N. Tsutsumi, Yoshitsugu Nishikawa, T. Kiyotsukuri
1992
Citations
0
Influential Citations
7
Citations
Journal
Polymer
Abstract
Abstract The synthesis of copolymers of vinyl p-tert-butylbenzoate (PTBBA) with 3-methacryloxypropyltris(trimethylsiloxy)silane (Si-1) and their properties including oxygen permeability are presented. All copolymers had molecular weights above 105 and were easily processable by casting from benzene solution. The Si-1 comonomer content in the obtained copolymer was estimated from the change in the characteristic infra-red absorption due to the carbonyl group of PTBBA and Si-1 units and the benzene ring of the PTBBA unit. The oxygen permeability PO2 increases from 9.1 × 10−10 cm3 (STP) cm(cm2 s cmHg)−1 for the PTBBA homopolymer to 1.6 × 10−8 cm3 (STP) cm(cm2 s cmHg)−1 for the Si-1 homopolymer, whereas the corresponding ratio of P O 2 P N 2 decreases from 2.7 to 2.2. PO2 and P O 2 P N 2 for the copolymer reach a plateau around 25–65 Si-1 mol%, where the values are 0.9 × 10−8 −1 × 10−8 cm3 (STP) cm(cm2 s cmHg)−1 and 2.4–2.5, respectively. The logarithmic value of PO2 linearly increases with decreasing glass transition temperature.