Positron annihilation studies of a conjugated polymer

W. F. Huang; Z. J. Xu; T. C. Chung; K. C. Lim

doi:10.1016/0375-9601(88)90014-X

Positron annihilation studies of a conjugated polymer

W. F. Huang, Z. J. Xu, T. C. Chung, K. C. Lim

Materials Science and Engineering

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Abstract

Lineshapes of the Doppler broadened annihilation radiation (DBAR) of a conjugated polymer polydiacetylene, 4-butoxycarbonylmethylurethane (P-4BCMU), in its amorphous state, were measured over the temperature range of 30 to 190°C. A differential-scanning-calorimeter (DSC) was used to correlate the transition temperatures. The DBAR lineshapes show a distinct change during the structural transitions of the polymer. A two states trapping model is used to qualitatively describe the temperature dependence of the lineshape. The nature of formation of the trapped states of positrons above T_c, through the interplay of electronic structure/conformation change, is discussed.

Original language	English (US)
Pages (from-to)	411-414
Number of pages	4
Journal	Physics Letters A
Volume	129
Issue number	7
DOIs	https://doi.org/10.1016/0375-9601(88)90014-X
State	Published - Jun 6 1988

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1016/0375-9601(88)90014-X

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title = "Positron annihilation studies of a conjugated polymer",

abstract = "Lineshapes of the Doppler broadened annihilation radiation (DBAR) of a conjugated polymer polydiacetylene, 4-butoxycarbonylmethylurethane (P-4BCMU), in its amorphous state, were measured over the temperature range of 30 to 190°C. A differential-scanning-calorimeter (DSC) was used to correlate the transition temperatures. The DBAR lineshapes show a distinct change during the structural transitions of the polymer. A two states trapping model is used to qualitatively describe the temperature dependence of the lineshape. The nature of formation of the trapped states of positrons above Tc, through the interplay of electronic structure/conformation change, is discussed.",

author = "Huang, {W. F.} and Xu, {Z. J.} and Chung, {T. C.} and Lim, {K. C.}",

note = "Funding Information: Two of the authors (WFH and ZJX) gratefully acknowledge financial assistance from the Graduate Research Council of the University of Louisville for the project.",

year = "1988",

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doi = "10.1016/0375-9601(88)90014-X",

language = "English (US)",

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TY - JOUR

T1 - Positron annihilation studies of a conjugated polymer

AU - Huang, W. F.

AU - Xu, Z. J.

AU - Chung, T. C.

AU - Lim, K. C.

N1 - Funding Information: Two of the authors (WFH and ZJX) gratefully acknowledge financial assistance from the Graduate Research Council of the University of Louisville for the project.

PY - 1988/6/6

Y1 - 1988/6/6

N2 - Lineshapes of the Doppler broadened annihilation radiation (DBAR) of a conjugated polymer polydiacetylene, 4-butoxycarbonylmethylurethane (P-4BCMU), in its amorphous state, were measured over the temperature range of 30 to 190°C. A differential-scanning-calorimeter (DSC) was used to correlate the transition temperatures. The DBAR lineshapes show a distinct change during the structural transitions of the polymer. A two states trapping model is used to qualitatively describe the temperature dependence of the lineshape. The nature of formation of the trapped states of positrons above Tc, through the interplay of electronic structure/conformation change, is discussed.

AB - Lineshapes of the Doppler broadened annihilation radiation (DBAR) of a conjugated polymer polydiacetylene, 4-butoxycarbonylmethylurethane (P-4BCMU), in its amorphous state, were measured over the temperature range of 30 to 190°C. A differential-scanning-calorimeter (DSC) was used to correlate the transition temperatures. The DBAR lineshapes show a distinct change during the structural transitions of the polymer. A two states trapping model is used to qualitatively describe the temperature dependence of the lineshape. The nature of formation of the trapped states of positrons above Tc, through the interplay of electronic structure/conformation change, is discussed.

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Positron annihilation studies of a conjugated polymer

Abstract

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