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Investigation of the accumulation kinetics of free radicals under irradiation of some polymethylmethacrylate co-polymers in the 270-400 K temperature range

Abstract

In the present work, anomalous shapes of free radical (FR) accumulation curves found under PMMA copolymers irradiation in the T >= 300/sup 0/ K temperature range have been studied. With the irradiation dose increase the FR concentration in PMMA increases up to a definite maximal value and then starts falling. It is stated that appearance of slopes on the FR accumulation curves is not associated with possible changes of the FR relaxation characteristics. The second order of the FR decay reactions is estimated with the activation energy E = 8.3 kcal/mol. It is suggested that the FR decay processes in the irradiation temperature range T >= 300/sup 0/ K are due to the fast decay of macrochains according to the 'unzipping' mechanism.
Authors:
Pivovarov, S P; Poljakov, A I; Rjabikin, Y A; Philippov, N L; Bitenbaev, M I [1] 
  1. AN Kazakhskoj SSR, Alma-Ata. Inst. Yadernoj Fiziki
Publication Date:
Feb 01, 1982
Product Type:
Journal Article
Reference Number:
AIX-13-683282; EDB-82-144548
Resource Relation:
Journal Name: Radiat. Eff.; (United Kingdom); Journal Volume: 59:3-4
Subject:
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY; COPOLYMERS; RADIOLYSIS; PMMA; ACTIVATION ENERGY; CHEMICAL REACTION KINETICS; MEDIUM TEMPERATURE; RADIATION DOSES; RADICALS; TEMPERATURE DEPENDENCE; CHEMICAL RADIATION EFFECTS; CHEMICAL REACTIONS; CHEMISTRY; DECOMPOSITION; DOSES; ENERGY; ESTERS; KINETICS; ORGANIC COMPOUNDS; ORGANIC POLYMERS; POLYACRYLATES; POLYMERS; POLYVINYLS; RADIATION CHEMISTRY; RADIATION EFFECTS; REACTION KINETICS; 400600* - Radiation Chemistry
OSTI ID:
5145790
Country of Origin:
United Kingdom
Language:
English
Other Identifying Numbers:
Journal ID: CODEN: RAEFB
Submitting Site:
HEDB
Size:
Pages: 179-182
Announcement Date:
Jun 01, 1982

Citation Formats

Pivovarov, S P, Poljakov, A I, Rjabikin, Y A, Philippov, N L, and Bitenbaev, M I. Investigation of the accumulation kinetics of free radicals under irradiation of some polymethylmethacrylate co-polymers in the 270-400 K temperature range. United Kingdom: N. p., 1982. Web. doi:10.1080/00337578208237500.
Pivovarov, S P, Poljakov, A I, Rjabikin, Y A, Philippov, N L, & Bitenbaev, M I. Investigation of the accumulation kinetics of free radicals under irradiation of some polymethylmethacrylate co-polymers in the 270-400 K temperature range. United Kingdom. https://doi.org/10.1080/00337578208237500
Pivovarov, S P, Poljakov, A I, Rjabikin, Y A, Philippov, N L, and Bitenbaev, M I. 1982. "Investigation of the accumulation kinetics of free radicals under irradiation of some polymethylmethacrylate co-polymers in the 270-400 K temperature range." United Kingdom. https://doi.org/10.1080/00337578208237500.
@misc{etde_5145790,
title = {Investigation of the accumulation kinetics of free radicals under irradiation of some polymethylmethacrylate co-polymers in the 270-400 K temperature range}
author = {Pivovarov, S P, Poljakov, A I, Rjabikin, Y A, Philippov, N L, and Bitenbaev, M I}
abstractNote = {In the present work, anomalous shapes of free radical (FR) accumulation curves found under PMMA copolymers irradiation in the T >= 300/sup 0/ K temperature range have been studied. With the irradiation dose increase the FR concentration in PMMA increases up to a definite maximal value and then starts falling. It is stated that appearance of slopes on the FR accumulation curves is not associated with possible changes of the FR relaxation characteristics. The second order of the FR decay reactions is estimated with the activation energy E = 8.3 kcal/mol. It is suggested that the FR decay processes in the irradiation temperature range T >= 300/sup 0/ K are due to the fast decay of macrochains according to the 'unzipping' mechanism.}
doi = {10.1080/00337578208237500}
journal = []
volume = {59:3-4}
journal type = {AC}
place = {United Kingdom}
year = {1982}
month = {Feb}
}