Synthesis of a well-defined alternating copolymer of 1,1-diphenylethylene and tert-butyldimethylsilyloxymethyl substituted styrene by anionic copolymerization: toward tailored graft copolymers with controlled side chain densities

2019 ◽  
Vol 10 (47) ◽  
pp. 6413-6422 ◽  
Author(s):  
Raita Goseki ◽  
Fan Zhang ◽  
Kazuki Takahata ◽  
Satoshi Uchida ◽  
Takashi Ishizone
Keyword(s):  
Graft Copolymers ◽  
Side Chain ◽  
Alternating Copolymers ◽  
Alternating Copolymer ◽  
Anionic Copolymerization

Well-defined alternating copolymers comprising 1,1-diphenylethylene (DPE) and styrene derivative having sterically bulky tert-butyldimethylsilyloxymethyl group at the meta position (St-TBS) were successfully synthesized.

Photocontrolled iodine-mediated reversible-deactivation radical polymerization with a semifluorinated alternating copolymer as the macroinitiator

2020 ◽  
Vol 11 (47) ◽  
pp. 7497-7505
Author(s):  
Jiannan Cheng ◽  
Kai Tu ◽  
Enjie He ◽  
Jinying Wang ◽  
Lifen Zhang ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Radical Polymerization ◽  
Room Temperature ◽  
Blue Led ◽  
Led Light ◽  
Alternating Copolymers ◽  
Alternating Copolymer ◽  
Reversible Deactivation ◽  
Novel Strategy ◽  
Reversible Deactivation Radical Polymerization

A novel strategy for preparing block copolymers with semifluorinated alternating copolymers as macroinitiators was established by photocontrolled iodine-mediated RDRP under irradiation with blue LED light at room temperature.

Pyridine-based poly(aryleneethynylene)s: a study on anionic side chain density and their influence on optical properties and metallochromicity

RSC Advances ◽  
2015 ◽  
Vol 5 (116) ◽  
pp. 96189-96193 ◽  
Author(s):  
Markus Bender ◽  
Kai Seehafer ◽  
Marlene Findt ◽  
Uwe H. F. Bunz
Keyword(s):  
Optical Properties ◽  
Water Soluble ◽  
Side Chain ◽  
Phenylene Ethynylene ◽  
Alternating Copolymers

We report the Pd-catalyzed synthesis of six new water soluble, alternating poly(p-phenylene-ethynylene-p-pyridinylene-ethynylene) (abcb-alternating) copolymers and one poly(p-pyridinyleneethynylene).

scholarly journals Frontal Analysis Continuous Capillary Electrophoresis Study on the Interaction of an Amphiphilic Alternating Copolymer with Triton X-100

2011 ◽  
Vol 2011 ◽  
pp. 1-6 ◽  
Author(s):  
Akihito Hashidzume ◽  
Takuya Shimomachi ◽  
Takahiro Sato
Keyword(s):  
Capillary Electrophoresis ◽  
Cooperative Interaction ◽  
Frontal Analysis ◽  
Hill Model ◽  
Alternating Copolymers ◽  
Alternating Copolymer ◽  
Binding Isotherms ◽  
Sodium Maleate ◽  
Triton X ◽  
The Hill

The interaction of amphiphilic alternating copolymers of sodium maleate and dodecyl vinyl ether (Mal/C12) with a nonionic surfactant, Triton X-100 (TX), was investigated by frontal analysis continuous capillary electrophoresis (FACCE). The binding isotherms obtained from FACCE data were indicative of weak cooperative interaction for all the polymers examined. The cooperative interaction was also analyzed by the Hill model, and the results were compared with the previous results on the interaction of statistical copolymers of sodium 2-acrylamido-2-methylpropanesulfonate andN-dodecylmethacrylamide with TX.

Alternating Copolymerization of Butadiene and Propylene

1972 ◽  
Vol 45 (6) ◽  
pp. 1532-1545 ◽  
Author(s):  
Junji Furukawa
Keyword(s):  
Low Temperature ◽  
Carbonyl Compounds ◽  
Catalyst Activity ◽  
Active Species ◽  
Alternating Copolymer ◽  
Synthetic Rubber ◽  
Monomer Feed ◽  
Alternating Copolymerization ◽  
Titanium Compounds ◽  
Anionic Copolymerization

Abstract An alternating copolymer of propylene and butadiene is prepared with vanadium or titanium compounds and alkylaluminum compounds as the polymerization catalyst. The catalyst should be prepared at extremely low temperature as −70° C and halogen atom is essential to the catalyst activity. Carbonyl compounds such as ketone, acid, ester, acid anhydride, and acid peroxide are very effective additives to the catalyst for enhancement of the molecular weight of the polymer. Potentiometric titration and the ESR studies suggest that a divalent vanadium compound associated to form the dimer through a chloride bridge is a precursor of the active species. An anionic copolymerization mechanism involving the alternating coordination of monomers is proposed. The copolymer is always of a 1:1 composition irrespective of the composition of monomer feed and the alternating structure of trans-1,4-poly (butadiene co propylene) is estimated from IR and NMR data. The copolymer seems to be a new versatile synthetic rubber having excellent low temperature properties, high rebound, good compatibility with conventional rubbers, and high resistance toward aging.

Sign in / Sign up

Export Citation Format

Share Document