)-b-poly(ethylene-alt-propylene) block copolymer (BCP)-modified epoxies was evaluated. Three types of silica particles were investigated: microscale (diameter = 500 nm-4 μm) particles with and without phenylsilane functionalization and nanoscale particles (diameter = 140 nm) with phenylsilane functionalization. Silica particles were dispersed individually or together with block copolymers in the epoxy monomers and cured. Tensile tests revealed that the incorporation of silica increased the modulus of the composites, regardless of surface functionalization and particle size. The fracture toughness, measured by compact tension, also increased substantially when BCP was added but only modestly when each of the various silica additives was dispersed in the epoxy. Together, silica and block copolymer additives enhanced the fracture toughness, without significant effects from silica size or surface functionalization. Single-lap-joint shear tests with aluminum showed anapproximately 50% increase in adhesion strength when block copolymer micelles were dispersed in the cured epoxy, but little impact was realized from any of the silica particles studied. Failure mechanisms and the observed trends are discussed.",

keywords = "adhesion, block copolymer, dispersion, epoxy, lap-joint shear, silica, toughness",

author = "Vincent Pang and Thompson, {Zachary J.} and Joly, {Guy D.} and Bates, {Frank S.} and Francis, {Lorraine F}",

note = "Funding Information: This work was funded and supported by the 3M Company. V.P. acknowledges support from the 3M Science and Technology Fellowship. Parts of this work were carried out in the Characterization Facility, University of Minnesota, which receives partial support from the NSF through the MRSEC program. Publisher Copyright: {\textcopyright} 2022 American Chemical Society.",

year = "2022",

month = aug,

day = "12",

doi = "10.1021/acsapm.2c00948",

language = "English (US)",

volume = "4",

pages = "6169--6178",

journal = "ACS Applied Polymer Materials",

issn = "2637-6105",

publisher = "American Chemical Society",

number = "8",

}

TY - JOUR

T1 - Adhesion of Silica and Block Copolymer Toughened Epoxy Composites

AU - Pang, Vincent

AU - Thompson, Zachary J.

AU - Joly, Guy D.

AU - Bates, Frank S.

AU - Francis, Lorraine F

N1 - Funding Information: This work was funded and supported by the 3M Company. V.P. acknowledges support from the 3M Science and Technology Fellowship. Parts of this work were carried out in the Characterization Facility, University of Minnesota, which receives partial support from the NSF through the MRSEC program. Publisher Copyright: © 2022 American Chemical Society.

PY - 2022/8/12

Y1 - 2022/8/12

N2 - The effect of the size and surface functionalization of silica particle additives on the bulk and adhesive mechanical properties of neat and poly(ethylene oxide)-b-poly(ethylene-alt-propylene) block copolymer (BCP)-modified epoxies was evaluated. Three types of silica particles were investigated: microscale (diameter = 500 nm-4 μm) particles with and without phenylsilane functionalization and nanoscale particles (diameter = 140 nm) with phenylsilane functionalization. Silica particles were dispersed individually or together with block copolymers in the epoxy monomers and cured. Tensile tests revealed that the incorporation of silica increased the modulus of the composites, regardless of surface functionalization and particle size. The fracture toughness, measured by compact tension, also increased substantially when BCP was added but only modestly when each of the various silica additives was dispersed in the epoxy. Together, silica and block copolymer additives enhanced the fracture toughness, without significant effects from silica size or surface functionalization. Single-lap-joint shear tests with aluminum showed anapproximately 50% increase in adhesion strength when block copolymer micelles were dispersed in the cured epoxy, but little impact was realized from any of the silica particles studied. Failure mechanisms and the observed trends are discussed.

AB - The effect of the size and surface functionalization of silica particle additives on the bulk and adhesive mechanical properties of neat and poly(ethylene oxide)-b-poly(ethylene-alt-propylene) block copolymer (BCP)-modified epoxies was evaluated. Three types of silica particles were investigated: microscale (diameter = 500 nm-4 μm) particles with and without phenylsilane functionalization and nanoscale particles (diameter = 140 nm) with phenylsilane functionalization. Silica particles were dispersed individually or together with block copolymers in the epoxy monomers and cured. Tensile tests revealed that the incorporation of silica increased the modulus of the composites, regardless of surface functionalization and particle size. The fracture toughness, measured by compact tension, also increased substantially when BCP was added but only modestly when each of the various silica additives was dispersed in the epoxy. Together, silica and block copolymer additives enhanced the fracture toughness, without significant effects from silica size or surface functionalization. Single-lap-joint shear tests with aluminum showed anapproximately 50% increase in adhesion strength when block copolymer micelles were dispersed in the cured epoxy, but little impact was realized from any of the silica particles studied. Failure mechanisms and the observed trends are discussed.

KW - adhesion

KW - block copolymer

KW - dispersion

KW - epoxy

KW - lap-joint shear

KW - silica

KW - toughness

UR - http://www.scopus.com/inward/record.url?scp=85136070943&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85136070943&partnerID=8YFLogxK

U2 - 10.1021/acsapm.2c00948

DO - 10.1021/acsapm.2c00948

M3 - Article

AN - SCOPUS:85136070943

SN - 2637-6105

VL - 4

SP - 6169

EP - 6178

JO - ACS Applied Polymer Materials

JF - ACS Applied Polymer Materials

IS - 8

ER -

Adhesion of Silica and Block Copolymer Toughened Epoxy Composites

Abstract

Bibliographical note

Keywords

MRSEC Support

Publisher link

Find It

Other files and links

Fingerprint

IRG-2: Mesoscale Network Materials

MRSEC Program (Period of DMR-2011401)

Cite this

Adhesion of Silica and Block Copolymer Toughened Epoxy Composites

Abstract

Bibliographical note

Keywords

MRSEC Support

Publisher link

Find It

Other files and links

Fingerprint

Projects

IRG-2: Mesoscale Network Materials

MRSEC Program (Period of DMR-2011401)

Cite this