Cure Kinetics and Thermal Property of UV-Curable Polyester Nanocomposites Coating Modified with MAP-POSS
The UV-curable unsaturated polyester (UPR) was modified with glycidyl methacrylate and methylacryloylpropyl polyhedral oligomeric silsesquioxanes (MAP-POSS), and the cure kinetics of MAP-POSS/UPR system was investigated by non-isothermal DSC. The result shows that UPR, glycidyl methacrylate and MAP-POSS have very good compatibility and can co-cure in free radical polymerization.The curing reaction can be described by a two-parameter autocatalytic Šesták-Berggren (S-B) model. The average reaction activation energy Ea for 6% and 9% MAP-POSS content is 73 kJ/mol and is lower than 0% ( about 82kJ/mol). The mechanical loss peak temperature Tp of curing nanocomposites increase with increasing MAP-POSS content and has a highest value when MAP-POSS content is 9%, which is 114.1 oC and higher about 12 oC than pure UPR.
Jinglong Bu, Zhengyi Jiang and Sihai Jiao
J. G. Gao et al., "Cure Kinetics and Thermal Property of UV-Curable Polyester Nanocomposites Coating Modified with MAP-POSS", Advanced Materials Research, Vols. 150-151, pp. 821-824, 2011