Molecular Bottlebrushes with Bimodal Length Distribution of Side Chains

Autor:	William F. M. Daniel, Sergei S. Sheiko, Krzysztof Matyjaszewski, Brittany Robertson, Yuanchao Li, Joanna Burdynska
Rok vydání:	2015
Předmět:	chemistry.chemical_classification Polymers and Plastics Atom-transfer radical-polymerization Organic Chemistry Polymer Grafting Inorganic Chemistry surgical procedures operative chemistry Polymerization Polymer chemistry Materials Chemistry Copolymer Side chain Molar mass distribution Macromolecule
Zdroj:	Macromolecules. 48:4813-4822
ISSN:	1520-5835 0024-9297
DOI:	10.1021/acs.macromol.5b00795
Popis:	The structural details of bottlebrush polymers, specifically the grafting density and molecular weight distribution of side chains, influence their physical properties; however, they are difficult to analyze using conventional techniques. Herein we report the synthesis, characterization, and molecular imaging of bottlebrush macromolecules with both uniform and bimodal length distributions of poly(n-butyl acrylate) (PnBA) side chains. The densely grafted copolymers were prepared via the “grafting from” approach using atom transfer radical polymerization (ATRP). Bottlebrush macromolecules with both shorter and longer grafted chains were prepared by removal of a fraction of the bromine chain ends of the initial densely grafted brush by selective capping with 4-butoxy-TEMPO and subsequent chain extension of remaining active chains forming longer PnBA grafts. This procedure provided bottlebrush macromolecules with two distinct degrees of polymerization of the grafted side chains herein called bimodal grafts. A...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::1f07a2b08b2a02985f8ad11b1d2289c1 https://doi.org/10.1021/acs.macromol.5b00795 Zobrazit plný text záznamu