摘要
利用原子转移自由基聚合方法合成了端基具有一个卤素的聚苯乙烯,并通过叠氮化反应得到端基为叠氮基团的聚苯乙烯.利用叠氮基与单壁或复壁碳纳米管的反应,将聚苯乙烯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,UV和Ram an光谱等技术证明了聚苯乙烯以共价键形式结合到碳纳米管表面上.利用TGA估算出连接在碳纳米管上的聚苯乙烯的含量,并推测出复壁碳纳米管中较多的结构缺陷更有利于聚合物的接枝.
Polystyrene with a halogen atom at the chain end was prepared by means of atom transfer radical polymerization（ATRP）. Then polystyrene with an azide group at the chain end was obtained through the azidization reaction. Finally, PSt 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 characterizing results of FTIR, XPS, UV, Raman spectrum and TEM show that the PSt was combined assuredly with carbon nanotube by the covalent bond. According to the results of TGA mensuration, the content of PSt on the surface of SWNT and MWNT is respectively estimated and more defects in structure of MWNT are favorable for chemical modification of CNTs.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2006年第6期1157-1161,共5页
Chemical Journal of Chinese Universities
关键词
碳纳米管
聚苯乙烯
化学修饰
叠氮化
原子转移自由基聚合
Carbon nanotube
Polystyrene
Chemical modification
Azidization
Atom transfer radical poly- merization （ATRP）
