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Chain growth condensation

Even general AB-type monomers, affording polyamide, polyester, polyether, and so on, undergo chain-growth condensation polymerization if the polymer end group becomes more reactive than the monomer by virtue of the change of substituent effects between the monomer and polymer. Both the resonance effect and inductive effect of the nucleophilic site on the reactivity of the electrophilic site at the para and meta positions of the monomer are applicable, respectively. [Pg.54]

Another approach to block copolymers of the aromatic polyamide and coil polymer is the macroinitiator method the chain-growth condensation polymerization of 22a from a macroinitiator derived from coil polymer. A diblock... [Pg.57]

An interesting thing is that the polyether with low polydispersity from chain-growth condensation polymerization possessed higher crystallinity than the one with broad molecular weight distribution from conventional step-growth condensation polymerization. The XRD pattern of the former polymer showed a stronger intensity, and the DSC profile showed the... [Pg.59]

The chain-growth condensation polymerization leading to aromatic polyether can be applied to the synthesis of a well-defined poly(ether sul-fone) by the condensation polymerization of 25, which is different from other monomers for chain-growth condensation polymerization in that the nucleophilic site and electrophilic site are on each benzene ring connected with an electron-withdrawing group, a sulfonyl group (Scheme 94). In the polymerization of 25 in the presence of an initiator and 18-crown-6 in sulfolane at... [Pg.60]

A quite different approach to chain-growth condensation polymerization is phase-transfer-catalyzed polycondensation of solid monomer dispersed in an... [Pg.67]

Figure 3.24 Scheme of chain-growth condensation polymerization. Source Reprinted with permission from Yokoyama A, Yokozav/nT. Macromolecules 2007 40 4093 [73]. Copyright 2007 American Chemical Society. (See insert for the color representation of the figure. )... [Pg.60]

T. Yokozawa, A. Yokoyama, Chain-Growth Condensation Polymerization for the Synthesis of Well-Defined Condensation Polymers and ll-Conjugated... [Pg.112]

Scope of controlled synthesis via chain-growth condensation polymerization From aromatic polyamides to Tt-conjugated polymers 13CC8281. Solid-state reactivity and structural transformations involving coordination polymers 13CSR1755. [Pg.238]

Yokoyama A, Yokozawa T. Converting step-growth to chain-growth condensation polymerization. Macromolecules 2007 40 4093 101. [Pg.27]

Based on these successful results, novel rod-coil BCPs have been synthesized by the combination of chain-growth condensation polymerization with other hving polymerization systems. For instance, Yokozawa synthesized rod-coil AB diblock (26) and rod-coU-iod ABA... [Pg.404]

Scheme 13.4 Synthesis of well-defined aromatic polyamides by chain-growth condensation... Scheme 13.4 Synthesis of well-defined aromatic polyamides by chain-growth condensation...
Yokozawa, T. and Yokoyama, A. (2009) Chain-growth condensation polymerization for the synthesis of well-defined condensation polymers and n-conjugated polymers. Chemical Reviews, 109,5595-5619. [Pg.428]

Chain-Growth Condensation Polymerization for Controlled Synthesis of Polymers... [Pg.191]

Keywords Catalyst-transfer Chain-growth condensation polymerization Living polymerizatiOTi Polycondensation jr-Conjugated polymers... [Pg.191]

Scheme 1 General scheme of chain-growth condensation polymerization via (1) change of substituent effect and (2) transfer of catalyst Ar aryl group, X halide, Y metal... Scheme 1 General scheme of chain-growth condensation polymerization via (1) change of substituent effect and (2) transfer of catalyst Ar aryl group, X halide, Y metal...
Scheme 8 Proposal of chain-growth condensation polymerization of monomer 8 in the presence of initiator with an electron-withdrawing group... Scheme 8 Proposal of chain-growth condensation polymerization of monomer 8 in the presence of initiator with an electron-withdrawing group...
See other pages where Chain growth condensation is mentioned: [Pg.46]    [Pg.56]    [Pg.59]    [Pg.60]    [Pg.61]    [Pg.61]    [Pg.61]    [Pg.62]    [Pg.63]    [Pg.64]    [Pg.67]    [Pg.196]    [Pg.59]    [Pg.41]    [Pg.45]    [Pg.453]    [Pg.404]    [Pg.419]    [Pg.421]    [Pg.593]    [Pg.191]    [Pg.192]    [Pg.194]   


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Chain condensation

Chain-Growth

Chain-growth condensation polymerization

Polycondensation (condensation chain growth

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