Synthesis of polythioether via thiol-ene free-radical polymerization

Polythioether was synthesized from dithiol and divinyl ether monomers via thiol-ene free radical reaction. 1,8-Dimercapto-3,6-dioxaoctane (DMDO) and triethylene glycol divinyl ether (TEG-DVE) were used as dithiol and diene monomers, respectively. Also, triallyle cyanurate (TAC) was used as a branching agent for polythioether. Fourier transform infrared spectroscopy analysis has been employed to study molecular structure of polymers. The average molecular weight and glass transition temperature (Tg) of synthesized polymer were determined by Gel Permeation Chromatography (GPC) and Differential Scanning Calorimetry (DSC), respectively. According to the result of DSC, Tg of polythioether is below the room temperature that leads to high flexibility of polythioether like elastomers.

کلیدواژه ها:

Polythioether ، Thiol-ene Reaction ، Glass Transition Temperature