Abstract
In order to investigate the mechanism of the solid state photopolymerization of single crystals of the bis(p-toluene sulphonate) ester of 2,4-hexadiyne-1,6 diol (TSHD) the low temperature UV-photoproducts are analyzed by ESR-spectroscopy. In this paper we report the fine structure, hyperfine structure and temperature dependence of a series of thermally activated triplet diradicals. The structure of these diradical dimer and trimer initiators of the UV-photopolymerization process is deduced from the analysis of the ESR data.
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