Molecular parameters of hyperbranched polymers made by self-condensing vinyl polymerization of macroinimers

Simon, Peter F. W.; Müller, Axel H. E.

doi:10.1002/1521-3919(20001101)9:8<621::aid-mats621>3.0.co;2-m

Cited by 16 publications

(4 citation statements)

References 17 publications

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“…2), as predicted by Mu ¨ller et al for inimertype polymerizations with active centers of similar reactivity. 7 The viscosity also grew exponentially as shown in Figure 3, but to a smaller extent than the M n . At the same time, the combined semilogarithmic rate plot was linear (Fig.…”

Section: Synthesis and Characterization Of The Arbpib Corementioning

confidence: 80%

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Novel thermoplastic elastomers based on arborescent (dendritic) polyisobutylene with short copolymer end sequences

Puskás

Santos

Kaszás

et al. 2009

J. Polym. Sci. A Polym. Chem.

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This article presents the synthesis and initial characterization of polymers having a high molecular weight dendritic (arborescent) polyisobutylene (arbPIB) core and short end sequences composed of copolymers of isobutylene with isoprene, p‐methyl styrene, or cyclopentadiene. The first stage of the polymerizations was controlled/living (i.e., no chain transfer or irreversible termination were detected) and the process was reproducible. The hydrodynamic radii of arbPIBs were measured by viscometry and quasi‐elastic light scattering, and good agreement between the two methods is demonstrated for the first time in this paper. Sequential addition of the second monomer(s) led to the formation of short copolymer end sequences. We have discovered that regardless of the Tg of the copolymer end blocks, the new block copolymers exhibited TPE properties, which were improved by carbon black and silica fillers to a great extent. These novel PIB‐based TPEs are promising new biomaterials. © 2009 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 47: 1148–1158, 2009

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Section: Synthesis and Characterization Of The Arbpib Corementioning

confidence: 80%

“…1,2 The measured M w /M n values, however, are much lower than those predicted by Simon and Mu ¨ller. 7 Figure 7 also shows the q versus elution time plot; the almost horizontal line demonstrates self-similarity across the distribution.…”

Section: Synthesis and Characterization Of The Arbpib Corementioning

confidence: 98%

Novel thermoplastic elastomers based on arborescent (dendritic) polyisobutylene with short copolymer end sequences

Puskás

Santos

Kaszás

et al. 2009

J. Polym. Sci. A Polym. Chem.

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“…The results were listed in Table . It showed that the branching structure was increased with the increasing of conversion, which was consisted with the SCVP process …”

Section: Resultsmentioning

confidence: 98%

Branched polystyrene with high reflex index synthesized from selenium-mediated polymerization

Zhou

Pan

et al. 2013

J. Polym. Sci. Part A: Polym. Chem.

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In this article, the polymerization behavior has been investigated utilizing phenyl(4-vinylbenzyl)selane (PVBS) as an inimer under ultraviolet irradiation. Corresponding copolymers and homopolymers were synthesized by copolymerization PVBS with styrene and homopolymerization itself. The branching factors (g 0 ) of these branched polymers were characterized along with the polymerization conditions. Moreover, the results showed that the obtained polymers' refractive index (RI) can be enhanced by the introducing of selenium element. The results also indicated that the RI of obtained polymers could be adjusted extendedly by changing selenium content in them.

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“…Reaction of an inimer with a vinyl comonomer leads to self-condensing vinyl copolymerization (SCVCP). Müller and co-workers reported on theoretical calculations of SCVCP. − In this case, the reaction of inimer AB* with the vinyl group of comonomer M results in the formation of a species with one active site, A-b-M*. Both the initiating B* group, propagating center A*, and the newly created M* can react with any other vinyl group.…”

Section: Introductionmentioning

confidence: 99%

Hyperbranched and Hyperstar Polybutadienes via Anionic Self-Condensing Vinyl Copolymerization

et al. 2021

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We synthesized highly branched polybutadienes by anionic self-condensing vinyl copolymerization (ASCVCP) of a butyllithium/divinylbenzene (DVB)-based initiator monomer (inimer) and butadiene. The molecular structure of polybutadienes was evaluated by SEC with MALLS and viscosity detection. SEC/viscosity measurements confirmed the branched structure of the obtained polymers. Examination of polymerization of two isomers of divinylbenzene, i.e., para-and meta-DVB, revealed differences in the mechanism. MALDI-ToF mass spectrometric analysis in the case of p-divinylbenzene indicates macroinimer formation as the first step, followed by condensation of the macroinimers into a highly branched polymer with narrowly distributed polybutadiene segments. The living nature of the polymerization allowed further amino-functionalization of the hyperbranched polybutadienes or subsequent growth of (meth)acrylate arms leading to hyperstar molecules. The reactivity of the primary amino groups in the aminofunctionalized copolymers was used in the grafting-onto reaction, i.e., amide formation with ω-carboxy-poly(N-isopropylacrylamide), leading to another type of hyperstar. To the best of our knowledge, these are the first examples of hyperstars with a polybutadiene copolymer core described to date.

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Molecular parameters of hyperbranched polymers made by self-condensing vinyl polymerization of macroinimers

Cited by 16 publications

References 17 publications

Novel thermoplastic elastomers based on arborescent (dendritic) polyisobutylene with short copolymer end sequences

Novel thermoplastic elastomers based on arborescent (dendritic) polyisobutylene with short copolymer end sequences

Branched polystyrene with high reflex index synthesized from selenium-mediated polymerization

Hyperbranched and Hyperstar Polybutadienes via Anionic Self-Condensing Vinyl Copolymerization

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