Biodegradation of polyurethane‐polyhydroxybutyrate elastomeric composite investigated from morphological and structural viewpoint

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F19%3APU128971" target="_blank" >RIV/00216305:26620/19:PU128971 - isvavai.cz</a>

Výsledek na webu

<a href="https://onlinelibrary.wiley.com/doi/full/10.1002/app.46909" target="_blank" >https://onlinelibrary.wiley.com/doi/full/10.1002/app.46909</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/app.46909" target="_blank" >10.1002/app.46909</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Biodegradation of polyurethane‐polyhydroxybutyrate elastomeric composite investigated from morphological and structural viewpoint

Popis výsledku v původním jazyce

Morphological, structural, and tensile changes of polyurethane‐poly(3‐hydroxybutyrate) (PU‐PHB) elastomeric composites were evaluated after accelerated test in standard compost media. Size of PHB particles together with their uniform dispersion in the matrix were found to be key parameters for material's resistivity against degradation media. PU‐PHB composite films were synthesized by the “green” solvent free method, where commercially available PHB (PHB‐COM) and PHB produced by bacterium Cupriavidus necator H16 (PHB‐BUT) were both used in the amount of 1, 5, and 10 wt % in composites. Scanning electron microscopy revealed excellent dispersion of PHB‐COM microparticles in the PU matrix resulting in negligible weight losses of the material (max 0.7 wt %). On the contrary, PHB‐BUT particles were agglomerated which promoted partial degradation of the material (max 3.3 wt % loss) manifested by holes on the surface but without severe damage (e.g. fragmentation). Structural analysis confirmed lower crystallinity and less ordered crystalline phase of PHB after the degradation test, particularly in composites made of PHB‐BUT. Moreover, the materials were less stiff after the composting test, but beneficial with higher elongation at break. Such properties are favorable for the use of renewable PHB in the current industrial applications of PU elastomers. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46909.

Název v anglickém jazyce

Biodegradation of polyurethane‐polyhydroxybutyrate elastomeric composite investigated from morphological and structural viewpoint

Popis výsledku anglicky

Morphological, structural, and tensile changes of polyurethane‐poly(3‐hydroxybutyrate) (PU‐PHB) elastomeric composites were evaluated after accelerated test in standard compost media. Size of PHB particles together with their uniform dispersion in the matrix were found to be key parameters for material's resistivity against degradation media. PU‐PHB composite films were synthesized by the “green” solvent free method, where commercially available PHB (PHB‐COM) and PHB produced by bacterium Cupriavidus necator H16 (PHB‐BUT) were both used in the amount of 1, 5, and 10 wt % in composites. Scanning electron microscopy revealed excellent dispersion of PHB‐COM microparticles in the PU matrix resulting in negligible weight losses of the material (max 0.7 wt %). On the contrary, PHB‐BUT particles were agglomerated which promoted partial degradation of the material (max 3.3 wt % loss) manifested by holes on the surface but without severe damage (e.g. fragmentation). Structural analysis confirmed lower crystallinity and less ordered crystalline phase of PHB after the degradation test, particularly in composites made of PHB‐BUT. Moreover, the materials were less stiff after the composting test, but beneficial with higher elongation at break. Such properties are favorable for the use of renewable PHB in the current industrial applications of PU elastomers. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46909.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10404 - Polymer science

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)

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

Journal of Applied Polymer Sciences

ISSN

0021-8995

e-ISSN

1097-4628

Svazek periodika

136

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

8

Strana od-do

„46909-1“-„46909-8“

Kód UT WoS článku

000450307600011

EID výsledku v databázi Scopus

2-s2.0-85052473529