Hyperbranched and Hyperstar Polybutadienes via Anionic Self-Condensing Vinyl Copolymerization

Title data

Novoa-Carballal, Ramon ; Nosov, Sergey ; Pfaff, Sandrine ; Schmalz, Holger ; Müller, Axel H. E.:
Hyperbranched and Hyperstar Polybutadienes via Anionic Self-Condensing Vinyl Copolymerization.
In: Macromolecules. Vol. 54 (2021) Issue 12 . - pp. 5774-5783.
ISSN 1520-5835
DOI: https://doi.org/10.1021/acs.macromol.1c00537

Official URL:

Abstract in another language

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 amino-functionalized 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.

Further data

Item Type:	Article in a journal
Refereed:	Yes
Institutions of the University:	Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Macromolecular Chemistry II Research Institutions > Affiliated Institutes > Bavarian Polymer Institute (BPI) Faculties Faculties > Faculty of Biology, Chemistry and Earth Sciences Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry Research Institutions Research Institutions > Affiliated Institutes
Result of work at the UBT:	Yes
DDC Subjects:	500 Science > 540 Chemistry
Date Deposited:	09 Jun 2021 08:29
Last Modified:	22 Dec 2021 10:55
URI:	https://eref.uni-bayreuth.de/id/eprint/65696