The effects of the presence of trapped radicals after UV irradiation were studied on a dimethacrylate oligomer. The postpolymerization reaction was characterized by differential scanning calorimetry and dynamic mechanical analysis. The photopolymerization was realized with 2,2-dimethyl-2-hydroxyacetophenone (Darocur 1173) as radical photoinitiator by using isothermal photocalorimetry. The postpolymerization was clearly shown in the isothermal mode and under N2 atmosphere by following the variation of the glass transition temperature of the samples. The influence of crosslinking density, O2 and thermal postcure were investigated.
Посилання на статтю:
Photoinitiated polymerization of a dimethacrylate oligomer Part 3. Postpolymerization study / L. Lecamp, B. Youssef, C. Bunel, P. Lebaudy // Polymer. – 1999. – N 40. – P. 6313–6320.