摘要
用原子转移自由基聚合(ATRP)与自缩合乙烯基聚合(SCVP)相结合合成超支化聚合物聚对氯甲基苯乙烯(PCMS),该聚合物每个分枝均以卤素原子封端.用叠氮化反应将卤素原子转换为—N3.通过—N3与单壁或复壁碳纳米管反应将超支化聚合物接到碳纳米管的表面上,实现了碳纳米管的化学修饰.通过FTIR,XPS,TEM和Ram an光谱等证明PCMS是以共价键形式结合到碳纳米管表面上的.利用TGA估算出碳纳米管表面的修饰密度,证明用超支化结构大量的端基可反应的官能团可以改善聚合物对碳纳米管的修饰效果.
Hyperbranched poly （p-chloromethyl stryrene）（PCMS） was prepared by combining atom transfer radical polymerization（ATRP） and self-condensing vinyl polymerization（SCVP）. The branches of the hyperbranched PCMS was ended with halogen atoms, which were transferred into azide groups. Then PCMS was connected to the surface of carbon nanotube by the reaction of azide group with single walled carbon nanotube （SWNT） or multi-walled carbon nanotube（MWNT） and the chemical modification of CNT was realized. The results from FTIR, XPS, Raman spectra and TEM show that PCMS was combined with carbon nanotube by the covalent bond. According to the results of TGA mensuration, the modification density was calculated and it can be confirmed that massive functional groups from hyperbranched polymer is favorable for improving the effect of modification of carbon nanotubes.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2007年第1期164-168,共5页
Chemical Journal of Chinese Universities
关键词
碳纳米管
超支化
对氯甲基苯乙烯
叠氮
化学修饰
原子转移自由基聚合
Carbon nanotubes
Hyperbranching
Poly （p-chloromethyl stryrene）
Azidization
Chemical modification
Atom transfer radical polymerization
