Influence of chain extenders and chain end groups on properties of segmented polyurethanes. I. Phase morphology

Savelyev, YuV; Akhranovich, ER; Grekov, AP; Privalko, EG; Korskanov, VV; Shtompel, VI; Privalko, VP; Pissis, P; Kanapitsas, A

dc.contributor.author	Savelyev, YuV	en
dc.contributor.author	Akhranovich, ER	en
dc.contributor.author	Grekov, AP	en
dc.contributor.author	Privalko, EG	en
dc.contributor.author	Korskanov, VV	en
dc.contributor.author	Shtompel, VI	en
dc.contributor.author	Privalko, VP	en
dc.contributor.author	Pissis, P	en
dc.contributor.author	Kanapitsas, A	en
dc.date.accessioned	2014-03-01T01:13:50Z
dc.date.available	2014-03-01T01:13:50Z
dc.date.issued	1998	en
dc.identifier.issn	0032-3861	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/12738
dc.subject	Chain ends	en
dc.subject	Chain extenders	en
dc.subject	Degree of microphase separation	en
dc.subject.classification	Polymer Science	en
dc.subject.other	Composition effects	en
dc.subject.other	Glycols	en
dc.subject.other	Molecular structure	en
dc.subject.other	Phase separation	en
dc.subject.other	Specific heat of solids	en
dc.subject.other	Chain extenders	en
dc.subject.other	Diphenylmethane diisocyanate	en
dc.subject.other	Isophthalipc acid	en
dc.subject.other	Oligotetramethylene glycol	en
dc.subject.other	X ray scattering	en
dc.subject.other	Polyurethanes	en
dc.title	Influence of chain extenders and chain end groups on properties of segmented polyurethanes. I. Phase morphology	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S0032-3861(97)10101-X	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0032-3861(97)10101-X	en
heal.language	English	en
heal.publicationDate	1998	en
heal.abstract	Segmented polyurethanes from oligotetramethylene glycol 1000, 4,4′-diphenylmethane diisocyanate and different chain extenders were characterized by specific heat capacity (temperature interval 130-450 K) and small-angle X-ray scattering measurements. A regular macrolattice of uniform-size micro-domains of stiff segments spanning a continuous matrix of soft segments was observed for the sample chain-extended with dihydrazide of isophthalipc acid, DIPA. The distribution of microdomains by sizes remained unchanged, whereas the overall degree of micropahase separation (DMS) increased due to dilution of DIPA and/or blocking of chain ends with crown ether-containing di- and monohydrazides. The distribution of microdomains by sizes broadened, whereas the DMS either remained unchanged or slightly decreased on dilution of DIPA with hydroxyl-containing chain extenders [1,4-di-N-oxy-2,3-bis-(oxymethyl)-quinoxaline and 1,4-butane-diol, respectively]. © 1998 Elsevier Science Ltd. All rights reserved.	en
heal.publisher	ELSEVIER SCI LTD	en
heal.journalName	Polymer	en
dc.identifier.doi	10.1016/S0032-3861(97)10101-X	en
dc.identifier.isi	ISI:000073791900018	en
dc.identifier.volume	39	en
dc.identifier.issue	15	en
dc.identifier.spage	3425	en
dc.identifier.epage	3429	en