Poly group transfer polymerization

The anionic polymerization of methylmethacrylate at room temperature (originally called group transfer polymerization) [75-77] has provided a means for preparing star poly(methylmethacrylate) via the block polymerization with ethyleneglycoldimethacrylate ... 

Aldol group transfer polymerization of ferf-butyldimethylsilyl vinyl ether [62] was initiated by pendant aldehyde functions incorporated along a poly(methyl methacrylate) (PMMA) backbone [63]. This backbone was a random copolymer prepared by group transfer polymerization of methyl methacrylate (MMA) and acetal protected 5-methacryloxy valeraldehyde. After deprotection of the aldehyde initiating group, polymerization proceeded by activation with zinc halide in THF at room temperature. The reaction led to a graft copolymer with PMMA backbone and poly(silyl vinyl ether) or, upon hydrolysis of the ferf-butyldimethylsilyl groups, poly(vinyl alcohol) branches. 

Using this technology, the preparation of the fifth tier, monoaldehyde dendrimer was reported.[102] Subsequently, living poly(methyl methacrylate) (PMMA, prepared by group transfer polymerization) was treated with the site-specific cascades. Polydispersi-ties determined for the copolymer were similar to those recorded for the living polymer when smaller dendrimers were used, whereas the use of larger dendrimers for copolymer formation leads to a dependence of polydispersity on the dendrimer. 

Charleux, B. and Pichot, C. (1993) Styrene-terminated poly(vinyl alcohol) macromonomers. 1. Synthesis by aldol group transfer polymerization. Polymer, 34, 195. 

Relatively controlled group transfer polymerizations are possible when the monomer lacks a phenylbenzoate group (Eq. 14). Poly[6-(4 -methoxy-4"-0 -methylstilbeneoxy)hexyl... 

The G-SmA-N-I transition temperatures of syndiotactic poly(6-[4 -(4"- -bu-toxyphenoxycarbonyl)phenoxyl)phenoxy]-hexyl methacrylate prepared by aluminum porphyrin initiated polymerizations also level off at approximately 25 repeat units [91]. Similarly, the glass and nematic-isotropic transition temperatures of poly[6-(4 -methoxy-4"- Z-methylstilbeneoxy)hexyl methacrylate] prepared by group transfer polymerization become independent of molecular weight at approximately 20 repeat units [48]. Both polymethacrylates reach the same transition temperatures as the corresponding polymers prepared by radical polymerizations, which have nearly identical tacticities. 

TYPES OF POLYMERIZATION Free-radical or ionic polymerization of methacrylonitrile (2-cyanopropylene) in bulk, emulsion, or solution group-transfer polymerization also has been used. Ionic polymerization in inert solvents can produce either amorphous poly(methacrylonitrile) (by use of anionic catalysts such as n-butyllithium) or primarily isotactic poly(methacrylonitrile) (by use of coordination catalysts such as ethylberyllium or diethylmagnesium). 

DHB was used as a matrix to analyze poly(N-N diethylacrylamide) (PDEAA) prepared by group transfer polymerization, and also PDEAA prepared by anionic polymerization. HABA was used in the analysis of a substituted polyacrylamide obtained by free radical polymerization. ... 

Freitag, R., Baltes, T., and Eggert, M., A Comparison of Thermoreactive Water-Soluble Poly-N,N-diethylacrylamide Prepared by Anionic and by Group Transfer Polymerization, /. Polym. Sci Part A- Polym. Chem., 32, 3019,1994. 

Group-transfer polymerizations yield very narrow molecular weight distribution polymers. When mixtures of monomers are used, random copolymers form. The polymerization reaction is very tolerant of other functional groups in the monomer. Thus, for instance, p-vinylbenzyl methacrylate is converted to poly(p-vinylbenzyl methacrylate) without the polymerization of the vinyl... 

Danis, P.O., Karr, D.E., Simonsick, W.J., Jr., and Wu, D.T. (1995) Matrix-assisted laser desorption/ionization time-of-flight characterization of poly(butyl methacrylate) synthesized by group-transfer polymerization. Macromoleades, 28,1229-1232. 

Here so-called Type I and Type II zwitterionic SCK micelles can be prepared from the hydrophilic-hydrophobic precursors poly(2-(dimethylamino)ethyl methacrylate-6Zoc -2-tetrahydropyranyl methacrylate) (DMAEMA-THPMA) copolymers prepared via group transfer polymerization (128,129,461). Micel-lization of the DMAEMA-THPMA block copolymers in a water/THF mixture... 

Verma, A., Nielsen, A., Me Grath, J.E. and Riffle, J.S. (1990) Preparation of ester terminated poly(alkylvinylether) oHgomers and block copolymers using a combination of living cationic and group transfer polymerization. Polym. Bull, 23,563-570. 

Suga T, Yoshimura K, Nishide H (2006) Nitroxide-substituted polyether as a new material for batteries. Macromol Symp 245-246(l) 416-422 75. Lee SH, Kim J-K, Cheruvally G et al (2008) Electrochemical properties of new organic radical materials for lithium secondary battraies. J Power Sources 184(2) 503-507 Bugnon L, Morton CJH, Novak P et al (2007) Synthesis of poly(4-methacryloyloxy-TEMPO) via group-transfer polymerization and its evaluation in organic radical battery. Chem Mater 19(11) 2910-2914... 

Freitag R, Baltus T, Eggert M. A comparison of thermoreactive water-soluble Poly-N,N-diethylacrylamide prepared by anionic and by group transfer polymerization. J Poly Sci 1994 32 3019-3030. 

Eggert M, Freitag R. Poly-N,N-diethylacrylamide prepared by group transfer polymerization synthesis, characterization, and solution properties. J Polym Sci 1994 803-813-... 

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