中文摘要：

在2，2，6，6-四甲基-1-哌啶氧自由基（TEMPO）存在的情况下，通过波长为253～254nm的紫外光引发氮氧调控自由基原位接枝聚合反应，将聚甲基丙烯酸甲酯（PMMA）接枝到聚苯乙烯（PS）薄膜上，制得PMMA刷子层。通过红外光谱检测了这个调控自由基聚合反应的历程。结果表明，PMMA在PS薄膜表面的接枝聚合反应为“活性”自由基聚合反应，所得到的PMMA相对分子质量分布范围窄（1．13～1．36），相对分子质量可被控制在11764-52403g／mol范围内。红外光谱显示PMMA被接枝到PS薄膜表面。PMMA刷子层能够控制PS表面亲水性能，随着接枝时间的延长，水接触角由92°下降到72°，接枝后的PS表面水润湿性能明显提高。

英文摘要：

In the presence of 2, 2,6, 6-tetramethyl-1-piperidinoxyl （TEMPO）, methyl methacrylate （MMA） was in situ grafted onto the surface of a polystyrene film initiated with UV light with wave length of 253--254 nm generating a polymer brush. The grafting of PMMA branches was verified using FTIR. It showed that the grafting polymerization was a living one and a narrow molecular distribution （ 1.13--1.36） was achieved with the molecular weight of the grafted branches controlled in the range of 11 764 g/mol to 52 403 g/mol. The water wetting of the modified PS surface was tailored by grafting polymerization time, with the contact angle decreased from 92° and 72°.