Visible-light-induced controlled radical polymerization of methacrylates mediated by a pillared-layer metal–organic framework

2016 ◽  
Vol 18 (6) ◽  
pp. 1475-1481 ◽  
Author(s):  
Yue Liu ◽  
Dashu Chen ◽  
Xingyu Li ◽  
Ziyang Yu ◽  
Qiansu Xia ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Visible Light ◽  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Molecular Weight Distribution ◽  
Weight Distribution ◽  
Metal Organic Framework ◽  
Controlled Radical Polymerization ◽  
Narrow Molecular Weight Distribution ◽  
Metal Organic

A visible light responsive MOF material has been constructed by the pillared-layer approach to conduct atom transfer radical polymerization. The as-prepared polymers show narrow molecular weight distribution and high retention of chain-end activity.

Reverse Atom Transfer Radical Polymerization of N-Vinylpyrrolidone in Bulk Catalyzed by AIBN)/FeCl3/ PPh3

2013 ◽  
Vol 295-298 ◽  
pp. 3-7
Author(s):  
Guo Bin Yi ◽  
Ying Wu ◽  
Ping Ke Ai
Keyword(s):  
Molecular Weight ◽  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Molecular Weight Distribution ◽  
Weight Distribution ◽  
Gel Permeation Chromatography ◽  
Monomer Conversion ◽  
13C Nmr Spectroscopy ◽  
Atom Transfer ◽  
First Order Kinetics

The reverse atom transfer radical polymerization (RATRP) of N-vinylpyrrolidone (NVP) using azobisisobutyronitrile (AIBN)/FeCl3/triphenylphosphine(PPh3) as the initiating system, was successfully carried out in bulk at 80°C. Plots of In ([M]0/[M]) vs time and molecular weight evolution vs monomer conversion presented a linear dependence and the polymerization was proved to accord with the first-order kinetics. After 10 hours’ reaction, the monomer conversion was up to 84%. Gel permeation chromatography (GPC) was used in testing the molecular weight of polymer and molecular weight distribution, the results showed that polymer molecular weight distribution was as low as 1.018 (Mn=3288 g/mol). Moreover, the resultant polymer was characterized by 1H-NMR, 13C-NMR spectroscopy and Pyrolysis GC-MS, and the results showed that the polymerization mechanism is consistent with RATRP.

Thermally driven directional free-radical polymerization in confined channels

2019 ◽  
Vol 10 (8) ◽  
pp. 920-925
Author(s):  
Preeta Datta ◽  
Kirill Efimenko ◽  
Jan Genzer
Keyword(s):  
Molecular Weight ◽  
Free Radical ◽  
Radical Polymerization ◽  
Molecular Weight Distribution ◽  
Weight Distribution ◽  
Free Radical Polymerization ◽  
Narrow Molecular Weight Distribution ◽  
Thermally Driven ◽  
Poly Acrylamide

We report on the formation of poly(acrylamide) (PAAm) with a relatively-narrow molecular weight distribution (MWD) by means of thermally-driven directional free-radical polymerization carried out in polymerization chambers featuring two parallel glass walls separated by various distances, ranging from sub-millimeter to a few millimeters.

Tuning dispersity of linear polymers and polymeric brushes grown from nanoparticles by atom transfer radical polymerization

2021 ◽  
Author(s):  
Rongguan Yin ◽  
Zongyu Wang ◽  
Michael R. Bockstaller ◽  
Krzysztof Matyjaszewski
Keyword(s):  
Molecular Weight ◽  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Molecular Weight Distribution ◽  
Weight Distribution ◽  
Polymeric Materials ◽  
Structural Behavior ◽  
Atom Transfer ◽  
Linear Polymers ◽  
Considerable Influence

Molecular weight distribution imposes considerable influence on the properties of polymers, making it an important parameter, impacting morphology and structural behavior of polymeric materials.

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