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Statements

Subject Item
n2:RIV%2F70883521%3A28110%2F12%3A43869203%21RIV13-MSM-28110___
rdf:type
skos:Concept n18:Vysledek
dcterms:description
The purpose of the presented work is to examined the effect of calcium based inorganic impurity originating from biotechnological L-lactic acid production from cheese whey on synthesis of poly(L-lactic acid). The influence of impurity was investigated in the range of 0 to 1 wt. % and the changes in molecular weight, melting and glass transition temperatures were studied by the analytical technique gel permeation chromatography and differential scanning calorimetry. Results show moderate reduction of molecular weight with rising amount of the impurity up to 0.75 wt. %. The higher concentration caused high extend of decomposition reaction and no yield was obtained. The thermal properties investigation shows noticeable reduction of melting temperature and slight decrease in glass transition temperature. The results revealed significant role of purification of lactic acid before its polycondensation to high molecular weight polymer. The purpose of the presented work is to examined the effect of calcium based inorganic impurity originating from biotechnological L-lactic acid production from cheese whey on synthesis of poly(L-lactic acid). The influence of impurity was investigated in the range of 0 to 1 wt. % and the changes in molecular weight, melting and glass transition temperatures were studied by the analytical technique gel permeation chromatography and differential scanning calorimetry. Results show moderate reduction of molecular weight with rising amount of the impurity up to 0.75 wt. %. The higher concentration caused high extend of decomposition reaction and no yield was obtained. The thermal properties investigation shows noticeable reduction of melting temperature and slight decrease in glass transition temperature. The results revealed significant role of purification of lactic acid before its polycondensation to high molecular weight polymer.
dcterms:title
Biodegradable polymers from renewable resources: Effect of calcium inorganic impurity on polycondensation products of 2-L-hydroxy propanoic acid Biodegradable polymers from renewable resources: Effect of calcium inorganic impurity on polycondensation products of 2-L-hydroxy propanoic acid
skos:prefLabel
Biodegradable polymers from renewable resources: Effect of calcium inorganic impurity on polycondensation products of 2-L-hydroxy propanoic acid Biodegradable polymers from renewable resources: Effect of calcium inorganic impurity on polycondensation products of 2-L-hydroxy propanoic acid
skos:notation
RIV/70883521:28110/12:43869203!RIV13-MSM-28110___
n18:predkladatel
n19:orjk%3A28110
n3:aktivita
n11:S n11:P
n3:aktivity
P(ED2.1.00/03.0111), S
n3:dodaniDat
n22:2013
n3:domaciTvurceVysledku
n4:6339603 n4:3382257 n4:3917436 n4:8588716
n3:druhVysledku
n8:D
n3:duvernostUdaju
n16:S
n3:entitaPredkladatele
n21:predkladatel
n3:idSjednocenehoVysledku
125005
n3:idVysledku
RIV/70883521:28110/12:43869203
n3:jazykVysledku
n6:eng
n3:klicovaSlova
polylactide, lactic acid, impurity
n3:klicoveSlovo
n10:impurity n10:lactic%20acid n10:polylactide
n3:kontrolniKodProRIV
[B2031A2F0C34]
n3:mistoKonaniAkce
Zlín
n3:mistoVydani
Zlín
n3:nazevZdroje
Advances in Environment, Biotechnology and Biomedicine
n3:obor
n15:CD
n3:pocetDomacichTvurcuVysledku
4
n3:pocetTvurcuVysledku
4
n3:projekt
n5:ED2.1.00%2F03.0111
n3:rokUplatneniVysledku
n22:2012
n3:tvurceVysledku
Stloukal, Petr Koutný, Marek Kucharczyk, Pavel Sedlařík, Vladimír
n3:typAkce
n14:WRD
n3:zahajeniAkce
2012-09-20+02:00
s:numberOfPages
5
n17:hasPublisher
Univerzita Tomáše Bati ve Zlíně
n12:isbn
978-1-61804-125-8
n13:organizacniJednotka
28110