Synthesis and characterization of novel polysiloxane based ABA-type triblock copolymers using ATRP

e-Polymers ◽  
2013 ◽  
Vol 13 (1) ◽  
Author(s):  
Rajan B. Bodkhe ◽  
Dean C. Webster
Keyword(s):  
Radical Polymerization ◽  
Secondary Amine ◽  
Ring Opening ◽  
Triblock Copolymers ◽  
Gel Permeation Chromatography ◽  
Controlled Radical Polymerization ◽  
Synthesis And Characterization ◽  
Unique Material ◽  
Gel Permeation

Abstract Novel polysiloxane based ABA-type triblock copolymers having a secondary amine at the junction point were synthesized using a combination of ring opening equilibration polymerization (ROEP), Michael addition and atom transfer radical polymerization (ATRP). Polysiloxane based bifunctional ATRP macroinitiators were synthesized and subsequently used for controlled radical polymerization of t-butyl acrylate (t-BA) and sulfobetaine methacrylate (SBMA). Gel permeation chromatography (GPC) analysis of the triblocks based on t-BA showed high chain end functionality, due to the disappearance of peaks related to the macroinitiator. ROEP can be used to control the block length of the polysiloxane while ATRP can be used to control the chain length of the outer blocks, making the ABA- type triblock a unique material with secondary amine functionality which can be used for further reaction.

scholarly journals β-Myrcene/isobornyl methacrylate SG1 nitroxide-mediated controlled radical polymerization: synthesis and characterization of gradient, diblock and triblock copolymers

RSC Advances ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 3377-3395 ◽  
Author(s):  
Adrien Métafiot ◽  
Lysandre Gagnon ◽  
Sébastien Pruvost ◽  
Pascal Hubert ◽  
Jean-François Gérard ◽  
...  
Keyword(s):  
Radical Polymerization ◽  
Raw Materials ◽  
Triblock Copolymers ◽  
Controlled Radical Polymerization ◽  
Synthesis And Characterization ◽  
Nitroxide Mediated Polymerization

β-Myrcene (My), a natural 1,3-diene, and isobornyl methacrylate (IBOMA), from partially bio-based raw materials sources, were copolymerized by nitroxide-mediated polymerization (NMP) in bulk.

Synthesis and characterization of amphiphilic triblock Copolymers with Identical compositions but different block sequences

RSC Advances ◽  
2014 ◽  
Vol 4 (82) ◽  
pp. 43682-43690 ◽  
Author(s):  
Chengjiao Lu ◽  
Lingdi Chen ◽  
Kun Huang ◽  
Guowei Wang
Keyword(s):  
Atom Transfer Radical Polymerization ◽  
Click Chemistry ◽  
Radical Polymerization ◽  
Triblock Copolymers ◽  
Coupling Reaction ◽  
Nitroxide Radical ◽  
Synthesis And Characterization ◽  
Radical Coupling ◽  
Radical Coupling Reaction

The amphiphilic triblock copolymers PAA-b-PS-b-PAA and PS-b-PAA-b-PS were synthesized by a combination of an atom transfer radical polymerization mechanism and a nitroxide radical coupling reaction or copper-catalyzed azide/alkyne click chemistry.

Synthesis and characterization of novel organosoluble aromatic copolyimides

e-Polymers ◽  
2005 ◽  
Vol 5 (1) ◽  
Author(s):  
Jintian Yang ◽  
Wei Huang ◽  
Yongfeng Zhou ◽  
Deyue Yan ◽  
Xiaohang Wang
Keyword(s):  
Gel Permeation Chromatography ◽  
Polymer Chains ◽  
Polymerization Process ◽  
Synthesis And Characterization ◽  
Aprotic Solvents ◽  
Solution Casting ◽  
Molecular Weights ◽  
Gel Permeation ◽  
Dipolar Aprotic Solvents

AbstractA series of novel aromatic copolyimides was synthesized from pyromellitic dianhydride with the commercial diamine 4,4’-methylenebisaniline (MBA) and the diamine 4,4’-methylenebis(2-tert-butylaniline) (MBTBA) specially designed by ourselves. The solubility of the copolyimides in conventional solvents decreased with the mole ratio of MBTBA to MBA. When MBTBA/MBA was larger than 8/2, the copolyimides are soluble in low boiling point solvents (such as chloroform and tetrahydrofuran) and can form a transparent, flexible, tough film by solution casting. When MBTBA/MBA was between 7/3 and 5/5, the copolyimides are only soluble in dipolar aprotic solvents (such as dimethylformamide and N-methyl-2-pyrrolidone) and form films, too. The copolyimide was precipitated in m-cresol in the polymerization process when MBTBA/MBA was lower than 5/5. The number-average molecular weights of the soluble copolyimides measured by gel permeation chromatography were larger than 5.0·104 and the polydispersity index was higher than 1.5. Only one glass transition of these copolyimides was detected at around 350°C. The copolyimides did not show appreciable decomposition up to 400°C under air and 550°C under nitrogen, and their thermal stability increased a little with the introduction of MBA into the polymer chains.

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