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Statements

Subject Item
n2:RIV%2F70883521%3A28610%2F14%3A43871579%21RIV15-MSM-28610___
rdf:type
n9:Vysledek skos:Concept
rdfs:seeAlso
http://www.sciencedirect.com/science/article/pii/S0040603114002718
dcterms:description
This study investigated the mechanical and viscoelastic properties of poly(butylene adipate-co-butylene terephthalate) copolyesters, P(BA-co-BT)s and their composites, P(BA-co-BT)-WF with 20 vol.% of beech wood flour (WF) at dry (N2) and in humid atmosphere (50% RH) using a large temperature range from 20 to 90 °C. The melting behaviour of P(BA-co-BT) copolyesters were studied with differential scanning calorimetry (DSC) and wide-angle X-ray analysis. The increase of the aromatic moiety as well as reinforcement with WF improved stiffness of copolyesters. The ambient testing environment with the increased temperature negatively impacted the stiffness and strain properties of P(BA-co-BT)s as well as P(BA-co-BT)-WF composites. The loss of mechanical properties was accelerated in humid atmosphere due to hydrolytic degradation of the ester linkage in copolymers. It was determined that wood flour used as a reinforcement slightly contributed to the hygrothermal aging of P(BA-co-BT) composites. Understanding the effect of humid atmosphere combined with dynamic changed temperature provides useful information for the assessment of the hygrothermal stability of biodegradable polyesters. This study investigated the mechanical and viscoelastic properties of poly(butylene adipate-co-butylene terephthalate) copolyesters, P(BA-co-BT)s and their composites, P(BA-co-BT)-WF with 20 vol.% of beech wood flour (WF) at dry (N2) and in humid atmosphere (50% RH) using a large temperature range from 20 to 90 °C. The melting behaviour of P(BA-co-BT) copolyesters were studied with differential scanning calorimetry (DSC) and wide-angle X-ray analysis. The increase of the aromatic moiety as well as reinforcement with WF improved stiffness of copolyesters. The ambient testing environment with the increased temperature negatively impacted the stiffness and strain properties of P(BA-co-BT)s as well as P(BA-co-BT)-WF composites. The loss of mechanical properties was accelerated in humid atmosphere due to hydrolytic degradation of the ester linkage in copolymers. It was determined that wood flour used as a reinforcement slightly contributed to the hygrothermal aging of P(BA-co-BT) composites. Understanding the effect of humid atmosphere combined with dynamic changed temperature provides useful information for the assessment of the hygrothermal stability of biodegradable polyesters.
dcterms:title
Humidity response of poly(butylene adipate-co-butylene terephthalate) copolyesters and their composites with wood flour determined by dynamic mechanical analysis Humidity response of poly(butylene adipate-co-butylene terephthalate) copolyesters and their composites with wood flour determined by dynamic mechanical analysis
skos:prefLabel
Humidity response of poly(butylene adipate-co-butylene terephthalate) copolyesters and their composites with wood flour determined by dynamic mechanical analysis Humidity response of poly(butylene adipate-co-butylene terephthalate) copolyesters and their composites with wood flour determined by dynamic mechanical analysis
skos:notation
RIV/70883521:28610/14:43871579!RIV15-MSM-28610___
n3:aktivita
n16:P
n3:aktivity
P(ED2.1.00/03.0111)
n3:cisloPeriodika
Neuveden
n3:dodaniDat
n15:2015
n3:domaciTvurceVysledku
n4:4717791
n3:druhVysledku
n11:J
n3:duvernostUdaju
n19:S
n3:entitaPredkladatele
n17:predkladatel
n3:idSjednocenehoVysledku
19999
n3:idVysledku
RIV/70883521:28610/14:43871579
n3:jazykVysledku
n12:eng
n3:klicovaSlova
Viscoelastic properties; Relative humidity; Mechanical properties; Dynamic mechanical analysis; Crystallinity; Aliphatic-aromatic copolyesters
n3:klicoveSlovo
n6:Dynamic%20mechanical%20analysis n6:Aliphatic-aromatic%20copolyesters n6:Viscoelastic%20properties n6:Relative%20humidity n6:Mechanical%20properties n6:Crystallinity
n3:kodStatuVydavatele
NL - Nizozemsko
n3:kontrolniKodProRIV
[45ED7468BEB6]
n3:nazevZdroje
Thermochimica Acta
n3:obor
n20:CD
n3:pocetDomacichTvurcuVysledku
1
n3:pocetTvurcuVysledku
3
n3:projekt
n18:ED2.1.00%2F03.0111
n3:rokUplatneniVysledku
n15:2014
n3:svazekPeriodika
590
n3:tvurceVysledku
Pastorek, Miroslav Milinkovic, Angela Gregorová, Adriana
s:issn
0040-6031
s:numberOfPages
11
n13:doi
10.1016/j.tca.2014.06.010
n14:organizacniJednotka
28610