Soluble hyperbranched copolymer via initiator-fragment incorporation radical copolymerization using a trivinyl monomer

Sato, Tsuneyuki; Nakamura, Tsukasa; Seno, Makiko; Hirano, Tomohiro

doi:10.1016/j.polymer.2006.02.096

Cited by 22 publications

(10 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An extraneous peak for -CH 3 protons of AIBN fragments in MIP-FA adduct/MIP occurred at 1.5 ppm and no peak corresponding to vinylic double bond of monomer was noticed after polymerization. This suggests the incorporation of corresponding isobutyronitrile (R) AIBN fragments in polymer resulting in hyperbranched (dendrimer-like) polymer [26].…”

Section: Characterization Of Coating Layermentioning

confidence: 99%

Electrochemical sensor for folic acid based on a hyperbranched molecularly imprinted polymer-immobilized sol–gel-modified pencil graphite electrode

Prasad

Madhuri

Tiwari

et al. 2010

Sensors and Actuators B: Chemical

124

View full text Add to dashboard Cite

Section: Characterization Of Coating Layermentioning

confidence: 99%

Electrochemical sensor for folic acid based on a hyperbranched molecularly imprinted polymer-immobilized sol–gel-modified pencil graphite electrode

Prasad

Madhuri

Tiwari

et al. 2010

Sensors and Actuators B: Chemical

124

View full text Add to dashboard Cite

“…There are several widely used methods for the synthesis of HB polymers, including both step‐ and chain‐growth reactions. The latter group includes the homo‐ or copolymerization of compounds, referred to as inimers, which contain both polymerizable and initiating groups in the same molecule, and the homo‐ or copolymerization of monomers containing more than one polymerizable functionality (crosslinkers) in the presence of agents mediating controlled/“living” polymerization, efficient chain transfer agents (CTAs), or large concentration of initiator . The inimer approach has the important advantage that crosslinked polymers are not formed even at high conversions, but its main drawback is the necessity to synthesize, often employing multistep methods, the asymmetric inimer molecules.…”

Section: Introductionmentioning

confidence: 99%

Employing Heterocyclic Hypervalent Iodine Compounds with ICl Bonds as Initiators and Chain Transfer Agents in the Synthesis of Branched Polymers

Cao

Kumar

Tsarevsky

2019

Macro Chemistry & Physics

View full text Add to dashboard Cite

Heterocyclic hypervalent (HV) iodine(III) compounds with ICl bonds and various substituents at the N atom are synthesized and found to be very efficient chain transfer agents in the polymerization of styrene with transfer coefficients exceeding that of CCl4 by 2–3 orders of magnitude, depending on the structure. The chain transfer rate coefficients are also determined. Due to the presence of thermally labile HV bonds, the compounds degrade homolytically upon heating and can initiate radical polymerization. For instance, 1‐chloro‐2‐hexyl‐1,2‐benziodazol‐3(2H)‐one, is used in the polymerization of styrene, which yields low molecular weight polymers with alkyl chloride groups at the α‐ (initiation) and the ω‐chain ends (transfer). Chain‐end functionalization reactions with azide and chain extension under low‐catalyst‐concentration atom transfer radical polymerization (ATRP) conditions of the prepared telechelic polymers are carried out. The same initiator/chain transfer agent is successfully employed in the synthesis of highly branched polymers with multiple alkyl chloride‐type chain ends when added to mixtures of styrene and 1,4‐divinylbenzene containing 10–80 mol% of the divinyl crosslinker, or even pure crosslinker. In all cases, soluble hyperbranched polymers are obtained up to moderate monomer conversions. The effects of crosslinker and HV iodine(III) compound concentrations on the polymerization outcome are studied systematically.

show abstract

“…As a result, the gelation point is delayed and (hyper)branched polymers are formed at relatively high monomer conversions. Additives that have been successfully employed include reagents capable of reversibly deactivating the propagating radicals (27,28), large amounts of radical sources (initiators) (29)(30)(31)(32), and chain transfer agents (33)(34)(35)(36)(37)(38). Of these, the last methodology demonstrates particularly good utility as it involves less purification and the use of inexpensive, commercially available reagents.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Star Polymers with Epoxide-Containing Highly Branched Cores by Low-Catalyst Concentration Atom Transfer Radical Polymerization and Post-Polymerization Modifications

Woodruff

Tsarevsky

2015

ACS Symposium Series

View full text Add to dashboard Cite

Star polymers were synthesized by atom transfer radical polymerization (ATRP) using a "core first" approach. Multibrominated, highly branched functional polymers were first synthesized by copolymerizing an epoxide-containing monomer, glycidyl methacrylate (GMA), with divinyl crosslinkers, ethylene glycol dimethacrylate or the reductively degradable bis(2-methacryloyloxyethyl) disulfide, in the presence of an efficient chain transfer agent, CBr 4 . Multiple alkyl bromide chain end groups were present in the branched polymers, which were successfully used as multifunctional macroinitiators, from which both polyacrylateand polymethacrylate-type arms were grown under low catalyst concentration ATRP conditions. Due to the ability of epoxides to reduce Cu II to Cu I complexes, the low catalyst-concentration ATRP chain extensions were performed in the absence of any externally added reducing agents. The cores of the obtained stars, contained numerous epoxide functionalities, originating from GMA, and were efficiently modified using reactions with a variety of tertiary aliphatic amines to afford star polymers with hydrophilic, cationic cores. Ring-opening of the oxirane rings in polyGMA with a pyridine derivative, nicotinamide, in

show abstract

Soluble hyperbranched copolymer via initiator-fragment incorporation radical copolymerization using a trivinyl monomer

Cited by 22 publications

References 31 publications

Electrochemical sensor for folic acid based on a hyperbranched molecularly imprinted polymer-immobilized sol–gel-modified pencil graphite electrode

Electrochemical sensor for folic acid based on a hyperbranched molecularly imprinted polymer-immobilized sol–gel-modified pencil graphite electrode

Employing Heterocyclic Hypervalent Iodine Compounds with ICl Bonds as Initiators and Chain Transfer Agents in the Synthesis of Branched Polymers

Synthesis of Star Polymers with Epoxide-Containing Highly Branched Cores by Low-Catalyst Concentration Atom Transfer Radical Polymerization and Post-Polymerization Modifications

Contact Info

Product

Resources

About