苯乙烯-丁二烯共聚物环化物的工艺优化及吸氧性能研究

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

摘要:

采用正交试验设计，进行苯乙烯-丁二烯共聚物环化物（环化SBS）的制备研究，以吸氧性能为评价指标，对影响环化SBS吸氧共混物吸氧性能的工艺因素进行优化，同时，试验评价贮存时间、温度、湿度等条件对环化SBS吸氧共混物吸氧性能的影响。结果表明，环化SBS的优化合成条件为：SBS的质量分数20%，对甲苯磺酸的质量分数0.2%，反应温度75 ℃，反应时间3 h，在该条件下制备的环化SBS吸氧共混物的吸氧能力达40.5 mL/g，吸氧速率为0.129 mL/（g·cm2·d）。随着贮存时间的延长以及贮存温度的升高，吸氧共混物的吸氧性能有所降低；贮存湿度对于吸氧共混物的吸氧性能影响不显著。

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.