期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
酶促聚合和原子转移自由基聚合“一锅法”合成嵌段聚合物及其性能表征 被引量:2
1
作者 撒宗朋 刘彦晶 +3 位作者 李亚鹏 祝明 李玉祥 王静媛 《高等学校化学学报》 SCIE EI CAS CSCD 北大核心 2013年第7期1770-1775,共6页
用酶促聚合和原子转移自由基聚合相结合的'一锅法'合成了聚甲基丙烯酸正丁酯嵌段聚10-羟基癸酸[PBMA-b-P(10-HD)],通过核磁共振(1H NMR)、傅里叶红外光谱(FTIR)和凝胶渗透色谱(GPC)对其结构以及分子量与其分子量分布进行了表征... 用酶促聚合和原子转移自由基聚合相结合的'一锅法'合成了聚甲基丙烯酸正丁酯嵌段聚10-羟基癸酸[PBMA-b-P(10-HD)],通过核磁共振(1H NMR)、傅里叶红外光谱(FTIR)和凝胶渗透色谱(GPC)对其结构以及分子量与其分子量分布进行了表征,并通过动态光散射仪(DLS)和原子力显微镜(AFM)对聚合物在水溶液中的性质进行了研究.所得嵌段聚合物纳米粒子呈球形结构,平均直径为135 nm左右. 展开更多
关键词 一锅法 酶促自缩聚 原子转移自由基聚合 双嵌段聚合物
下载PDF
Preparation of poly(N-isopropylacrylamide) brush grafted silica particles via surface-initiated atom transfer radical polymerization used for aqueous chromatography 被引量:2
2
作者 Zong-Jian LIU Yan-Li LIANG +4 位作者 Fang-Fang GENG Fang LV Rong-Ji DAI Yu-Kui ZHANG Yu-Lin DENG 《Frontiers of Materials Science》 SCIE CSCD 2012年第1期60-68,共9页
Thermoresponsive poly(N-isopropylacrylamide) (PNIPAAm) brushes were densely grafted onto silica surface via surface-initiated atom transfer radical polymeriza- tion (SI-ATRP). The grafting reaction started from ... Thermoresponsive poly(N-isopropylacrylamide) (PNIPAAm) brushes were densely grafted onto silica surface via surface-initiated atom transfer radical polymeriza- tion (SI-ATRP). The grafting reaction started from the surfaces of 2-bromoisobutyrate- functionalized silica particles in 2-propanol aqueous solution at ambient temperature using CuCIICuCI21N, N,N',N',N”.pentamethyldiethylenetriamine (PMDETA) as the catalytic system. Based on thermogravimetric analysis (TGA) results, the grafting amount and grafting density of PNIPAM chains on the surface of silica were calculated to be 1.29 mg/ m^2 and 0.0215 chains/nm^2, respectively. The gel permeation chromatography (GPC) result showed the relatively narrow molecular weight distribution (MwlMn= 1.21) of the grafted PNIPAAm. The modified silica particles were applied as high-performance liquid chromatography (HPLC) packing materials to successfully separate three aromatic compounds using water as mobile phase by changing column temperature. Temperature- dependent hydrophilic/hydrophobic property alteration of PNIPAAm brushes grafted on silica particles was determined with chromatographic interaction between stationary phase and analytes. Retention time was prolonged and resolution was improved with increasing temperature. Baseline separation with high resolution at relatively low temperatures was observed, demonstrating dense PNIPAAm brushes were grafted on silica surfaces. 展开更多
关键词 poly(N-isopropylacrylamide) (PNIPAAm) atom transfer radical polymeriza-tion (atrp temperature-responsive chromatography separation
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部