Biodegradation of waste PET based copolyesters in thermophilic anaerobic sludge

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F15%3A43899718" target="_blank" >RIV/60461373:22310/15:43899718 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61388963:_____/15:00443376 RIV/60461373:22320/15:43899718

Výsledek na webu

<a href="http://www.sciencedirect.com/science/article/pii/S0141391014004236" target="_blank" >http://www.sciencedirect.com/science/article/pii/S0141391014004236</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.polymdegradstab.2014.11.007" target="_blank" >10.1016/j.polymdegradstab.2014.11.007</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Biodegradation of waste PET based copolyesters in thermophilic anaerobic sludge

Popis výsledku v původním jazyce

A series of poly(ethylene terephthalate-co-lactate) copolyesters with random microstructure was prepared from PETP waste beverage bottles and L-lactic acid. Square specimens, sectioned from melt-pressed film, were incubated in thermophilic sludge (55oC, alkaline environment) for 394 days. The biodegradability of the samples, determined from biogas yield, reached 34-69 % depending on the starting aromatic to aliphatic units' ratio. Water uptake study in sludge and abiotic buffers at 55oC showed sharp border around 57% of aromatic units in copolyester composition between polymers susceptible and resistant to both hydrolytic attack by hydrolases and the abiotic hydrolysis. Samples biodegraded in sludge and those abiotically aged in buffers were characterized by 1H NMR, ATR-FTIR, SEC, DSC, and TGA analysis to gain an insight into the chain scission mechanism. Aromatic oligomers as model of copolyester degradation intermediates were prepared and proved to biodegrade in sludge as well.

Název v anglickém jazyce

Biodegradation of waste PET based copolyesters in thermophilic anaerobic sludge

Popis výsledku anglicky

A series of poly(ethylene terephthalate-co-lactate) copolyesters with random microstructure was prepared from PETP waste beverage bottles and L-lactic acid. Square specimens, sectioned from melt-pressed film, were incubated in thermophilic sludge (55oC, alkaline environment) for 394 days. The biodegradability of the samples, determined from biogas yield, reached 34-69 % depending on the starting aromatic to aliphatic units' ratio. Water uptake study in sludge and abiotic buffers at 55oC showed sharp border around 57% of aromatic units in copolyester composition between polymers susceptible and resistant to both hydrolytic attack by hydrolases and the abiotic hydrolysis. Samples biodegraded in sludge and those abiotically aged in buffers were characterized by 1H NMR, ATR-FTIR, SEC, DSC, and TGA analysis to gain an insight into the chain scission mechanism. Aromatic oligomers as model of copolyester degradation intermediates were prepared and proved to biodegrade in sludge as well.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CD - Makromolekulární chemie

OECD FORD obor

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Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název periodika

Polymer Degradation and Stability

ISSN

0141-3910

e-ISSN

—

Svazek periodika

111

Číslo periodika v rámci svazku

neuveden

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

9

Strana od-do

176-184

Kód UT WoS článku

000348949000021

EID výsledku v databázi Scopus

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