Chain Transfer and Efficiency of End-Group Introduction in Free Radical Polymerization of Methyl Methacrylate in the Presence of Poly(methyl methacrylate) Macromonomer

2004 ◽  
Vol 25 (22) ◽  
pp. 1905-1911 ◽  
Author(s):  
Kazuki Miyake ◽  
Per B. Zetterlund ◽  
Bunichiro Yamada
Keyword(s):  
Free Radical ◽  
Methyl Methacrylate ◽  
Radical Polymerization ◽  
Chain Transfer ◽  
Free Radical Polymerization ◽  
Poly Methyl Methacrylate ◽  
End Group

scholarly journals Methylenelactide: vinyl polymerization and spatial reactivity effects

2016 ◽  
Vol 12 ◽  
pp. 2378-2389 ◽  
Author(s):  
Judita Britner ◽  
Helmut Ritter
Keyword(s):  
Free Radical ◽  
Methyl Methacrylate ◽  
Radical Polymerization ◽  
Chain Transfer ◽  
Free Radical Polymerization ◽  
Controlled Radical Polymerization ◽  
Experimental Results ◽  
Cyclic Monomer ◽  
Vinyl Polymerization ◽  
Reversible Addition

The first detailed study on free-radical polymerization, copolymerization and controlled radical polymerization of the cyclic push–pull-type monomer methylenelactide in comparison to the non-cyclic monomer α-acetoxyacrylate is described. The experimental results revealed that methylenelactide undergoes a self-initiated polymerization. The copolymerization parameters of methylenelactide and styrene as well as methyl methacrylate were determined. To predict the copolymerization behavior with other classes of monomers, Q and e values were calculated. Further, reversible addition fragmentation chain transfer (RAFT)-controlled homopolymerization of methylenelactide and copolymerization with N,N-dimethylacrylamide was performed at 70 °C in 1,4-dioxane using AIBN as initiator and 2-(((ethylthio)carbonothioyl)thio)-2-methylpropanoic acid as a transfer agent.

Tacticity of Poly(Methyl Methacrylate). Evidence for a Penpenultimate Group Effect in Free-Radical Polymerization

1986 ◽  
Vol 39 (1) ◽  
pp. 43 ◽  
Author(s):  
G Moad ◽  
DH Solomon ◽  
TH Spurling ◽  
SR Johns ◽  
RI Willing
Keyword(s):  
Free Radical ◽  
Methyl Methacrylate ◽  
Radical Polymerization ◽  
Free Radical Polymerization ◽  
Group Effect ◽  
Poly Methyl Methacrylate

The tacticity of poly(methyl methacrylate ) prepared by free-radical polymerization has been determined by analysing the carbonyl region of the 13C n.m.r . spectrum. This analysis demonstrates that the addition of poly(methyl methacrylyl ) radical to methyl methacrylate in benzene at 60°C is subject to a significant penpenultimate unit effect. The probability of forming a meso dyad is some 20% less if the preceding dyad in the chain is also meso . The polymerization (60°C, benzene) is described by the following parameters P(m) = 0.202, P(m|m) = 0.159, P(r | m) = 0.212.

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