Miscibility studies of polyimide/poly(ether imide) molecular composites

T. Fukai; J. C. Yang; T. Kyu; S. Z D Cheng; S. K. Lee; S. L C Hsu; F. W. Harris

doi:10.1016/0032-3861(92)90646-E

Miscibility studies of polyimide/poly(ether imide) molecular composites

T. Fukai, J. C. Yang, T. Kyu, S. Z D Cheng, S. K. Lee, S. L C Hsu, F. W. Harris

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

26 Citations (Scopus)

Abstract

A new group of miscible mixtures (molecular composites) has been studied by means of differential scanning calorimetry, dielectric relaxation and dynamic mechanical techniques. Three kinds of rigid aromatic polyimides (PI) and a commercial-grade poly(ether imide) (PEI) were mixed by dissolving them in m-cresol and subsequently coagulating in methanol. The mixtures show a single glass transition temperature (T_g) in all compositions in which the T_g increases with increasing PI content. These T_g values are reproducible in repeated heating cycles, suggesting the true miscibility of the blends. This miscibility may be attributed to the similarity of imide structure between the rigid PI and PEI matrix. The bulk PI/PEI indeed shows improved modulus and tensile strength as compared to the pure PEI matrix.

Original language	English
Pages (from-to)	3621-3626
Number of pages	6
Journal	Polymer
Volume	33
Issue number	17
DOIs	https://doi.org/10.1016/0032-3861(92)90646-E
Publication status	Published - 1992
Externally published	Yes

Keywords

dielectric relaxation
differential scanning calorimetry
dynamic mechanical analysis
miscibility
molecular composites
poly(ether imide)
polyimide

ASJC Scopus subject areas

Organic Chemistry
Polymers and Plastics

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10.1016/0032-3861(92)90646-E

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title = "Miscibility studies of polyimide/poly(ether imide) molecular composites",

abstract = "A new group of miscible mixtures (molecular composites) has been studied by means of differential scanning calorimetry, dielectric relaxation and dynamic mechanical techniques. Three kinds of rigid aromatic polyimides (PI) and a commercial-grade poly(ether imide) (PEI) were mixed by dissolving them in m-cresol and subsequently coagulating in methanol. The mixtures show a single glass transition temperature (Tg) in all compositions in which the Tg increases with increasing PI content. These Tg values are reproducible in repeated heating cycles, suggesting the true miscibility of the blends. This miscibility may be attributed to the similarity of imide structure between the rigid PI and PEI matrix. The bulk PI/PEI indeed shows improved modulus and tensile strength as compared to the pure PEI matrix.",

keywords = "dielectric relaxation, differential scanning calorimetry, dynamic mechanical analysis, miscibility, molecular composites, poly(ether imide), polyimide",

author = "T. Fukai and Yang, {J. C.} and T. Kyu and Cheng, {S. Z D} and Lee, {S. K.} and Hsu, {S. L C} and Harris, {F. W.}",

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T1 - Miscibility studies of polyimide/poly(ether imide) molecular composites

AU - Fukai, T.

AU - Yang, J. C.

AU - Kyu, T.

AU - Cheng, S. Z D

AU - Lee, S. K.

AU - Hsu, S. L C

AU - Harris, F. W.

PY - 1992

Y1 - 1992

N2 - A new group of miscible mixtures (molecular composites) has been studied by means of differential scanning calorimetry, dielectric relaxation and dynamic mechanical techniques. Three kinds of rigid aromatic polyimides (PI) and a commercial-grade poly(ether imide) (PEI) were mixed by dissolving them in m-cresol and subsequently coagulating in methanol. The mixtures show a single glass transition temperature (Tg) in all compositions in which the Tg increases with increasing PI content. These Tg values are reproducible in repeated heating cycles, suggesting the true miscibility of the blends. This miscibility may be attributed to the similarity of imide structure between the rigid PI and PEI matrix. The bulk PI/PEI indeed shows improved modulus and tensile strength as compared to the pure PEI matrix.

AB - A new group of miscible mixtures (molecular composites) has been studied by means of differential scanning calorimetry, dielectric relaxation and dynamic mechanical techniques. Three kinds of rigid aromatic polyimides (PI) and a commercial-grade poly(ether imide) (PEI) were mixed by dissolving them in m-cresol and subsequently coagulating in methanol. The mixtures show a single glass transition temperature (Tg) in all compositions in which the Tg increases with increasing PI content. These Tg values are reproducible in repeated heating cycles, suggesting the true miscibility of the blends. This miscibility may be attributed to the similarity of imide structure between the rigid PI and PEI matrix. The bulk PI/PEI indeed shows improved modulus and tensile strength as compared to the pure PEI matrix.

KW - dielectric relaxation

KW - differential scanning calorimetry

KW - dynamic mechanical analysis

KW - miscibility

KW - molecular composites

KW - poly(ether imide)

KW - polyimide

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