New Monofunctional POSS and Its Utilization as Dewetting Additive in Methacrylate Based Free-Standing Films

作者：Mammeri Fayna^*; Bonhomme Christian; Ribot Francois; Babonneau Florence; Dire Sandra

来源：Chemistry of Materials, 2009, 21(18): 4163-4171.

DOI：10.1021/cm900339h

New polyhedral oligomeric silsesquioxanes (POSS), ((i)BuSi)(7)O(12)SiOSi(Me)(2)CH(2)(CH(2))(n)CH(2)OC(O)C(CH(3))=CH(2) bearing one single methacrylate group, were synthesized by hydrosilylation of allylalcohol or 4-penten-1-ol, followed by acylation with methacryloyl chloride. All intermediates and final derivatives were carefully characterized by FTIR, (1)H, (13)C, and (29)Si solution state NMR, size exclusion chromatography (SEC), MALDI-TOF MS, and powder XRD (including full indexation of the diffraction patterns). In a second step, POSS/methacrylate based films were prepared. For 10 wt % of POSS, phase separation occurs with concomitant POSS crystallization. This behavior is not observed for 2 wt %, but XPS analyses show migration of POSS toward the film-air interface, which led to improved hydrophobic properties of the UV polymerized films with a 30 degrees increase in contact angle.

• 出版日期2009-9-22