Grafting poly (methyl methacrylate) from azo-functionalized graphene nanolayers via reverse atom transfer radical polymerization

被引：0
作者：
Hossein Roghani-Mamaqani
Vahid Haddadi-Asl
Zahra Sobhkhiz
Maedeh Ghaderi-Ghahfarrokhi
机构：
[1] Sahand University of Technology,Department of Polymer Engineering
[2] Amirkabir University of Technology,Department of Polymer Engineering and Color Technology
[3] University of Tehran,School of Chemistry, University College of Science
来源：
Colloid and Polymer Science | 2015年 / 293卷
关键词：
Poly (methyl methacrylate); Graphene; Reverse atom transfer radical polymerization; Grafting from; Azo-functionalization;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Graphene oxide (GO) was functionalized with (3-aminopropyl)triethoxysilane (APTES) from hydroxyl groups. Subsequently, 4,4′-azobis(4-cyanopentanoic acid) (ACPA) was attached to the APTES-functionalized GO to yield azo-anchored graphene (GOAzo). Then, grafting from reverse atom transfer radical polymerization of methyl methacrylate in the presence of GOAzo in different weight percents was carried out. The grafting ratio of APTES and ACPA was calculated to be 41 and 26 % via the data of N content from elemental analysis. Successful functionalization of GO with APTES, ACPA, and poly(methyl methacrylate) (PMMA) was also proved by XPS and FTIR. SEC results show that molecular weight and PDI values of the attached chains are higher. Expansion of graphene interlayer spacing and crystal structure of carbon in different graphenes were evaluated by XRD and Raman spectroscopy, respectively. Graft density of modifier and PMMA in various graphenes was evaluated by TGA. Finally, morphology of graphene nanolayers was studied by scanning and transmission electron microscopies.
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页码：735 / 750
页数：15
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