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Nonisothermal Co-Polymerizing Behavior and Thermal Properties of Methylacyloxylpropyl-POSS with Styrene

The methylacryloylpropyl-polyhedral oligomeric silsesquioxanes (MAP-POSS) was introduced into the PSt by copolymerization. The copolymerizing kinetics was investigated by non-isothermal DSC. The mechanical loss peak temperature T p and thermal properties were determined by DMA and TGA. The results show that the compatibility of MAP-POSS with styrene is very well and can copolymerization. The relationship of polymerization E a and conversion α be obtained. The copolymerization reactions can be described by the autocatalytic Šesták-Berggren (S-B) equation. The T p was increased about 13°C than pure PSt, and up to a maximum of 110.8°C when the MAP-POSS contents is 10 wt%.