Thermal and gas permeation properties of copolymers derived from 3‐methacryloxypropyltris(trimethylsiloxy)silane and adamantyl group‐containing methacrylate derivatives

Abstract

Novel copolymer membranes derived from three types of adamantyl group‐containing methacrylate derivatives and 3‐methacryloxypropyltris(trimethylsiloxy)silane (SiMA) were synthesized via free radical polymerization. The thermal and permeation properties of these copolymer membranes were investigated. Copolymer membranes with less than 11.9 mol % adamantane content exhibited good membrane forming abilities that are suitable for permeation measurement. The decomposition temperature of all copolymers increased up to approximately 40–80°C with increasing adamantane content compared with poly(SiMA). Moreover, the glass transition temperature (Tg) of all copolymers increased up to approximately 46–60°C with increasing adamantane content compared with the theoretical value, which was estimated from Fox equation. 1‐Adamantyl methacrylate copolymer had the highest fractional free volume among the three types of adamantly group‐containing methacrylate derivatives. The gas permeability coefficient of this copolymer increased by 22–45% with increasing adamantane content compared with that of poly(SiMA). © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43129.

Phototransparency and water vapor sorption properties of ABA‐type triblock copolymers derived from 6FDA‐TeMPD and poly(2‐methyl‐2‐adamantylmethacrylate)

“…Thus, Langmuir site was depended on adamantane content. Moreover, PI that has higher T g than PMAdMA (PI: 424 °C, PMAdMA: 141 °C) restricted molecular mobility of adamantane block on one side chain. Therefore, relative pressure at clustering begin of Block(14/86) was higher than PMAdMA homopolymer.…”

“…Given its structure, adamantane has high phototransparency and is colorless because of its narrow absorbent area of visible lights . In addition, adamantane was reported by some study that enhances thermal stability and gas permeability of polymer because its bulky structure restricts the mobility of polymer chains. Moreover, 2‐MAdMA was the best effectively inhibited the water vapor interaction in the homopolymer of methacrylate derivatives in previous study …”