𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Thermal analysis of electroinitiated and radiation induced poly(epoxycyclopentanes) and poly(epoxycyclohexanes) by mass spectrometry

✍ Scribed by Jale Hacaloglu; Ahmet M. Önal

Publisher
Elsevier Science
Year
1995
Tongue
English
Weight
394 KB
Volume
31
Category
Article
ISSN
0014-3057

No coin nor oath required. For personal study only.

✦ Synopsis

Thermal behaviour of electroinitiated and radiation induced poly(epoxycyclopentanes), PECP, and poly(epoxycyclohexanes), PECH, have been studied by a direct pyrolysis mass spectrometry technique. The mechanism of thermal degradation of the samples prepared by electroinitiation was found to be a radical depolymerization mechanism yielding mainly monomer. The broader temperature ranges of thermal decomposition in the case of polymer samples prepared by irradiation may be attributed to more complicated degradation mechanisms such as random bond cleavages for PECP and dehydrogenation reactions stabilizing high mass fragments before decomposition of the main chain for PECH.

📜 SIMILAR VOLUMES

Primary thermal degradation processes of
Primary thermal degradation processes of poly(ether-sulfone) and poly(phenylene oxide) investigated by direct pyrolysis-mass spectrometry
✍ Giorgio Montaudo; Concetto Puglisi; R. Rapisardi; Filippo Samperi 📂 Article 📅 1994 🏛 John Wiley and Sons 🌐 English ⚖ 590 KB

## Abstract The thermal degradation processes which occur in poly(ether‐sulfone) (PES) and poly(phenylene oxide) (PPO) have been studied by Direct Pyrolysis‐Mass Spectrometry (DPMS). The pyrolysis mass spectra of PES and PPO contain molecular ions up to __m/z__ 700, corresponding to pyrolysis compo

Primary thermal degradation processes of
Primary thermal degradation processes of poly(ether/ketone) and poly(ether ketone)/poly(ether-sulfone) copolymers investigated by direct pyrolysis-mass spectrometry
✍ Giorgio Montaudo; Concetto Puglisi; Filippo Samperi 📂 Article 📅 1994 🏛 John Wiley and Sons 🌐 English ⚖ 574 KB

## Abstract The mechanisms of thermal degradation of poly(ether‐ketone) (PEK) and four poly(ether‐ketone)/poly(ether‐sulfone) copolymers (PEK/PES) have been investigated by direct pyrolysis‐mass spectrometry (DPMS). Several families of pyrolysis compounds with H, OH and CHO end‐groups have been ide

Analysis of radiation induced nucleobase
Analysis of radiation induced nucleobase–peptide crosslinks by electrospray ionization mass spectrometry
✍ Mary S. Weir Lipton; Alfred L. Fuciarelli; David L. Springer; Steven A. Hofstadl 📂 Article 📅 1997 🏛 John Wiley and Sons 🌐 English ⚖ 83 KB 👁 2 views

Upon exposure to ionizing radiation, DNA undergoes a variety of modifications including the production of a covalent bond between the nucleobase thymine and the amino acid tyrosine. These crosslinked lesions, produced in cells exposed to ionizing radiation, if unrepaired are thought to result in cel

Thermal decomposition characteristics of
Thermal decomposition characteristics of poly[diethyl-2-(methacryloyloxy)ethyl phosphate] using thermogravimetric analysis/mass spectrometry
✍ L. H. Perng; C. J. Tsai; Y. C. Ling; S. D. Wang; C. Y. Hsu 📂 Article 📅 2002 🏛 John Wiley and Sons 🌐 English ⚖ 185 KB 👁 2 views

## Abstract The thermal decomposition of poly[diethyl 2‐(methacryloyloxy)ethyl phosphate] (PDMP) by free‐radical polymerization was studied by the combination of pyrolysis‐gas chromatography/mass spectrometry (Py‐GC/MS) with thermogravimetric analysis/mass spectrometry (TG/MS), in which the former