Role of functionalized terminal groups in formation of nanofibrillar morphology of hyperbranched polyesters

Autor:	Sergiy Peleshanko, V. V. Shevchenko, Vladimir V. Tsukruk, Maryna Ornatska, Matthew D. Goodman, Kathryn N. Bergman
Rok vydání:	2006
Předmět:	chemistry.chemical_classification Morphology (linguistics) Polymers and Plastics Organic Chemistry Polyester End-group chemistry.chemical_compound chemistry Amphiphile Polymer chemistry Monolayer Materials Chemistry Organic chemistry Self-assembly Alkyl Acyl group
Zdroj:	Polymer. 47:8137-8146
ISSN:	0032-3861
DOI:	10.1016/j.polymer.2006.09.035
Popis:	A series of amphiphilic hyperbranched polymers with a polyester–polyol core and 64 terminal hydroxyl groups were modified by substituting various terminal groups: alkyl tails, amino, and carboxyl groups. The effect of the pendant groups' chemical composition on the resulting surface morphology within Langmuir–Blodgett monolayers with respect to their ability to form nanofibrillar surface structures was investigated. We demonstrated that the amphiphilicity of the polyester core with 64 hydroxyl groups can be achieved if a fraction of alkyl tails (C15) is higher than 1/4. Nanofibrillar morphology was consistently formed as the highly polar functional groups were added to the polyester cores in combination with a significant (>30%) fraction of alkyl terminal groups. Addition of amino end groups was observed to be much more effective in promoting the nanofibrillar assembly than the addition of carboxyl end groups.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3e4938a0c79d6f23e8e3986080a8c329 https://doi.org/10.1016/j.polymer.2006.09.035 Zobrazit plný text záznamu Full Text from ScienceDirect