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.

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.

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

Sequence-controlled degradable polymers by controlled cationic copolymerization of vinyl ethers and aldehydes: precise placement of cleavable units at predetermined positions

2015 ◽  
Vol 6 (22) ◽  
pp. 4102-4108 ◽  
Author(s):  
Marie Kawamura ◽  
Arihiro Kanazawa ◽  
Shokyoku Kanaoka ◽  
Sadahito Aoshima
Keyword(s):  
Main Chain ◽  
Degradable Polymers ◽  
Vinyl Ethers ◽  
Cationic Copolymerization

Sequence-controlled degradable polymers with precisely placed breakable bonds in the main chain were synthesized by controlled alternating cationic copolymerization of vinyl ethers and aldehydes.

scholarly journals Thermoresponsive Polypeptoids

Polymers ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 2973
Author(s):  
Dandan Liu ◽  
Jing Sun
Keyword(s):  
Phase Transition ◽  
Functional Groups ◽  
Synthetic Methods ◽  
Stimuli Responsive ◽  
Thermoresponsive Polymers ◽  
Stimuli Responsive Polymers ◽  
Responsive Polymers ◽  
Reversible Phase Transition ◽  
Polymer Architectures ◽  
Reversible Phase

Stimuli-responsive polymers have been widely studied in many applications such as biomedicine, nanotechnology, and catalysis. Temperature is one of the most commonly used external triggers, which can be highly controlled with excellent reversibility. Thermoresponsive polymers exhibiting a reversible phase transition in a controlled manner to temperature are a promising class of smart polymers that have been widely studied. The phase transition behavior can be tuned by polymer architectures, chain-end, and various functional groups. Particularly, thermoresponsive polypeptoid is a type of promising material that has drawn growing interest because of its excellent biocompatibility, biodegradability, and bioactivity. This paper summarizes the recent advances of thermoresponsive polypeptoids, including the synthetic methods and functional groups as well as their applications.

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.

scholarly journals A cosolvent surfactant mechanism affects polymer collapse in miscible good solvents

2020 ◽  
Vol 3 (1) ◽  
Author(s):  
Swaminath Bharadwaj ◽  
Divya Nayar ◽  
Cahit Dalgicdir ◽  
Nico F. A. van der Vegt
Keyword(s):  
Soft Matter ◽  
Stimuli Responsive ◽  
Thermoresponsive Polymers ◽  
Polymer Swelling ◽  
Remarkable Effect ◽  
Stimuli Responsive Polymers ◽  
Polymer Collapse ◽  
Interfacial Solvation ◽  
Dynamics Simulations ◽  
And Function

Abstract The coil–globule transition of aqueous polymers is of profound significance in understanding the structure and function of responsive soft matter. In particular, the remarkable effect of amphiphilic cosolvents (e.g., alcohols) that leads to both swelling and collapse of stimuli-responsive polymers has been hotly debated in the literature, often with contradictory mechanisms proposed. Using molecular dynamics simulations, we herein demonstrate that alcohols reduce the free energy cost of creating a repulsive polymer–solvent interface via a surfactant-like mechanism which surprisingly drives polymer collapse at low alcohol concentrations. This hitherto neglected role of interfacial solvation thermodynamics is common to all coil–globule transitions, and rationalizes the experimentally observed effects of higher alcohols and polymer molecular weight on the coil-to-globule transition of thermoresponsive polymers. Polymer–(co)solvent attractive interactions reinforce or compensate this mechanism and it is this interplay which drives polymer swelling or collapse.

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