Glass transition of poly (methyl methacrylate) filled with nanosilica and core-shell structured silica

Yihu Song, Jing Bu, Min Zuo, Yang Gao, Wenjing (Angela) Zhang, Qiang Zheng

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Core-shell (CS) nanocomposite particles with 53.4 wt% cross-linked poly (methyl methacrylate) (PMMA) shell of 11.6 nm in thickness were fabricated via miniemulsion polymerization of methyl methacrylate in the presence of modified nanosilica. The influence of nanosilica and CS nanoparticles on glass transition and segmental dynamics of PMMA in the nanocomposites prepared via solution casting was compared. The remarkable depression (≥10 °C) of glass transition temperature (Tg) induced by the incorporation of SiO2 and CS was both observed at low loadings. Here, different mechanisms were responsible for the effect of SiO2 and CS on the segmental acceleration of PMMA matrix. The formation of rigid amorphous fraction (RAF) layer around SiO2 with the thickness of 16.4 nm led to the adjacent molecular packing frustration, while the “lubrication” effect of nonwetting interface between the grafted crosslinked chains and matrix chains resulted in the segmental acceleration and the reduction of dynamic fragility.
Original languageEnglish
JournalPolymer
Volume127
Pages (from-to)141-149
ISSN0032-3861
DOIs
Publication statusPublished - 2017

Keywords

  • Core-shell nanocomposite
  • Poly (methyl methacrylate)
  • Nanosilica
  • Glass transition
  • Segmental dynamics

Cite this

Song, Yihu ; Bu, Jing ; Zuo, Min ; Gao, Yang ; Zhang, Wenjing (Angela) ; Zheng, Qiang. / Glass transition of poly (methyl methacrylate) filled with nanosilica and core-shell structured silica. In: Polymer. 2017 ; Vol. 127. pp. 141-149.
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title = "Glass transition of poly (methyl methacrylate) filled with nanosilica and core-shell structured silica",
abstract = "Core-shell (CS) nanocomposite particles with 53.4 wt{\%} cross-linked poly (methyl methacrylate) (PMMA) shell of 11.6 nm in thickness were fabricated via miniemulsion polymerization of methyl methacrylate in the presence of modified nanosilica. The influence of nanosilica and CS nanoparticles on glass transition and segmental dynamics of PMMA in the nanocomposites prepared via solution casting was compared. The remarkable depression (≥10 °C) of glass transition temperature (Tg) induced by the incorporation of SiO2 and CS was both observed at low loadings. Here, different mechanisms were responsible for the effect of SiO2 and CS on the segmental acceleration of PMMA matrix. The formation of rigid amorphous fraction (RAF) layer around SiO2 with the thickness of 16.4 nm led to the adjacent molecular packing frustration, while the “lubrication” effect of nonwetting interface between the grafted crosslinked chains and matrix chains resulted in the segmental acceleration and the reduction of dynamic fragility.",
keywords = "Core-shell nanocomposite, Poly (methyl methacrylate), Nanosilica, Glass transition, Segmental dynamics",
author = "Yihu Song and Jing Bu and Min Zuo and Yang Gao and Zhang, {Wenjing (Angela)} and Qiang Zheng",
year = "2017",
doi = "10.1016/j.polymer.2017.08.038",
language = "English",
volume = "127",
pages = "141--149",
journal = "Polymer",
issn = "0032-3861",
publisher = "Elsevier",

}

Glass transition of poly (methyl methacrylate) filled with nanosilica and core-shell structured silica. / Song, Yihu; Bu, Jing ; Zuo, Min; Gao, Yang ; Zhang, Wenjing (Angela); Zheng, Qiang.

In: Polymer, Vol. 127, 2017, p. 141-149.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Glass transition of poly (methyl methacrylate) filled with nanosilica and core-shell structured silica

AU - Song, Yihu

AU - Bu, Jing

AU - Zuo, Min

AU - Gao, Yang

AU - Zhang, Wenjing (Angela)

AU - Zheng, Qiang

PY - 2017

Y1 - 2017

N2 - Core-shell (CS) nanocomposite particles with 53.4 wt% cross-linked poly (methyl methacrylate) (PMMA) shell of 11.6 nm in thickness were fabricated via miniemulsion polymerization of methyl methacrylate in the presence of modified nanosilica. The influence of nanosilica and CS nanoparticles on glass transition and segmental dynamics of PMMA in the nanocomposites prepared via solution casting was compared. The remarkable depression (≥10 °C) of glass transition temperature (Tg) induced by the incorporation of SiO2 and CS was both observed at low loadings. Here, different mechanisms were responsible for the effect of SiO2 and CS on the segmental acceleration of PMMA matrix. The formation of rigid amorphous fraction (RAF) layer around SiO2 with the thickness of 16.4 nm led to the adjacent molecular packing frustration, while the “lubrication” effect of nonwetting interface between the grafted crosslinked chains and matrix chains resulted in the segmental acceleration and the reduction of dynamic fragility.

AB - Core-shell (CS) nanocomposite particles with 53.4 wt% cross-linked poly (methyl methacrylate) (PMMA) shell of 11.6 nm in thickness were fabricated via miniemulsion polymerization of methyl methacrylate in the presence of modified nanosilica. The influence of nanosilica and CS nanoparticles on glass transition and segmental dynamics of PMMA in the nanocomposites prepared via solution casting was compared. The remarkable depression (≥10 °C) of glass transition temperature (Tg) induced by the incorporation of SiO2 and CS was both observed at low loadings. Here, different mechanisms were responsible for the effect of SiO2 and CS on the segmental acceleration of PMMA matrix. The formation of rigid amorphous fraction (RAF) layer around SiO2 with the thickness of 16.4 nm led to the adjacent molecular packing frustration, while the “lubrication” effect of nonwetting interface between the grafted crosslinked chains and matrix chains resulted in the segmental acceleration and the reduction of dynamic fragility.

KW - Core-shell nanocomposite

KW - Poly (methyl methacrylate)

KW - Nanosilica

KW - Glass transition

KW - Segmental dynamics

U2 - 10.1016/j.polymer.2017.08.038

DO - 10.1016/j.polymer.2017.08.038

M3 - Journal article

VL - 127

SP - 141

EP - 149

JO - Polymer

JF - Polymer

SN - 0032-3861

ER -