volume 9, issue 12, P2111-2117 1971
DOI: 10.1002/pol.1971.160091201
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Abstract: Abstract The two types of radicals trapped in γ‐irradiated poly(ethylene 2,6‐naphthalene dicarboxylate) (PEN 2,6) have been identified by ESR as OCHCH2O (radical I) and a radical located on the naphthalene ring (radical II). The relative concentrations of radicals in the gross polymer are 10–20% radical I and 80–90% radical II. Similar trapped radicals have been identified in γ‐irradiated poly(ethylene terephthalate) (PET), a structurally related polymer which differs only in the aromatic moiety, but the…

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