Synthesis and properties of brominated poly(1-trimethylsilyl-1-propyne)

Abstract

A procedure of selective bromination of poly(1-trimethylsilyl-1-propyne) using N-bromosuccinimide as the brominating agent was developed. This method allows to obtain samples with different bromine content depending on the process conditions. The obtained brominecontaining polymers have good film-forming properties, satisfactory thermal and thermo-oxidative stability. The introduction of bromine atoms into the polymer increases the stability of the latter to aliphatic hydrocarbons C₅—C₁₂ and improves hydrophobicity. With an increase of bromine content in the polymer, the selectivity of separation of gas pairs CO₂/N₂, CO₂/H₂, and O₂/N₂ increases, while the level of permeability remains high.