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000281787 1001_ $$0P:(DE-Juel1)130501$$aAllgaier, J.$$b0$$eCorresponding author$$ufzj
000281787 245__ $$aSynthesis and rheological behavior of poly(1,2-butylene oxide) based supramolecular architectures
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000281787 520__ $$aIn this work we present the synthesis of poly(1,2-butylene oxide) (PBO) functionalized with the complementary hydrogen bond forming groups 2,4-diaminotriazine (DAT) and thymine. PBO is a rubbery polymer. Due to its semi-polar nature PBO is expected to suppresses non-directed cluster formation of the supramolecular groups but not influence their directed interactions. For the synthesis of backbone functionalized polymers we developed a procedure which allowed randomly copolymerizing BO with 1,2-epoxy-7-octene using anionic ring opening polymerization with potassium tert-butanolate as initiator. The vinyl groups were converted to OH-groups by oxidation. In addition, PBO with one alcoholic end group was obtained by homopolymerization of BO. For the variant with OH-groups at both chain ends a procedure was developed which was based on the cleavage of the tert-butyl initiator group. In all the polymers the alcohol groups were basically quantitatively transformed into NH2-groups. DAT and thymine functionalities were attached to the NH2-groups again in almost quantitative conversion. All reaction steps were monitored by 1H-NMR using pyridine-d5 as solvent. This method allowed determining the conversions of the different synthesis steps with high precision. The materials were examined in linear rheology in order to study the effect of the hydrogen-bonds on the dynamics of the resulting supramolecular structures. The results corroborate the exclusive existence of directed interactions between the supramolecular groups.
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000281787 7001_ $$0P:(DE-Juel1)145383$$aHövelmann, Claas$$b1$$ufzj
000281787 7001_ $$0P:(DE-HGF)0$$aWei, Zhang$$b2
000281787 7001_ $$0P:(DE-Juel1)162139$$aStaropoli, Mariapaola$$b3$$ufzj
000281787 7001_ $$0P:(DE-Juel1)130902$$aPyckhout-Hintzen, Wim$$b4$$ufzj
000281787 7001_ $$0P:(DE-Juel1)144193$$aLühmann, Nicole$$b5$$ufzj
000281787 7001_ $$0P:(DE-Juel1)133857$$aWillbold, Sabine$$b6$$ufzj
000281787 773__ $$0PERI:(DE-600)2623224-8$$a10.1039/C5RA24547H$$gVol. 6, no. 8, p. 6093 - 6106$$n8$$p6093 - 6106$$tRSC Advances$$v6$$x2046-2069$$y2016
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