Synthesis of ω-End Group Functionalized Poly(methyl methacrylate)s via RAFT Polymerization

2010 ◽  
Vol 43 (18) ◽  
pp. 7453-7464 ◽  
Author(s):  
Barbara Sasso ◽  
Martyn Dobinson ◽  
Philip Hodge ◽  
Trevor Wear
Keyword(s):  
Methyl Methacrylate ◽  
Raft Polymerization ◽  
Poly Methyl Methacrylate ◽  
End Group

scholarly journals Introduction of Stilbene Derivatives and Cinnamate Ester Derivatives at the ω-End Groups of Poly(Methyl Methacrylate) Prepared via RAFT Polymerization

Polymers ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 2449
Author(s):  
Martyn Dobinson ◽  
Philip Hodge ◽  
Trevor Wear
Keyword(s):  
Nmr Spectroscopy ◽  
Methyl Methacrylate ◽  
Raft Polymerization ◽  
19F Nmr ◽  
19F Nmr Spectroscopy ◽  
Poly Methyl Methacrylate ◽  
End Groups ◽  
Stilbene Derivatives

The capping of “living” poly(methyl methacrylate) (PMMA) and “living” polystyrene (PS), both prepared by the RAFT technique, with various olefins was screened using 19F-NMR spectroscopy. The capping of “living” PMMA with a labeled stilbene was as high as 63% and with certain cinnamate esters was essentially quantitative, but the capping of “living” polystyrene with all the olefins investigated was generally poor.

End-Group Analysis of Poly(methyl methacrylate) Prepared with Benzoyl Peroxide by 750 MHz High-Resolution1H NMR Spectroscopy

1997 ◽  
Vol 30 (22) ◽  
pp. 6754-6759 ◽  
Author(s):  
Koichi Hatada ◽  
Tatsuki Kitayama ◽  
Koichi Ute ◽  
Yoshio Terawaki ◽  
Takatsune Yanagida
Keyword(s):  
Nmr Spectroscopy ◽  
Methyl Methacrylate ◽  
Benzoyl Peroxide ◽  
Group Analysis ◽  
Poly Methyl Methacrylate ◽  
End Group

A Potential New RAFT - Click Reaction or a Cautionary Note on the Use of Diazomethane to Methylate RAFT-synthesized Polymers

2011 ◽  
Vol 64 (4) ◽  
pp. 433 ◽  
Author(s):  
Ming Chen ◽  
Graeme Moad ◽  
Ezio Rizzardo
Keyword(s):  
Molecular Weight ◽  
Methyl Methacrylate ◽  
Room Temperature ◽  
Click Reaction ◽  
Raft Polymerization ◽  
Dipolar Cycloaddition ◽  
Low Molecular Weight ◽  
Similar Reaction ◽  
Poly Methyl Methacrylate ◽  
End Groups

It has been found that diazomethane undergoes a facile 1,3‐dipolar cycloaddition with both dithiobenzoate RAFT agents and the dithiobenzoate end‐groups of polymers formed by RAFT polymerization. Thus, 2‐cyanoprop‐2‐yl dithiobenzoate on treatment with diazomethane at room temperature provided a mixture of stereoisomeric 1,3‐dithiolanes in near quantitative (>95%) yield. A low‐molecular‐weight RAFT‐synthesized poly(methyl methacrylate) with dithiobenzoate end‐groups underwent similar reaction as indicated by immediate decolourization and a quantitative doubling of molecular weight. Higher‐molecular‐weight poly(methyl methacrylate)s were also rapidly decolourized by diazomethane and provided a product with a bimodal molecular weight distribution. Under similar conditions, the trithiocarbonate group does not react with diazomethane.

Matrix-grafted multiwalled carbon nanotubes/poly(methyl methacrylate) nanocomposites synthesized by in situ RAFT polymerization: A kinetic study

2012 ◽  
Vol 44 (8) ◽  
pp. 555-569 ◽  
Author(s):  
Saeid Rahimi-Razin ◽  
Vahid Haddadi-Asl ◽  
Mehdi Salami-Kalajahi ◽  
Farid Behboodi-Sadabad ◽  
Hossein Roghani-Mamaqani
Keyword(s):  
Carbon Nanotubes ◽  
Methyl Methacrylate ◽  
Kinetic Study ◽  
Multiwalled Carbon Nanotubes ◽  
Raft Polymerization ◽  
Multiwalled Carbon ◽  
Poly Methyl Methacrylate

Thermo-responsive Poly(methyl methacrylate)-block-poly(N-isopropylacrylamide) Block Copolymers Synthesized by RAFT Polymerization: Micellization and Gelation

2006 ◽  
Vol 207 (19) ◽  
pp. 1718-1726 ◽  
Author(s):  
Tian Tang ◽  
Valeria Castelletto ◽  
Petros Parras ◽  
Ian W. Hamley ◽  
Stephen M. King ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Methyl Methacrylate ◽  
Raft Polymerization ◽  
Poly Methyl Methacrylate

scholarly journals Thermolysis of RAFT-Synthesized Poly(Methyl Methacrylate)

2006 ◽  
Vol 59 (10) ◽  
pp. 755 ◽  
Author(s):  
Bill Chong ◽  
Graeme Moad ◽  
Ezio Rizzardo ◽  
Melissa Skidmore ◽  
San H. Thang
Keyword(s):  
Weight Loss ◽  
Methyl Methacrylate ◽  
1H Nmr Spectroscopy ◽  
Gel Permeation Chromatography ◽  
Dominant Mechanism ◽  
Elimination Process ◽  
Poly Methyl Methacrylate ◽  
Gel Permeation ◽  
Raft Agent ◽  
End Group

Thermolysis provides a simple and efficient way of eliminating thiocarbonylthio groups from RAFT-synthesized polymers. The course of thermolysis of poly(methyl methacrylate) (PMMA) prepared with dithiobenzoate and trithiocarbonate RAFT agents was followed by thermogravimetric analysis (TGA), 1H NMR spectroscopy, and gel permeation chromatography (GPC). The weight loss profile observed depends strongly on the RAFT agent used during polymer synthesis. PMMA with a methyl trithiocarbonate end group undergoes loss of that end group at ~180°C, at least in part, by a mechanism believed to involve homolysis of the C–CS2SCH3 bond and subsequent depropagation. In contrast, PMMA with a dithiobenzoate end appears more stable. Only the end group is lost at ~180°C and the dominant mechanism is proposed to be a concerted elimination process analogous to that involved in the Chugaev reaction.

Sign in / Sign up

Export Citation Format

Share Document