Synthesis and Characterization of Cycloaliphatic Siloxanes Copolymers
Both random and block siloxane copolymers were synthesized with methyl, and cyclopentyl, or cyclohexyl substituents. Random copolymers were obtained by hydrolytic condensation of dimethyldichlorosilane and dicyclopentyldichlorosilane or dicyclohexanedichlorosilane. Block polymers were prepared using cyclic oligomers via a ring opening polymerization (ROP). Amberlyst-15 was used as the catalyst for ROP. The synthesized polymers were characterized by 1H-NMR, 13C-NMR, 29Si-NMR, FT-IR, and GPC. The glass transition temperatures of the siloxanes were measured using DSC and DMA. The random and block structures were identified via NMR. As expected, The Tg of the copolymers were intermediate between those of the homopolymers.
Soucek, Mark, "Synthesis and Characterization of Cycloaliphatic Siloxanes Copolymers" (2010). Polymer Engineering Faculty Research. 1841.