Sotaro Inomata, Y. Harada, Yuya Nakamura
Oct 1, 2013
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0
Influential Citations
8
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Journal
Journal of Polymer Science Part A
Abstract
Cationic ring-opening polymerizations of 5-alkyl- or 5,7-dialkyl-1,3-dehydroadamantanes, such as 5-hexyl- (4), 5-octyl- (5), 5-butyl-7-isobutyl- (6), 5-ethyl-7-hexyl- (7), and 5-butyl-7-hexyl-1,3-dehydroadamantane (8), were carried out with super Bronsted acids, such as trifluoromethanesulfonic acid or trifluoromethanesulfonimide in CH2Cl2 or n-heptane. The ring-opening polymerizations of inverted carbon–carbon bonds in 4–8 proceeded to afford corresponding poly(1,3-adamantane)s in good to quantitative yields. Poly(4–8)s possessing alkyl substituents were soluble in 1,2-dichlorobenzene, although a nonsubstituted poly(1,3-adamantane) was not soluble in any organic solvent. In particular, poly(8) exhibited the highest molecular weight at around 7500 g mol−1 and showed excellent solubility in common organic solvents, such as THF, CHCl3, benzene, and hexane. The resulting poly(4–8)s containing adamantane-1,3-diyl linkages showed good thermal stability, and 10% weight loss temperatures (T10) were observed over 400 °C. © 2013 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2013, 51, 4111–4124