Modern cationic vinyl polymerization

Sawamoto, Mitsuo

doi:10.1016/0079-6700(91)90008-9

Cited by 413 publications

(207 citation statements)

References 335 publications

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“…Along with the development of initiating systems, Higashimura's group, including Sawamoto and us, achieved the living cationic polymerization of various types of functional monomers to give end-functionalized, block, and star-shaped polymers. 22 The aim of our group has since gradually shifted toward the synthesis of functional and/or stimuli-responsive polymers. 23, 24 We have therefore been investigating the living cationic polymerization of polar monomers in the presence of an added base because a variety of polar functional groups and well-defined structures are essential for intelligent and stimuli-responsive self-assembling systems.…”

Section: Introductionmentioning

confidence: 99%

New stage in living cationic polymerization: An array of effective Lewis acid catalysts and fast living polymerization in seconds

Aoshima

Yoshida

Kanazawa

et al. 2007

J. Polym. Sci. A Polym. Chem.

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Our recent extensive research on Lewis acid catalysts with a weak base for the cationic polymerization of vinyl ethers led to unprecedented living reaction systems: fast living polymerization within 1-3 s; a wide choice of metal halides containing Al, Sn, Fe, Ti, Zr, Hf, Zn, Ga, In, Si, Ge, and Bi; and heterogeneously catalyzed living polymerization with Fe 2 O 3 . The use of added bases for the stabilization of the propagating carbocation and the appropriate selection of Lewis acid catalysts were crucial to the success of such new types of living polymerizations. In addition, the base-stabilized living polymerization allowed the quantitative synthesis of star-shaped polymers with a narrow molecular weight distribution via polymerlinking reactions and the precision synthesis and self-assembly of stimuli-responsive block copolymers.

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Section: Introductionmentioning

confidence: 99%

New stage in living cationic polymerization: An array of effective Lewis acid catalysts and fast living polymerization in seconds

Aoshima

Yoshida

Kanazawa

et al. 2007

J. Polym. Sci. A Polym. Chem.

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“…[386] T g = 60 • C [371]; T m = 149 • C for M n = 14,920 g/mol, PDI = 1.2 [365] [103,407] Polymer-protected gold nanoparticles [413] Time-limited colloidal stability; stable droplets [188]; mesoglobules above 50 • C; liquid-liquid macrophase separation within a month [55] (continued) further increase in M n hardly affects T cp [405] No hysteresis [405] Gradient, random and block copolymers with PEOVEth [424] …”

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confidence: 99%

Non-ionic Thermoresponsive Polymers in Water

Aseyev

Tenhu

Winnik

2010

Advances in Polymer Science

455

511

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Numerous non-ionic thermally responsive homopolymers phase separate from their aqueous solutions upon heating. Far fewer neutral homopolymers are known to phase separate upon cooling. A systematic compilation of the polymers reported to exhibit thermoresponsive behaviour is presented in this review, including N-substituted poly[(meth)acrylamide]s, poly(N-vinylamide)s, poly(oxazoline)s, protein-related polymers, poly(ether)s, polymers based on amphiphilic balance, and elastin-like synthetic polymers. Basic properties of aqueous solutions of these polymers are briefly described.

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“…The control over the chain growth has been established by tuning nucleophilicity of the counter anion generated in the presence of zinc halides [67,68]. Mechanistically, photochemically generated acid reacts with the vinyl ether monomer to form the monomer HX adduct.…”

Section: Photoinduced Metal Free Cationic Polymerization Techniquesmentioning

confidence: 99%

Photoinitiated Metal Free Living Radical and Cationic Polymerizations

Çiftçi

Yılmaz

Yaǧcı

2017

J. Photopol. Sci. Technol.

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Although conventional photoinitiated radical and cationic polymerizations are widely used in many industrial applications, they usually proceed in an uncontrolled manner. Recent developments in photomediated living/controlled radical and cationic polymerization made it possible to prepare various well-defined polymers with complex architecture under mild conditions. Various methods described for cationic and radical polymerization utilizes metal or Lewis acid catalysts. Several strategies eliminating the use of such additives in photoinduced controlled/living radical and cationic polymerizations have been developed. This article describes various photoinitiation systems acting in UV-vis range. Their mechanistic details are also evaluated and several specific examples involving combination both free radical and cationic routes are presented.

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Modern cationic vinyl polymerization

Cited by 413 publications

References 335 publications

New stage in living cationic polymerization: An array of effective Lewis acid catalysts and fast living polymerization in seconds

New stage in living cationic polymerization: An array of effective Lewis acid catalysts and fast living polymerization in seconds

Non-ionic Thermoresponsive Polymers in Water

Photoinitiated Metal Free Living Radical and Cationic Polymerizations

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