Changes of physical properties of PLA-based blends during early stage of biodegradation in compost
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28110%2F18%3A63520388" target="_blank" >RIV/70883521:28110/18:63520388 - isvavai.cz</a>
Alternative codes found
RIV/70883521:28610/18:63520388
Result on the web
<a href="http://dx.doi.org/10.1016/j.ijbiomac.2018.02.078" target="_blank" >http://dx.doi.org/10.1016/j.ijbiomac.2018.02.078</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.ijbiomac.2018.02.078" target="_blank" >10.1016/j.ijbiomac.2018.02.078</a>
Alternative languages
Result language
angličtina
Original language name
Changes of physical properties of PLA-based blends during early stage of biodegradation in compost
Original language description
Three biodegradable plastics materials, namely pure poly(L-lactide) (PLA), PLA with plasticizer triacetine (TAC) and the mixture PLA/polyhydroxybutyrate (PHB) and TAC were investigated concerning changes of physical properties due to biodegradation in compost at 58 °C up to 16 days. With rising time of degradation in compost, both number and weight molecular masses were decreasing progressively, but only marginal change of the polydispersity index was observed which indicates that biodegradation is not random process. FTIR spectroscopy revealed that in spite of the extensive decrease of molecular weight, no substantial change in chemical composition was found. The most significant modification of the spectra consisted in an appearing of the broad band in region 3100–3300 cm−1, which was assigned to a formation of biofilm on the sample surfaces. This effect appeared for all three materials, however, it was much more pronounced for samples containing also triacetine. Measurement of changes in crystalline portion confirmed that amorphous phase degrades substantially faster compared to crystalline part. The plasticizer triacetine is disappearing also rather fast from the sample resulting besides other effect also in a temporary increase of Tg, which at the beginning grows almost to the value typical for PLA without plasticizer but later the Tg is decreasing due to substantial changes in molecular weight. Generally during composting, the samples keep shape for up to 8 days, after that time the material disintegrates to rough powder.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10404 - Polymer science
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
International Journal of Biological Macromolecules
ISSN
0141-8130
e-ISSN
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Volume of the periodical
113
Issue of the periodical within the volume
Neuveden
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
9
Pages from-to
434-442
UT code for WoS article
000432503100051
EID of the result in the Scopus database
2-s2.0-85042689077