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Radiation degradation of α‐substituted acrylate polymers and copolymers
Author(s) -
Helbert John N.,
Caplan Philip J.,
Poindexter Edward H.
Publication year - 1977
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1977.070210320
Subject(s) - copolymer , polymer , materials science , polymer chemistry , radical , degradation (telecommunications) , irradiation , electron paramagnetic resonance , acrylate , chemistry , organic chemistry , composite material , telecommunications , physics , nuclear magnetic resonance , computer science , nuclear physics
Abstract Radiation degradation is observed in poly(methyl α‐chloroacrylate), poly(methyl α‐cyanoacrylate), and poly(α‐chloroacrylonitrile) homopolymers and their respective MMA copolymers when γ‐irradiated in vacuo. Polymer degradation susceptibilities are quantified in terms of G (scission radicals) and G (scission) − G (crosslinks), measured by EPR and membrane osmometry, respectively, values by these two methods are compared. Higher G (rads) values ranging from 2 to 6 and [ G ( s ) − G ( x )] values ranging from 2 to 11 are obtained for the substituted polymers and copolymers relative to the values for PMMA (1.6; 1.9), a standard e ‐beam positive resist, which suggests that these modified polymers are more sensitive e ‐beam resists than PMMA.