Broadband dielectric study on binary blends of bisphenol-A and tetramethylbisphenol-A polycarbonate

Broadband dielectric study on binary blends of bisphenol-A and tetramethylbisphenol-A polycarbonate

Broadband dielectric spectroscopy (10 exp --1 -10 exp 7 Hz) and differential scanning calorimetry (DSC) have been used to study the alpha - and beta -relaxations in blends of bisphenol-A polycarbonate (BPA-PC) and tetramethylbisphenol-A polycarbonate (TMBPA-PC) in the temperature range from 93-553K....

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Veröffentlicht in:Macromolecules 1993-06, Vol.26 (12), p.3075-3080
Hauptverfasser: Katana, G, Kremer, F, Fischer, E. W, Plaetschke, R
Format: Artikel
Sprache:eng
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Applied sciences
Electrical, magnetic and optical properties
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Properties and characterization
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container_end_page 3080
container_issue 12
container_start_page 3075
container_title Macromolecules
container_volume 26
creator Katana, G
Kremer, F
Fischer, E. W
Plaetschke, R
description Broadband dielectric spectroscopy (10 exp --1 -10 exp 7 Hz) and differential scanning calorimetry (DSC) have been used to study the alpha - and beta -relaxations in blends of bisphenol-A polycarbonate (BPA-PC) and tetramethylbisphenol-A polycarbonate (TMBPA-PC) in the temperature range from 93-553K. All blends show one broadened alpha -relaxation as compared with the homopolymers. At temperatures below T sub g the beta -relaxations corresponding to both homopolymers are observed in the blends. The beta -relaxation strength obeys dilution laws with no indication of a critical TMBPA-PC concentration above which the beta -relaxation in BPA-PC is totally suppressed.
doi_str_mv 10.1021/ma00064a013
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subjects Applied sciences
Electrical, magnetic and optical properties
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Properties and characterization
title Broadband dielectric study on binary blends of bisphenol-A and tetramethylbisphenol-A polycarbonate
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