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苯乙烯在烷基功能化硅单晶表面的原位活性自由基聚合反应

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摘要 介绍了一种在单晶硅表面制备聚苯乙烯刷子的新方法,此方法分3步进行:(ⅰ)将3-甲基丙烯酰氧基丙基三甲氧基硅烷接枝到单晶硅表面,(ⅱ)以偶氮二异丁腈(AIBN)为催化剂,将2,2,6,6-四甲基哌啶-N-氧基-1-羟基(HTEMPO·)引入3-甲基丙烯酰氧基丙基三甲氧基硅烷的末端,(ⅲ)在HTEMPO·存在下,苯乙烯进行活性自由基聚合反应.可控活性自由基聚合反应可以精确控制分子量及其分布.光电子能谱(XPS)的测试结果表明,带有引发剂的烷氧基链已接枝到单晶硅表面.XPS和橢偏仪的测试结果表明,聚苯乙烯以化学键的方式被锚接到了单晶硅上.接枝聚合物层的厚度可由反应时间来精确控制.用此方法可以在基体表面合成无规共聚物或嵌段共聚物.
出处 《中国科学(B辑)》 CSCD 北大核心 2005年第5期401-408,共8页 Science in China(Series B)
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