Viscoelastic behavior of poly(methyl methacrylate-co-methyl acrylate) random copolymer studied by dynamic mechanical analysis and nanoindentation

Keran Li; Bijin Xiong; Jichao Qiao; Ya Cao

doi:10.1080/00222348.2015.1087454

Viscoelastic behavior of poly(methyl methacrylate-co-methyl acrylate) random copolymer studied by dynamic mechanical analysis and nanoindentation

Keran Li, Bijin Xiong, Jichao Qiao, Ya Cao

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

1 Scopus citations

Abstract

The viscoelastic behavior of poly(methyl methacrylate) (PMMA) homopolymer and poly(methyl methacrylate-co-methyl acrylate) random copolymers was characterized by dynamic mechanical analysis and nanoindentation. Differential scanning calorimetric results showed only one glass transition, indicating the random distribution of comonomers in the copolymers. The a relaxation temperature (T_α) and activation energy (H_α) decreased with increasing content of methyl acrylate monomers (C_MA%). The β relaxation temperature (T_β) also decreased whereas the activation energy (H_β) showed only small variations compared with H_α. Moreover, the indention displacement and creep compliance strongly depended on C_MA%. Two creep stages were found in the creep compliance curves.

Original language	English
Pages (from-to)	1297-1308
Number of pages	12
Journal	Journal of Macromolecular Science, Part B: Physics
Volume	54
Issue number	11
DOIs	https://doi.org/10.1080/00222348.2015.1087454
State	Published - 2015
Externally published	Yes

Keywords

Dynamic mechanical analysis
Nanoindentation
Poly(methyl methacrylatecomethyl acrylate)
Random copolymer
Viscoelasticity

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10.1080/00222348.2015.1087454

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title = "Viscoelastic behavior of poly(methyl methacrylate-co-methyl acrylate) random copolymer studied by dynamic mechanical analysis and nanoindentation",

abstract = "The viscoelastic behavior of poly(methyl methacrylate) (PMMA) homopolymer and poly(methyl methacrylate-co-methyl acrylate) random copolymers was characterized by dynamic mechanical analysis and nanoindentation. Differential scanning calorimetric results showed only one glass transition, indicating the random distribution of comonomers in the copolymers. The a relaxation temperature (Tα) and activation energy (Hα) decreased with increasing content of methyl acrylate monomers (CMA%). The β relaxation temperature (Tβ) also decreased whereas the activation energy (Hβ) showed only small variations compared with Hα. Moreover, the indention displacement and creep compliance strongly depended on CMA%. Two creep stages were found in the creep compliance curves.",

keywords = "Dynamic mechanical analysis, Nanoindentation, Poly(methyl methacrylatecomethyl acrylate), Random copolymer, Viscoelasticity",

author = "Keran Li and Bijin Xiong and Jichao Qiao and Ya Cao",

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T1 - Viscoelastic behavior of poly(methyl methacrylate-co-methyl acrylate) random copolymer studied by dynamic mechanical analysis and nanoindentation

AU - Li, Keran

AU - Xiong, Bijin

AU - Qiao, Jichao

AU - Cao, Ya

PY - 2015

Y1 - 2015

N2 - The viscoelastic behavior of poly(methyl methacrylate) (PMMA) homopolymer and poly(methyl methacrylate-co-methyl acrylate) random copolymers was characterized by dynamic mechanical analysis and nanoindentation. Differential scanning calorimetric results showed only one glass transition, indicating the random distribution of comonomers in the copolymers. The a relaxation temperature (Tα) and activation energy (Hα) decreased with increasing content of methyl acrylate monomers (CMA%). The β relaxation temperature (Tβ) also decreased whereas the activation energy (Hβ) showed only small variations compared with Hα. Moreover, the indention displacement and creep compliance strongly depended on CMA%. Two creep stages were found in the creep compliance curves.

AB - The viscoelastic behavior of poly(methyl methacrylate) (PMMA) homopolymer and poly(methyl methacrylate-co-methyl acrylate) random copolymers was characterized by dynamic mechanical analysis and nanoindentation. Differential scanning calorimetric results showed only one glass transition, indicating the random distribution of comonomers in the copolymers. The a relaxation temperature (Tα) and activation energy (Hα) decreased with increasing content of methyl acrylate monomers (CMA%). The β relaxation temperature (Tβ) also decreased whereas the activation energy (Hβ) showed only small variations compared with Hα. Moreover, the indention displacement and creep compliance strongly depended on CMA%. Two creep stages were found in the creep compliance curves.

KW - Dynamic mechanical analysis

KW - Nanoindentation

KW - Poly(methyl methacrylatecomethyl acrylate)

KW - Random copolymer

KW - Viscoelasticity

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DO - 10.1080/00222348.2015.1087454

M3 - 文章

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SN - 0022-2348

VL - 54

SP - 1297

EP - 1308

JO - Journal of Macromolecular Science, Part B: Physics

JF - Journal of Macromolecular Science, Part B: Physics

IS - 11

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Viscoelastic behavior of poly(methyl methacrylate-co-methyl acrylate) random copolymer studied by dynamic mechanical analysis and nanoindentation

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Keywords

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