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Statements

Subject Item
n2:RIV%2F00216208%3A11320%2F14%3A10285480%21RIV15-MSM-11320___
rdf:type
skos:Concept n10:Vysledek
rdfs:seeAlso
http://dx.doi.org/10.3144/expresspolymlett.2014.38
dcterms:description
The microstructures of Estane 5703 aged at 70 degrees C in dry and wet air have been studied by small-angle neutron scattering. The samples were swollen in deuterated toluene for enhancing the contrast. The scattering data show the characteristic domain structure of polyurethanes consisting of soft and hard segments. Debye-Anderson-Brumberger function used with hard sphere structure factor, and the Teubner-Strey model are used to analyze the two-phase domain structure of the polymer. The combined effects of temperature and humidity have a strong disruption effect on the microstructures of Estane. For the sample aged at 70 degrees C in wet air for 1 month, the domain size, described by the correlation length, increases from 2.3 to 3.8 nm and their distance, expressed by hard-sphere interaction radius, increases from 8.4 to 10.6 nm. The structure development is attributed to degradation of polymer chains as revealed by gel permeation chromatography. The hydrolysis of ester links on polymer backbone at 70 degrees C in the presence of water humidity is the main reason for the changes of the microstructure. These findings can contribute to developing predictive models for the safety, performance, and lifetime of polyurethanes. The microstructures of Estane 5703 aged at 70 degrees C in dry and wet air have been studied by small-angle neutron scattering. The samples were swollen in deuterated toluene for enhancing the contrast. The scattering data show the characteristic domain structure of polyurethanes consisting of soft and hard segments. Debye-Anderson-Brumberger function used with hard sphere structure factor, and the Teubner-Strey model are used to analyze the two-phase domain structure of the polymer. The combined effects of temperature and humidity have a strong disruption effect on the microstructures of Estane. For the sample aged at 70 degrees C in wet air for 1 month, the domain size, described by the correlation length, increases from 2.3 to 3.8 nm and their distance, expressed by hard-sphere interaction radius, increases from 8.4 to 10.6 nm. The structure development is attributed to degradation of polymer chains as revealed by gel permeation chromatography. The hydrolysis of ester links on polymer backbone at 70 degrees C in the presence of water humidity is the main reason for the changes of the microstructure. These findings can contribute to developing predictive models for the safety, performance, and lifetime of polyurethanes.
dcterms:title
Small-angle neutron scattering investigation of polyurethane aged in dry and wet air Small-angle neutron scattering investigation of polyurethane aged in dry and wet air
skos:prefLabel
Small-angle neutron scattering investigation of polyurethane aged in dry and wet air Small-angle neutron scattering investigation of polyurethane aged in dry and wet air
skos:notation
RIV/00216208:11320/14:10285480!RIV15-MSM-11320___
n3:aktivita
n15:I
n3:aktivity
I
n3:cisloPeriodika
5
n3:dodaniDat
n4:2015
n3:domaciTvurceVysledku
n12:6076130
n3:druhVysledku
n14:J
n3:duvernostUdaju
n19:S
n3:entitaPredkladatele
n8:predkladatel
n3:idSjednocenehoVysledku
45400
n3:idVysledku
RIV/00216208:11320/14:10285480
n3:jazykVysledku
n13:eng
n3:klicovaSlova
aging; polyurethane; Estane 5703; SANS; material testing
n3:klicoveSlovo
n7:SANS n7:Estane%205703 n7:polyurethane n7:material%20testing n7:aging
n3:kodStatuVydavatele
HU - Maďarsko
n3:kontrolniKodProRIV
[9A9694F208CC]
n3:nazevZdroje
Express Polymer Letters
n3:obor
n18:BM
n3:pocetDomacichTvurcuVysledku
1
n3:pocetTvurcuVysledku
10
n3:rokUplatneniVysledku
n4:2014
n3:svazekPeriodika
8
n3:tvurceVysledku
Sun, G. Tian, Q. Krakovský, Ivan Rosta, L. Liu, J. Yan, G. Almasy, L. Veres, M. Chen, B. Zhou, X.
n3:wos
000332623200006
s:issn
1788-618X
s:numberOfPages
7
n17:doi
10.3144/expresspolymlett.2014.38
n16:organizacniJednotka
11320