Linear Viscoelasticity of Spherical SiO 2 Nanoparticle-Tethered Poly(butyl acrylate) Hybrids

Vivek Goel; Joanna Pietrasik; Krzysztof Matyjaszewski; Ramanan Krishnamoorti

doi:10.1021/ie1007129

Linear Viscoelasticity of Spherical SiO 2 Nanoparticle-Tethered Poly(butyl acrylate) Hybrids

Vivek Goel, Joanna Pietrasik, Krzysztof Matyjaszewski, Ramanan Krishnamoorti

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

18 Scopus citations

Abstract

The melt state linear viscoelastic properties of spherical silica nanoparticles with grafted poly(n-butyl acrylate) chains of varying molecular weight were probed using linear small amplitude dynamic oscillatory measurements and complementary linear stress relaxation measurements. While the pure silica-tethered-polymer hybrids with no added homopolymer exhibit solid-like response, addition of matched molecular weight free matrix homopolymer chains to this hybrid, at low concentrations of added homopolymer, maintains the solid-like response with a lowered modulus that can be factored into a silica concentration dependence and a molecular weight dependence. While the silica concentration dependence of the modulus is strong, the dependence on molecular weight is weak. On the other hand, increasing the amount of added homopolymer changes the viscoelastic response to that of a liquid with a relaxation time that scales exponentially with hybrid concentration. © 2010 American Chemical Society.

Original language	English (US)
Pages (from-to)	11985-11990
Number of pages	6
Journal	Industrial & Engineering Chemistry Research
Volume	49
Issue number	23
DOIs	https://doi.org/10.1021/ie1007129
State	Published - Dec 2010
Externally published	Yes

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledged KAUST grant number(s): KUS-C1-018-02
Acknowledgements: V.G. and R.K. gratefully acknowledge the partial support of the National Science Foundation (CMMI-0708096). This publication is based on work supported in part by Award No. KUS-C1-018-02, made by King Abdullah University of Science and Technology (KAUST). J.P. and K.M. thank the Kosciuszko Foundation, Ministry of Science and Higher Education (Grant No. N508 3820 33) and the National Science Foundation (DMR-09-69301) for financial support.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.

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title = "Linear Viscoelasticity of Spherical SiO 2 Nanoparticle-Tethered Poly(butyl acrylate) Hybrids",

abstract = "The melt state linear viscoelastic properties of spherical silica nanoparticles with grafted poly(n-butyl acrylate) chains of varying molecular weight were probed using linear small amplitude dynamic oscillatory measurements and complementary linear stress relaxation measurements. While the pure silica-tethered-polymer hybrids with no added homopolymer exhibit solid-like response, addition of matched molecular weight free matrix homopolymer chains to this hybrid, at low concentrations of added homopolymer, maintains the solid-like response with a lowered modulus that can be factored into a silica concentration dependence and a molecular weight dependence. While the silica concentration dependence of the modulus is strong, the dependence on molecular weight is weak. On the other hand, increasing the amount of added homopolymer changes the viscoelastic response to that of a liquid with a relaxation time that scales exponentially with hybrid concentration. {\textcopyright} 2010 American Chemical Society.",

author = "Vivek Goel and Joanna Pietrasik and Krzysztof Matyjaszewski and Ramanan Krishnamoorti",

note = "KAUST Repository Item: Exported on 2020-10-01 Acknowledged KAUST grant number(s): KUS-C1-018-02 Acknowledgements: V.G. and R.K. gratefully acknowledge the partial support of the National Science Foundation (CMMI-0708096). This publication is based on work supported in part by Award No. KUS-C1-018-02, made by King Abdullah University of Science and Technology (KAUST). J.P. and K.M. thank the Kosciuszko Foundation, Ministry of Science and Higher Education (Grant No. N508 3820 33) and the National Science Foundation (DMR-09-69301) for financial support. This publication acknowledges KAUST support, but has no KAUST affiliated authors.",

year = "2010",

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doi = "10.1021/ie1007129",

language = "English (US)",

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AU - Goel, Vivek

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AU - Matyjaszewski, Krzysztof

AU - Krishnamoorti, Ramanan

N1 - KAUST Repository Item: Exported on 2020-10-01 Acknowledged KAUST grant number(s): KUS-C1-018-02 Acknowledgements: V.G. and R.K. gratefully acknowledge the partial support of the National Science Foundation (CMMI-0708096). This publication is based on work supported in part by Award No. KUS-C1-018-02, made by King Abdullah University of Science and Technology (KAUST). J.P. and K.M. thank the Kosciuszko Foundation, Ministry of Science and Higher Education (Grant No. N508 3820 33) and the National Science Foundation (DMR-09-69301) for financial support. This publication acknowledges KAUST support, but has no KAUST affiliated authors.

PY - 2010/12

Y1 - 2010/12

N2 - The melt state linear viscoelastic properties of spherical silica nanoparticles with grafted poly(n-butyl acrylate) chains of varying molecular weight were probed using linear small amplitude dynamic oscillatory measurements and complementary linear stress relaxation measurements. While the pure silica-tethered-polymer hybrids with no added homopolymer exhibit solid-like response, addition of matched molecular weight free matrix homopolymer chains to this hybrid, at low concentrations of added homopolymer, maintains the solid-like response with a lowered modulus that can be factored into a silica concentration dependence and a molecular weight dependence. While the silica concentration dependence of the modulus is strong, the dependence on molecular weight is weak. On the other hand, increasing the amount of added homopolymer changes the viscoelastic response to that of a liquid with a relaxation time that scales exponentially with hybrid concentration. © 2010 American Chemical Society.

AB - The melt state linear viscoelastic properties of spherical silica nanoparticles with grafted poly(n-butyl acrylate) chains of varying molecular weight were probed using linear small amplitude dynamic oscillatory measurements and complementary linear stress relaxation measurements. While the pure silica-tethered-polymer hybrids with no added homopolymer exhibit solid-like response, addition of matched molecular weight free matrix homopolymer chains to this hybrid, at low concentrations of added homopolymer, maintains the solid-like response with a lowered modulus that can be factored into a silica concentration dependence and a molecular weight dependence. While the silica concentration dependence of the modulus is strong, the dependence on molecular weight is weak. On the other hand, increasing the amount of added homopolymer changes the viscoelastic response to that of a liquid with a relaxation time that scales exponentially with hybrid concentration. © 2010 American Chemical Society.

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Linear Viscoelasticity of Spherical SiO 2 Nanoparticle-Tethered Poly(butyl acrylate) Hybrids

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