Hexameric cycles from hydrogen-bonded ureido-pyrimidinones

H.M. Keizer, A. Ramzi, R.P. Sijbesma, E.W. Meijer

Onderzoeksoutput: Hoofdstuk in Boek/Rapport/CongresprocedureConferentiebijdrageAcademic

Samenvatting

Supramol. polymers form a new class of polymers in which the reversibility of the non-covalent bonds between the monomers gives rise to interesting material properties. Ureido-pyrimidinone mols. strongly dimerize via quadruple hydrogen bonds and bi-functional derivs. form polymers or cyclic structures depending on the pre-organization of the linker and external conditions such as concn. and temp. Bi-functional ureido-pyrimidinone mols. with a meta-phenylene linker aggregate into hexameric cycles, due to pre-organization of the phenylene linker. SANS, viscosity and NMR-diffusion measurements showed that the hexameric cycles self-assemble into cylindrical aggregates, with solvent, concn. and temp. dependent length. These cylindrical aggregates may be used as scaffolds for thermoplastic elastomers, in which the cylinders form the hard-block and the polymer the soft-block. [on SciFinder (R)]
Originele taal-2Engels
TitelAbstracts of Papers 225th ACS National Meeting, New Orleans, LA, United States, March 23-27, 2003
Plaats van productieWashington
UitgeverijAmerican Chemical Society
Pagina'sPOLY-448
ISBN van geprinte versie0-8412-3872-3
StatusGepubliceerd - 2003
Evenement225th ACS National Meeting - New Orleans, Verenigde Staten van Amerika
Duur: 23 mrt 200327 mrt 2003

Congres

Congres225th ACS National Meeting
LandVerenigde Staten van Amerika
StadNew Orleans
Periode23/03/0327/03/03
Ander225th ACS National Meeting, Spring Meeting, New Orleans, LA, United States, March 23-27, 2003

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