Effect of catalyst on formation of poly(methyl methacrylate) brushes by surface initiated atom transfer radical polymerization
来源期刊：中南大学学报(英文版)2014年第8期
论文作者：刘辉 ZHOU Wan-zhu(周晚珠) YE Hong-qi(叶红齐) HAN Kai(韩凯) HOU Shi-chuan(侯世川) ZHANG Xin-yue(张欣悦)
文章页码：3049 - 3056
Key words：poly (methyl methacrylate); atom transfer radical polymerization; silicon wafer; catalyst
Abstract: Poly (methyl methacrylate) (PMMA) brushes were synthesized from silicon wafers via surface initiated atom transfer radical polymerization (SI-ATRP). Energy disperse spectroscopy (EDS) and atomic force microscopy (AFM) confirmed that PMMA brushes were successfully prepared on the silicon wafers, and the surface became more hydrophobic according to the contact angle of 69°. It is found that CuCl/1, 1, 4, 7, 10, 10-hexamethyl triethylenetetramine (HMTETA) system is more suitable than CuBr/N, N, N′, N″, N″ -pentamethyl diethylenetriamine (PMDETA) system to control the free radical polymerization of MMA in solution. Nevertheless, better control on the thickness of PMMA brushes was achieved in CuBr/PMDETA than in CuCl/HMTETA due to higher activity and better reversibility of the former system.
LIU Hui(刘辉)1, 2, 3, ZHOU Wan-zhu(周晚珠)1, 2, YE Hong-qi(叶红齐)1, HAN Kai(韩凯)1, HOU Shi-chuan(侯世川)1, ZHANG Xin-yue(张欣悦)1
(1. College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China;
2. Key Laboratory of Resource Chemistry of Nonferrous Metals of Ministry of Education,
(Central South University), Changsha 410083, China;
3. State Key Laboratory for Powder Metallurgy (Central South University), Changsha 410083, China)
Abstract:Poly (methyl methacrylate) (PMMA) brushes were synthesized from silicon wafers via surface initiated atom transfer radical polymerization (SI-ATRP). Energy disperse spectroscopy (EDS) and atomic force microscopy (AFM) confirmed that PMMA brushes were successfully prepared on the silicon wafers, and the surface became more hydrophobic according to the contact angle of 69°. It is found that CuCl/1, 1, 4, 7, 10, 10-hexamethyl triethylenetetramine (HMTETA) system is more suitable than CuBr/N, N, N′, N″, N″ -pentamethyl diethylenetriamine (PMDETA) system to control the free radical polymerization of MMA in solution. Nevertheless, better control on the thickness of PMMA brushes was achieved in CuBr/PMDETA than in CuCl/HMTETA due to higher activity and better reversibility of the former system.
Key words:poly (methyl methacrylate); atom transfer radical polymerization; silicon wafer; catalyst
