Biodegradable polymers from renewable resources: Effect of calcium inorganic impurity on polycondensation products of 2-L-hydroxy propanoic acid

Kód výsledku v IS VaVaI

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RIV/70883521:28610/12:43869059

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Biodegradable polymers from renewable resources: Effect of calcium inorganic impurity on polycondensation products of 2-L-hydroxy propanoic acid

Popis výsledku v původním jazyce

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 inthe 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 andslight decrease in glass transition temperature. The results revealed significant role of purification of lactic acid before its polycondensation to high molecular weight polymer.

Název v anglickém jazyce

Biodegradable polymers from renewable resources: Effect of calcium inorganic impurity on polycondensation products of 2-L-hydroxy propanoic acid

Popis výsledku anglicky

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 inthe 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 andslight decrease in glass transition temperature. The results revealed significant role of purification of lactic acid before its polycondensation to high molecular weight polymer.

Druh

D - Stať ve sborníku

CEP obor

CD - Makromolekulární chemie

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2012

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Advances in Environment, Biotechnology and Biomedicine

ISBN

978-1-61804-122-7

ISSN

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e-ISSN

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Počet stran výsledku

5

Strana od-do

267-271

Název nakladatele

WSEAS Press

Místo vydání

Praha

Místo konání akce

Zlín

Datum konání akce

20. 9. 2012

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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