Process Optimization and Oxygen Scavenging Properties of Styrene-Butadiene Triblock Copolymer

Abstract:

The optimal preparation for cyclized styrene-butadiene copolymer（SBS） was investigated using an orthogonal array design with the oxygen scavenging properties as dependent variables and the effects of storage time，temperature and humidity were evaluated. The optimal preparation parameters were 20% of SBS，0.2% of toluene sulfonic acid，reaction temperature 75 ℃ and reaction time 3 h，which resulted in an oxygen scavenging ability of 40.5 mL/g and a scavenging rate of 0.129 mL /（g·cm2·d）. Besides，the oxygen scavenging properties of cyclized SBS oxygen scavenging blends decreased with increased storage time and temperature whereas humidity had no significant effect.