Synthesis and structural peculiarities of 1,1-dimethylhydrazine-based polyurethanes

Savelyev, YV; Veselov, VY; Kharitonova, VK; Savelyeva, OA; Shtompel, VI; Perekhrest, AI; Travinskaya, TV; Kanapitsas, A; Pissis, P

dc.contributor.author	Savelyev, YV	en
dc.contributor.author	Veselov, VY	en
dc.contributor.author	Kharitonova, VK	en
dc.contributor.author	Savelyeva, OA	en
dc.contributor.author	Shtompel, VI	en
dc.contributor.author	Perekhrest, AI	en
dc.contributor.author	Travinskaya, TV	en
dc.contributor.author	Kanapitsas, A	en
dc.contributor.author	Pissis, P	en
dc.date.accessioned	2014-03-01T01:32:01Z
dc.date.available	2014-03-01T01:32:01Z
dc.date.issued	2009	en
dc.identifier.issn	0021-8995	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/20023
dc.subject	Polyurethanes	en
dc.subject	Structure-property relations	en
dc.subject	Synthesis	en
dc.subject.classification	Polymer Science	en
dc.subject.other	Aminolysis	en
dc.subject.other	Branched structures	en
dc.subject.other	Dimethylhydrazine	en
dc.subject.other	Dynamic glass transitions	en
dc.subject.other	Flexible blocks	en
dc.subject.other	Ir spectroscopies	en
dc.subject.other	Linear structures	en
dc.subject.other	Nitrogen atoms	en
dc.subject.other	Non-stoichiometric ratios	en
dc.subject.other	Nonaqueous titrations	en
dc.subject.other	Nonstoichiometric	en
dc.subject.other	Number averages	en
dc.subject.other	Small - angle X-ray scatterings	en
dc.subject.other	Structural peculiarities	en
dc.subject.other	Structural studies	en
dc.subject.other	Structure-property relations	en
dc.subject.other	Synthesis	en
dc.subject.other	Viscosimetry	en
dc.subject.other	Water sorptions	en
dc.subject.other	Atomic spectroscopy	en
dc.subject.other	Ethylene glycol	en
dc.subject.other	Glass transition	en
dc.subject.other	Polyurethanes	en
dc.subject.other	Sorption	en
dc.subject.other	Titration	en
dc.subject.other	X ray scattering	en
dc.subject.other	Polymers	en
dc.subject.other	absorption	en
dc.subject.other	dielectric property	en
dc.subject.other	glass transition temperature	en
dc.subject.other	polymer blend	en
dc.subject.other	polyurethane	en
dc.subject.other	rheology	en
dc.subject.other	synthesis	en
dc.subject.other	water	en
dc.title	Synthesis and structural peculiarities of 1,1-dimethylhydrazine-based polyurethanes	en
heal.type	journalArticle	en
heal.identifier.primary	10.1002/app.28784	en
heal.identifier.secondary	http://dx.doi.org/10.1002/app.28784	en
heal.language	English	en
heal.publicationDate	2009	en
heal.abstract	Novel polyurethanes (PUs) based on poly (oxytetramethylene glycol), 4,4'-methylenediphenyl diisocyanate, and 1,1-dimethylhydrazine (DMH) were prepared. Stoichiometric (1 : 1) and nonstoichiometric (2 : 1 to 20 : 1) prepolymer/DMH ratios were studied. The number-average molecular masses and possible structures of the obtained polymers were evaluated by potentiometric nonaqueous titration analysis of terminal groups, the Kieldal method (the evaluation of the nitrogen atom content), the aminolysis method, viscosimetry, IR spectroscopy, rheology, and small-angle X-ray scattering. Only in the case of the stoichiometric (1 : 1) ratio was a low-molecular-mass PU with a linear structure formed, whereas for all studied nonstoichiometric ratios, PUs with branched structures were formed. The level of hard and flexible block segregation increased with the increase in the prepolymer/DMH ratio. Dielectric results for the dynamic glass transition and water sorption measurements provided additional support to the structural studies. (C) 2009 Wiley Periodicals, Inc. J Appl Polym Sci 112:2732-2740, 2009	en
heal.publisher	JOHN WILEY & SONS INC	en
heal.journalName	Journal of Applied Polymer Science	en
dc.identifier.doi	10.1002/app.28784	en
dc.identifier.isi	ISI:000265076100018	en
dc.identifier.volume	112	en
dc.identifier.issue	5	en
dc.identifier.spage	2732	en
dc.identifier.epage	2740	en