A Simple Way for Synthesis of Alkyne-Telechelic Poly(methyl methacrylate) via Single Electron Transfer Radical Coupling Reaction

2010 ◽  
Vol 28 (8) ◽  
pp. 1327-1330 ◽  
Author(s):  
Zhongning Zhang ◽  
Qiang Fu ◽  
Junlian Huang
Keyword(s):  
Electron Transfer ◽  
Methyl Methacrylate ◽  
Coupling Reaction ◽  
Single Electron ◽  
Single Electron Transfer ◽  
Poly Methyl Methacrylate ◽  
Radical Coupling ◽  
Radical Coupling Reaction

scholarly journals Copper (0) Mediated Single Electron Transfer-Living Radical Polymerization of Methyl Methacrylate: Functionalized Graphene as a Convenient Tool for Radical Initiator

Polymers ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 874 ◽  
Author(s):  
Adhigan Murali ◽  
Srinivasan Sampath ◽  
Boopathi Appukutti Achuthan ◽  
Mohan Sakar ◽  
Suryanarayanan Chandrasekaran ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Electron Transfer ◽  
Methyl Methacrylate ◽  
Radical Polymerization ◽  
Living Radical Polymerization ◽  
Single Electron ◽  
Single Electron Transfer ◽  
Functionalized Graphene ◽  
Radical Initiator ◽  
Vis Spectroscopy

Polymer nanocomposites have been synthesized by the covalent addition of bromide-functionalized graphene (Graphene-Br) through the single electron transfer-living radical polymerization technique (SET-LRP). Graphite functionalized with bromide for the first time via an efficient route using mild reagents has been designed to develop a graphene based radical initiator. The efficiency of sacrificial initiator (ethyl α-bromoisobutyrate) has also been compared with a graphene based initiator towards monitoring their Cu(0) mediated controlled molecular weight and morphological structures through mass spectroscopy (MOLDI-TOF) and field emission scanning electron microscopy (FE-SEM) analysis, respectively. The enhancement in thermal stability is observed for graphene-grafted-poly(methyl methacrylate) (G-g-PMMA) at 392 °C, which may be due to the influence ofthe covalent addition of graphene, whereas the sacrificial initiator used to synthesize G-graft-PMMA (S) has low thermal stability as analyzed by TGA. A significant difference is noticed on their glass transition and melting temperatures by DSC. The controlled formation and structural features of the polymer-functionalized-graphene is characterized by Raman, FT-IR, UV-Vis spectroscopy, NMR, and zeta potential measurements. The wettability measurements of the novel G-graft-PMMA on leather surface were found to be better in hydrophobic nature with a water contact angle of 109 ± 1°.

Improved Procedure for Single-electron-transfer-induced Grignard Cross-coupling Reaction

2014 ◽  
Vol 43 (6) ◽  
pp. 922-924 ◽  
Author(s):  
Eiji Shirakawa ◽  
Keisho Okura ◽  
Nanase Uchiyama ◽  
Takuya Murakami ◽  
Tamio Hayashi
Keyword(s):  
Electron Transfer ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Single Electron ◽  
Single Electron Transfer ◽  
Cross Coupling Reaction
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