摘要
目的制备环化SBS吸氧共混物并对其性能进行研究。方法以苯乙烯-丁二烯共聚物(SBS)为原料,在对甲苯磺酸的催化作用下,制备苯乙烯-丁二烯共聚物环化物(环化SBS)。将环化SBS与引发剂、过渡金属催化剂共混制备环化SBS吸氧共混物,经紫外光照射引发吸氧反应从而吸收氧气。研究环化SBS吸氧共混物的吸氧性能,以及吸氧反应对吸氧共混物结构与性能的影响。结果吸氧共混物的吸氧量在第4天时就达到30.7 m L/g,随着时间的延长,吸氧量继续增加,在第10天时基本达到平衡,最大吸氧量为40.2 m L/g。环化SBS经紫外光照射引发吸氧后生成醇类物质,吸氧后环化SBS吸氧共混物的拉伸强度与断裂伸长率均略有降低,但是变化不显著。结论试验制备的环化SBS吸氧共混物具有良好的吸氧性能,可用于制备单层/多层吸氧薄膜。
Cyclized SBS oxygen scavenging blend was prepared and its properties were studied. The cyclized styrene-butadiene triblock copolymer（cyclized SBS） was prepared with styrene-butadiene triblock copolymer（SBS） as raw material and p-toluene sulphonic acid as catalyst. The oxygen scavenging blend was prepared by blending cyclized SBS,photoinitiator, and transition metal catalyst, triggering oxygen scavenging reaction after UV irradiation. The oxygen scavenging property and the effects of oxygen scavenging reaction on the structure and properties of oxygen scavenging blend were studied. The oxygen scavenging quantity achieved 30.7 m L/g on the fourth day. The O2 uptake continued to increase over time, and became generally balanced on the tenth day. After oxygen scavenging reaction, cyclized SBS was oxidized into alcohols. The tensile strength and the elongation at break of the blend film slightly decreased after oxygen scavenging, but the changes were not significant. In conclusion, the oxygen scavenging blend prepared in this work has good oxygen scavenging performance, and can be used to prepare single-layer/multi-layer oxygen scavenging film.
出处
《包装工程》
CAS
CSCD
北大核心
2015年第23期58-61,共4页
Packaging Engineering
关键词
SBS
环化SBS
吸氧
SBS
cyclized SBS
oxygen scavenging
