Stereochemistry of living poly(methyl methacrylate) anions as determined by carbon-13 NMR analysis of carbon-13-labeled methyl end groups

1992 ◽  
Vol 25 (13) ◽  
pp. 3553-3560 ◽  
Author(s):  
Raymond Volpe ◽  
Thieo E. Hogen-Esch ◽  
Friedhelm Gores ◽  
Axel H. E. Mueller
Keyword(s):  
Methyl Methacrylate ◽  
Nmr Analysis ◽  
Poly Methyl Methacrylate ◽  
End Groups

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.

scholarly journals Synthesis and post-polymerization reaction of end-clickable stereoregular polymethacrylates via termination of stereospecific living anionic polymerization

2015 ◽  
Vol 6 (7) ◽  
pp. 1078-1087 ◽  
Author(s):  
Yasuhiro Kohsaka ◽  
Takashi Kurata ◽  
Kazuki Yamamoto ◽  
Shoya Ishihara ◽  
Tatsuki Kitayama
Keyword(s):  
Methyl Methacrylate ◽  
Anionic Polymerization ◽  
Polymerization Reaction ◽  
Living Anionic Polymerization ◽  
Poly Methyl Methacrylate ◽  
End Groups

Poly(methyl methacrylate)s with high stereoregularity and clickable end-groups were synthesized via terminating reactions with α-(halomethyl)acrylates in stereospecific living anionic polymerization.

Characterization of Branched Alkyl End Groups of Poly(methyl methacrylate) by Pyrolysis−Gas Chromatography

1996 ◽  
Vol 29 (13) ◽  
pp. 4516-4519 ◽  
Author(s):  
Yoshiro Ito ◽  
Shin Tsuge ◽  
Hajime Ohtani ◽  
Shigeo Wakabayashi ◽  
Jun-ichiro Atarashi ◽  
...  
Keyword(s):  
Gas Chromatography ◽  
Methyl Methacrylate ◽  
Pyrolysis Gas ◽  
Poly Methyl Methacrylate ◽  
Pyrolysis Gas Chromatography ◽  
End Groups

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.

End-groups in poly(methyl methacrylate) prepared using aroyl peroxides in the presence of 4-hydroxystilbene

1993 ◽  
Vol 29 (4) ◽  
pp. 513-515 ◽  
Author(s):  
C.A. Barson ◽  
J.C. Bevington ◽  
T.N. Huckerby ◽  
B.J. Hunt
Keyword(s):  
Methyl Methacrylate ◽  
Poly Methyl Methacrylate ◽  
End Groups
Sign in / Sign up

Export Citation Format

Share Document