论文部分内容阅读
利用原子转移自由基聚合(ATRP)方法,分别在三氟甲苯、含氟离子液体以及三氟甲苯/含氟离子液体混合溶剂体系中合成了聚苯乙烯-co-聚(2,3,4,5,6-五氟苯乙烯)(PS-co-PPFS)共聚物,通过1H NMR、19F NMR、元素分析以及凝胶渗透色谱法(GPC)对所得聚合物的分子链结构和组成进行了分析和表征.随后,利用静态呼吸图法分别在CS2,CHCl3和CH2Cl2中制备了有序多孔薄膜,用扫描电子显微镜(SEM)观察其表面形貌,并与利用分子量大小相当的聚苯乙烯均聚物(PS)制备的多孔薄膜进行了对比.研究结果表明:在三氟甲苯和含氟离子液体溶剂体系中,均可利用ATRP聚合方法获得窄分子量分布的PS-co-PPFS共聚物(Mn=5200～7900 g mol-1,Mw/Mn=1.12～1.22).对聚合物薄膜的扫描电子显微镜(SEM)观察和分析显示:分别以CS2,CHCl3和CH2Cl2作为溶剂,利用静态呼吸图法均可制备出PS-co-PPFS共聚物多孔薄膜.然而,与在CHCl3和CH2Cl2中制备的PS均聚物多孔薄膜的表面形貌不同的是,PS-co-PPFS共聚物多孔薄膜呈现出无序排列、平均孔径大小不同的两种孔结构;在CHCl3中制备所得薄膜的孔结构有序性相对较好,两种孔的平均孔径分别为0.75和0.37μm.
Polystyrene-co-poly (2, 3, 4, 5-hexafluoropropane) was synthesized by atom transfer radical polymerization (ATRP) in trifluoro-toluene, fluorinated ionic liquids and trifluoro-toluene / Pentafluorostyrene) (PS-co-PPFS) copolymer, the molecular chain structure and composition of the obtained polymer were analyzed by 1H NMR, 19F NMR, elemental analysis and gel permeation chromatography (GPC) Then, the ordered porous films were prepared by static respirometry in CS2, CHCl3 and CH2Cl2 respectively. The surface morphology of the films was observed by scanning electron microscopy (SEM) (PS) were compared.The results show that PS-co-PPFS copolymer with narrow molecular weight distribution can be obtained by ATRP polymerization in toluene and fluorine-containing ionic liquid solvent system (Mn = 5200 ~ 7900 g mol-1, Mw / Mn = 1.12 ~ 1.22). The scanning electron microscopy (SEM) observation and analysis of the polymer films showed that using the static gas chromatogram of CS2, CHCl3 and CH2Cl2 respectively, PS-co-PPFS copolymer porous films were prepared, however, in CHCl3 and CH2Cl2 Prepared PS homopolymer porous film surface morphology is different, PS-co-PPFS copolymer porous film showing a disordered arrangement, the average pore size of two different pore structure; prepared in CHCl3 the resulting film pore structure The orderliness is relatively good. The average pore sizes of the two wells are 0.75 and 0.37 μm, respectively.