Exceptional copolymerizability of o-phthalaldehyde in cationic copolymerization with vinyl monomers

2019 ◽  
Vol 10 (27) ◽  
pp. 3712-3717 ◽  
Author(s):  
Keisuke Hayashi ◽  
Arihiro Kanazawa ◽  
Sadahito Aoshima
Keyword(s):  
Active Species ◽  
Vinyl Monomers ◽  
Vinyl Ethers ◽  
Cationic Copolymerization ◽  
Sterically Hindered ◽  
Alternating Copolymerization

o-Phthalaldehyde is copolymerized via the unique active species, which allows the controlled copolymerization with alkyl vinyl ethers, alternating copolymerization, and copolymerization with sterically hindered nonhomopolymerizable vinyl monomers.

Controlled cationic copolymerization of vinyl monomers and cyclic acetals via concurrent vinyl-addition and ring-opening mechanisms: the systematic study of structural effects on the copolymerization behavior

2019 ◽  
Vol 10 (39) ◽  
pp. 5304-5314 ◽  
Author(s):  
Kazuya Maruyama ◽  
Arihiro Kanazawa ◽  
Sadahito Aoshima
Keyword(s):  
Systematic Study ◽  
Ring Opening ◽  
Vinyl Monomers ◽  
Structural Effects ◽  
Vinyl Ethers ◽  
Cyclic Acetals ◽  
Cationic Copolymerization

The effects of the structures of cyclic acetals on the copolymerization behavior were systematically investigated in the cationic copolymerization with vinyl ethers.

Dual stimuli-responsive copolymers with precisely arranged degradable units: synthesis by controlled alternating copolymerization of oxyethylene-containing vinyl ethers and conjugated aldehydes

2019 ◽  
Vol 10 (30) ◽  
pp. 4134-4141 ◽  
Author(s):  
Suzuka Matsumoto ◽  
Arihiro Kanazawa ◽  
Shokyoku Kanaoka ◽  
Sadahito Aoshima
Keyword(s):  
Stimuli Responsive ◽  
Vinyl Ethers ◽  
Thermoresponsive Polymers ◽  
Cationic Copolymerization ◽  
Alternating Copolymerization

Thermoresponsive polymers with precisely arranged degradable units were synthesized via controlled cationic copolymerization of oxyethylene-containing vinyl ethers and conjugated aldehydes.

Alternating copolymerization through the complexes of conjugated vinyl monomers-alkylaluminum halides

1996 ◽  
Vol 34 (12) ◽  
pp. 1381-1396 ◽  
Author(s):  
Masaaki Hirooka ◽  
Hiroshi Yabuuchi ◽  
Jiro Iseki ◽  
Yasuto Nakai
Keyword(s):  
Vinyl Monomers ◽  
Alternating Copolymerization

Photoinitiated alternating copolymerization of vinyl ethers with chlorotrifluoroethylene

2002 ◽  
Vol 51 (7) ◽  
pp. 577-584 ◽  
Author(s):  
Manuel Gaboyard ◽  
Yves Hervaud ◽  
Bernard Boutevin
Keyword(s):  
Vinyl Ethers ◽  
Alternating Copolymerization

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.

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