High dielectric constant composite of P(VDF-TrFE) with grafted copper phthalocyanine oligomer

Jing Wen Wang; Qun Dong Shen; Chang Zheng Yang; Qi Ming Zhang

doi:10.1021/ma035685c

High dielectric constant composite of P(VDF-TrFE) with grafted copper phthalocyanine oligomer

Jing Wen Wang, Qun Dong Shen, Chang Zheng Yang, Qi Ming Zhang

Electrical Engineering

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

106 Scopus citations

Abstract

Chemically modified copper phthalocyanine (CuPc) oligomer with active vinyl groups was successfully bonded to poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)) backbone via free radical graft reaction in solution. Improvement of the dispersibility of CuPc oligomer in polymer matrix was confirmed by TEM-observed morphologies. The size of CuPc particulates in the polymer matrix is in the range of 60-120 nm. This nanocomposite (with 25 wt % CuPc) is very flexible with an elastic modulus of 912 MPa, which is nearly the same as that of the polymer matrix, and presents a breakdown field of 37.7 V/μm, while for the blend of P(VDF-TrFE) and CuPc oligomer, it is 29.7 V/μm. The dielectric constant reaches about 100 at 100 Hz and room temperature, representing a more than 6 times increase compared with the matrix. The grafted nanocomposite exhibits a weaker dielectric dispersion in comparison with the blend of P(VDF-TrFE) and CuPc oligomer, particularly at low-frequency range. The low-frequency dielectric dispersion can be attributed to the Maxwell-Wagner-Sillars polarization mechanism.

Original language	English (US)
Pages (from-to)	2294-2298
Number of pages	5
Journal	Macromolecules
Volume	37
Issue number	6
DOIs	https://doi.org/10.1021/ma035685c
State	Published - Mar 23 2004

All Science Journal Classification (ASJC) codes

Organic Chemistry
Polymers and Plastics
Inorganic Chemistry
Materials Chemistry

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title = "High dielectric constant composite of P(VDF-TrFE) with grafted copper phthalocyanine oligomer",

abstract = "Chemically modified copper phthalocyanine (CuPc) oligomer with active vinyl groups was successfully bonded to poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)) backbone via free radical graft reaction in solution. Improvement of the dispersibility of CuPc oligomer in polymer matrix was confirmed by TEM-observed morphologies. The size of CuPc particulates in the polymer matrix is in the range of 60-120 nm. This nanocomposite (with 25 wt % CuPc) is very flexible with an elastic modulus of 912 MPa, which is nearly the same as that of the polymer matrix, and presents a breakdown field of 37.7 V/μm, while for the blend of P(VDF-TrFE) and CuPc oligomer, it is 29.7 V/μm. The dielectric constant reaches about 100 at 100 Hz and room temperature, representing a more than 6 times increase compared with the matrix. The grafted nanocomposite exhibits a weaker dielectric dispersion in comparison with the blend of P(VDF-TrFE) and CuPc oligomer, particularly at low-frequency range. The low-frequency dielectric dispersion can be attributed to the Maxwell-Wagner-Sillars polarization mechanism.",

author = "Wang, {Jing Wen} and Shen, {Qun Dong} and Yang, {Chang Zheng} and Zhang, {Qi Ming}",

year = "2004",

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doi = "10.1021/ma035685c",

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T1 - High dielectric constant composite of P(VDF-TrFE) with grafted copper phthalocyanine oligomer

AU - Wang, Jing Wen

AU - Shen, Qun Dong

AU - Yang, Chang Zheng

AU - Zhang, Qi Ming

PY - 2004/3/23

Y1 - 2004/3/23

N2 - Chemically modified copper phthalocyanine (CuPc) oligomer with active vinyl groups was successfully bonded to poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)) backbone via free radical graft reaction in solution. Improvement of the dispersibility of CuPc oligomer in polymer matrix was confirmed by TEM-observed morphologies. The size of CuPc particulates in the polymer matrix is in the range of 60-120 nm. This nanocomposite (with 25 wt % CuPc) is very flexible with an elastic modulus of 912 MPa, which is nearly the same as that of the polymer matrix, and presents a breakdown field of 37.7 V/μm, while for the blend of P(VDF-TrFE) and CuPc oligomer, it is 29.7 V/μm. The dielectric constant reaches about 100 at 100 Hz and room temperature, representing a more than 6 times increase compared with the matrix. The grafted nanocomposite exhibits a weaker dielectric dispersion in comparison with the blend of P(VDF-TrFE) and CuPc oligomer, particularly at low-frequency range. The low-frequency dielectric dispersion can be attributed to the Maxwell-Wagner-Sillars polarization mechanism.

AB - Chemically modified copper phthalocyanine (CuPc) oligomer with active vinyl groups was successfully bonded to poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)) backbone via free radical graft reaction in solution. Improvement of the dispersibility of CuPc oligomer in polymer matrix was confirmed by TEM-observed morphologies. The size of CuPc particulates in the polymer matrix is in the range of 60-120 nm. This nanocomposite (with 25 wt % CuPc) is very flexible with an elastic modulus of 912 MPa, which is nearly the same as that of the polymer matrix, and presents a breakdown field of 37.7 V/μm, while for the blend of P(VDF-TrFE) and CuPc oligomer, it is 29.7 V/μm. The dielectric constant reaches about 100 at 100 Hz and room temperature, representing a more than 6 times increase compared with the matrix. The grafted nanocomposite exhibits a weaker dielectric dispersion in comparison with the blend of P(VDF-TrFE) and CuPc oligomer, particularly at low-frequency range. The low-frequency dielectric dispersion can be attributed to the Maxwell-Wagner-Sillars polarization mechanism.

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High dielectric constant composite of P(VDF-TrFE) with grafted copper phthalocyanine oligomer

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