-
Je něco špatně v tomto záznamu ?
Changes of physical properties of PLA-based blends during early stage of biodegradation in compost
M. Sedničková, S. Pekařová, P. Kucharczyk, J. Bočkaj, I. Janigová, A. Kleinová, D. Jochec-Mošková, L. Omaníková, D. Perďochová, M. Koutný, V. Sedlařík, P. Alexy, I. Chodák,
Jazyk angličtina Země Nizozemsko
Typ dokumentu časopisecké články
- MeSH
- časové faktory MeSH
- fyzikální jevy MeSH
- hydroxybutyráty chemie MeSH
- kompostování * MeSH
- molekulová hmotnost MeSH
- plastické hmoty chemie MeSH
- polyestery chemie metabolismus MeSH
- Publikační typ
- časopisecké články MeSH
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 16days. 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 3100-3300cm-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 8days, after that time the material disintegrates to rough powder.
Citace poskytuje Crossref.org
- 000
- 00000naa a2200000 a 4500
- 001
- bmc18033306
- 003
- CZ-PrNML
- 005
- 20181008122155.0
- 007
- ta
- 008
- 181008s2018 ne f 000 0|eng||
- 009
- AR
- 024 7_
- $a 10.1016/j.ijbiomac.2018.02.078 $2 doi
- 035 __
- $a (PubMed)29454946
- 040 __
- $a ABA008 $b cze $d ABA008 $e AACR2
- 041 0_
- $a eng
- 044 __
- $a ne
- 100 1_
- $a Sedničková, Michaela $u Polymer Institute, Slovak Academy of Sciences, Dúbravská cesta 9, 845 41 Bratislava, Slovakia.
- 245 10
- $a Changes of physical properties of PLA-based blends during early stage of biodegradation in compost / $c M. Sedničková, S. Pekařová, P. Kucharczyk, J. Bočkaj, I. Janigová, A. Kleinová, D. Jochec-Mošková, L. Omaníková, D. Perďochová, M. Koutný, V. Sedlařík, P. Alexy, I. Chodák,
- 520 9_
- $a 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 16days. 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 3100-3300cm-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 8days, after that time the material disintegrates to rough powder.
- 650 12
- $a kompostování $7 D000076282
- 650 _2
- $a hydroxybutyráty $x chemie $7 D006885
- 650 _2
- $a molekulová hmotnost $7 D008970
- 650 _2
- $a fyzikální jevy $7 D055585
- 650 _2
- $a plastické hmoty $x chemie $7 D010969
- 650 _2
- $a polyestery $x chemie $x metabolismus $7 D011091
- 650 _2
- $a časové faktory $7 D013997
- 655 _2
- $a časopisecké články $7 D016428
- 700 1_
- $a Pekařová, Silvie $u Environmental Protection Engineering, Faculty of Technology, Tomas Bata University in Zlín, Vavrečkova 275, 760 01 Zlín, Czech Republic.
- 700 1_
- $a Kucharczyk, Pavel $u Centre of Polymer Systems, University Institute, Tomas Bata University in Zlín, Třída Tomáše Bati 5678, 760 01 Zlín, Czech Republic.
- 700 1_
- $a Bočkaj, Ján $u Institute of Natural and Synthetic Polymers, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, 812 37 Bratislava, Slovakia.
- 700 1_
- $a Janigová, Ivica $u Polymer Institute, Slovak Academy of Sciences, Dúbravská cesta 9, 845 41 Bratislava, Slovakia.
- 700 1_
- $a Kleinová, Angela $u Polymer Institute, Slovak Academy of Sciences, Dúbravská cesta 9, 845 41 Bratislava, Slovakia.
- 700 1_
- $a Jochec-Mošková, Daniela $u Polymer Institute, Slovak Academy of Sciences, Dúbravská cesta 9, 845 41 Bratislava, Slovakia.
- 700 1_
- $a Omaníková, Leona $u Institute of Natural and Synthetic Polymers, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, 812 37 Bratislava, Slovakia.
- 700 1_
- $a Perďochová, Dagmar $u Institute of Natural and Synthetic Polymers, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, 812 37 Bratislava, Slovakia.
- 700 1_
- $a Koutný, Marek $u Environmental Protection Engineering, Faculty of Technology, Tomas Bata University in Zlín, Vavrečkova 275, 760 01 Zlín, Czech Republic.
- 700 1_
- $a Sedlařík, Vladimír $u Centre of Polymer Systems, University Institute, Tomas Bata University in Zlín, Třída Tomáše Bati 5678, 760 01 Zlín, Czech Republic.
- 700 1_
- $a Alexy, Pavol $u Institute of Natural and Synthetic Polymers, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, 812 37 Bratislava, Slovakia.
- 700 1_
- $a Chodák, Ivan $u Polymer Institute, Slovak Academy of Sciences, Dúbravská cesta 9, 845 41 Bratislava, Slovakia. Electronic address: Ivan.Chodak@savba.sk.
- 773 0_
- $w MED00002295 $t International journal of biological macromolecules $x 1879-0003 $g Roč. 113, č. - (2018), s. 434-442
- 856 41
- $u https://pubmed.ncbi.nlm.nih.gov/29454946 $y Pubmed
- 910 __
- $a ABA008 $b sig $c sign $y a $z 0
- 990 __
- $a 20181008 $b ABA008
- 991 __
- $a 20181008122642 $b ABA008
- 999 __
- $a ok $b bmc $g 1339419 $s 1030300
- BAS __
- $a 3
- BAS __
- $a PreBMC
- BMC __
- $a 2018 $b 113 $c - $d 434-442 $e 20180215 $i 1879-0003 $m International journal of biological macromolecules $n Int J Biol Macromol $x MED00002295
- LZP __
- $a Pubmed-20181008