以芘丁酸为原料通过酯化反应制备了含芘丁单元的苯乙烯基单体,再利用原子转移自由基聚合法（ATRP）合成了分子量可控的嵌段聚合物PS-b-PAH,采用凝胶渗透色谱（GPC）、核磁共振（1H-NMR）等测试手段对产物进行了表征。采用聚合物对碳纳米管表面修饰,比较了聚苯乙烯PS和嵌段聚合物PS-b-PAH修饰碳纳米管后在THF溶剂中的分散情况。结果表明,PS和嵌段聚合物修饰碳纳米管可提高碳管在THF的分散性,PS和嵌段聚合物PS-b-PAH修饰后碳管在THF中的溶解性分别为0.28 g/L,0.332 g/L。
The pyrene monomer was synthesized with 1-pyrenebutyric acid and 4-vinylbenzyl chloride by esterification for atom transfer radical to synthesize block polymer of polystyrene（PS）-block-poly cyclic aromatic hydrocarbon（PAH）.The structure of the products was characterized by gel permeation chrommatograph（GPC） and nuclear magnetic resonance（1H-NMR）.The result of 1H-NMR shows that the block polymer of PS-b-PAH is formed by atom transfer radical polymerization（ATRP）,due to new shift of PAH units is found at 7.3～8.2.The polymerization of block polymer of PS-b-PAH was run by ATRP for 3 h,6 h respectively,the polydispersity Index is 1.2,1.36.And the polymers of PS and PS-b-PAH were used to modify the surface of carbon nanotubes via noncovalent approaches.The solubility and dispersion of MWNTs in solvent of tetrahydrofuran（THF） enhanced after modification with PS and PS-b-PAH,the solubility of the MWNTs modified with PS-b-PAH and PS in THF is 0.32 g/L,0.28 g/L respectively.
参考文献
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