将偶联剂γ-氨丙基三甲氧基硅烷(AMPs)键合在硅胶微粒表面,得到改性微粒AMPs-SiO2;使改性微粒表面的氨基与溶液中的过硫酸铵构成氧化-还原引发体系,实现了甲基丙烯酸(MAA)在硅胶微粒的表面引发接枝聚合,制得了高接枝度(0.30 g/g)的接枝微粒SiO2-gPMAA;研究了影响表而引发接枝聚合的主要因素.结果表明,适宜的温度为40℃.已接枝到硅胶表面的聚合物层对后续的接枝聚合产生阻隔作用.适宜的引发剂用量为单体质量的1.1%,适宜的单体质量分数为5%左右.
参考文献
| [1] | Rcvillon A,Leroux D.Functional Silica Supported Polymer V‘Onto'Versus‘From'Grafting Processes[J].React Funct Polym,1995,26:105-118. |
| [2] | Espiard Ph,Guyot A.Poly(ethyl acrylate)Latexes Encapsulating Nanoparticles of Silica:2.Grafting Process onto Silica[J].Polymer,1995,36:4391-4395. |
| [3] | Chaimbergt M,Cohen Y.Free-Radical Graft Polymerization of Vinylpyrrolidone onto Silica[J].Ind Eng Chem Res,1991,30:2534-2542. |
| [4] | Voronov A,Shafranska O.Dependence of Thin Polystyrene Films Stability on the Thickness of Grafted Polystyrene Brushes[J].Polymer,2003,44:277-281. |
| [5] | Ueda J,Sato S,Tsunokawa A,et al.Scale-up Synthesis of Vinyl Polymer-Grafted Nano-Sized Silica by Radical Polymerization of Vinyl Monomers Initiated by Surface Initiating Groups in the Solvent-free Dry-system[J].Eur Potym.J,2005,41:193-200. |
| [6] | Wang H J,Peng M,Zheng J,et al.Encapsulation of Silica Nanoparticles by Redox-initiated Graft Polymerization from the Surface of Silica Nanopartieles[J].J Colloid Interface Sci,2008,326:151-157. |
| [7] | Munro N H,Hanton L R,Moratti S C,et al.Synthesis and Characterisation of Chitosan-graft-poly(OEGMA)Copolymers Pepared by ATRP[J].Carbohydrate Polym,2009,77:496-505. |
| [8] | Parnell A J,Martin S,Dang C C,et al.Synthesis,Characterization and Swelling Behaviour of Poly(methacrylic acid) Brushes Synthesized using Atom Transfer Radical Polymerization[J].Polymer,2009,50:1005-1014. |
| [9] | WANG Jian,GAO Baojiao.Preparation and Characterization of Micron-sized Grafting Particles PMAA/SiO2[J].Chinese J Appl Chem,2008,25(5):573-577(in Chinese).汪剑,高保娇.微米级接枝微粒PMAA/SiO2的制备与表征[J].应用化学,2008,25(5):573-577. |
| [10] | Bialk M,Prucker O,Ruhe J.Grafting of Polymem to Solid Surfaces by Using Immobilized Methacrylates[J].Colloids Surf A:Physicochem Eng Aspects,2002,198/200:543-549. |
| [11] | Tsubokawa N,Hayashi S,Nishimura J.Grafting of Hyperbranched Polymers onto Ultrafine Silica:Pestgraft Polymerization of Vinyl Monomers Initiated by Pendant Azo Groups of Grafted Polymer Chains on the Surface[J].Prog Org Coating,2002,44:69-74. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%