Towards identifying the new structures formed on the gamma-radiolysis of Ultem

David Brereton; Sheila Devasahayam; David J. T. Hill; Andrew K. Whittaker

doi:10.1016/S0969-806X(03)00350-5

Towards identifying the new structures formed on the gamma-radiolysis of Ultem

David Brereton, Sheila Devasahayam, David J. T. Hill, Andrew K. Whittaker

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

8 Citations (Scopus)

Abstract

Ultem irradiated up to 10.0 MGy has been analysed using C-13, H-1 and D-2 proton-carbon and proton-proton correlation NMR spectroscopy to shed light on the formation of new structures. Chemical shifts and correlation data were used to determine the structure or partial structures of several new components. The spectra indicated the presence of new groups and structures involving the isopropylidene group, the imide ring, and hydrogen-abstraction reactions. Possible pathways for formation of the new structures are proposed and the G-values for their formation have been estimated. (C) 2003 Elsevier Science Ltd. All rights reserved.

Original language	English
Pages (from-to)	65-77
Number of pages	13
Journal	Radiation Physics and Chemistry
Volume	69
Issue number	1
DOIs	https://doi.org/10.1016/S0969-806X(03)00350-5
Publication status	Published - Jan 2004
Externally published	Yes

Keywords

Ultem
gamma-radiolysis
NMR
partial structures
RADIATION-CHEMISTRY
SPECTROSCOPY
POLYETHERIMIDES
POLYCARBONATE
SENSITIVITY
BISPHENOL
ESR

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10.1016/S0969-806X(03)00350-5

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title = "Towards identifying the new structures formed on the gamma-radiolysis of Ultem",

abstract = "Ultem irradiated up to 10.0 MGy has been analysed using C-13, H-1 and D-2 proton-carbon and proton-proton correlation NMR spectroscopy to shed light on the formation of new structures. Chemical shifts and correlation data were used to determine the structure or partial structures of several new components. The spectra indicated the presence of new groups and structures involving the isopropylidene group, the imide ring, and hydrogen-abstraction reactions. Possible pathways for formation of the new structures are proposed and the G-values for their formation have been estimated. (C) 2003 Elsevier Science Ltd. All rights reserved.",

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author = "David Brereton and Sheila Devasahayam and Hill, {David J. T.} and Whittaker, {Andrew K.}",

year = "2004",

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doi = "10.1016/S0969-806X(03)00350-5",

language = "English",

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journal = "Radiation Physics and Chemistry",

issn = "0969-806X",

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TY - JOUR

T1 - Towards identifying the new structures formed on the gamma-radiolysis of Ultem

AU - Brereton, David

AU - Devasahayam, Sheila

AU - Hill, David J. T.

AU - Whittaker, Andrew K.

PY - 2004/1

Y1 - 2004/1

N2 - Ultem irradiated up to 10.0 MGy has been analysed using C-13, H-1 and D-2 proton-carbon and proton-proton correlation NMR spectroscopy to shed light on the formation of new structures. Chemical shifts and correlation data were used to determine the structure or partial structures of several new components. The spectra indicated the presence of new groups and structures involving the isopropylidene group, the imide ring, and hydrogen-abstraction reactions. Possible pathways for formation of the new structures are proposed and the G-values for their formation have been estimated. (C) 2003 Elsevier Science Ltd. All rights reserved.

AB - Ultem irradiated up to 10.0 MGy has been analysed using C-13, H-1 and D-2 proton-carbon and proton-proton correlation NMR spectroscopy to shed light on the formation of new structures. Chemical shifts and correlation data were used to determine the structure or partial structures of several new components. The spectra indicated the presence of new groups and structures involving the isopropylidene group, the imide ring, and hydrogen-abstraction reactions. Possible pathways for formation of the new structures are proposed and the G-values for their formation have been estimated. (C) 2003 Elsevier Science Ltd. All rights reserved.

KW - Ultem

KW - gamma-radiolysis

KW - NMR

KW - partial structures

KW - RADIATION-CHEMISTRY

KW - SPECTROSCOPY

KW - POLYETHERIMIDES

KW - POLYCARBONATE

KW - SENSITIVITY

KW - BISPHENOL

KW - ESR

U2 - 10.1016/S0969-806X(03)00350-5

DO - 10.1016/S0969-806X(03)00350-5

M3 - Article

SN - 0969-806X

VL - 69

SP - 65

EP - 77

JO - Radiation Physics and Chemistry

JF - Radiation Physics and Chemistry

IS - 1

ER -

Towards identifying the new structures formed on the gamma-radiolysis of Ultem

Abstract

Keywords

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