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Two strategies are envisioned to improve the thermal stability of the grafted layer and to allow the processing of the random copolymer/block copolymer (RCP/BCP) system at high temperature. From one side, a high-temperature thermal treatment of a commercial α-hydroxyl ω-2,2,6,6-tetramethylpiperidinyloxy functional RCP, namely, TR58, leads to the formation of a stabilized layer able to induce the perpendicular orientation of a symmetric BCP to temperatures higher than 310 °C. On the other side, an α-hydroxyl ω-Br functional RCP, namely, BrR58, with the same molar mass and composition of TR58, was prepared by activator regenerated by electron transfer atom transfer radical polymerization. The resulting brush layer can sustain the self-assembly of the symmetric BCP for processing temperatures as high as 330 °C. In both systems, the disruption of the BCP film, deposited on the grafted RCP layer, occurs …
American Chemical Society
Publication date: 
17 Feb 2015

Katia Sparnacci, Diego Antonioli, Valentina Gianotti, Michele Laus, Giampaolo Zuccheri, Federico Ferrarese Lupi, Tommaso Jacopo Giammaria, Gabriele Seguini, Monica Ceresoli, Michele Perego

Biblio References: 
Volume: 7 Issue: 7 Pages: 3920-3930
ACS applied materials & interfaces