Polymer Compositions of Poly(3-Hydroxybutyrate) with an Aliphatic Polyurethane Modifier

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28610%2F24%3A63586158" target="_blank" >RIV/70883521:28610/24:63586158 - isvavai.cz</a>

Výsledek na webu

<a href="http://hdl.handle.net/10563/54638" target="_blank" >http://hdl.handle.net/10563/54638</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Polymer Compositions of Poly(3-Hydroxybutyrate) with an Aliphatic Polyurethane Modifier

Popis výsledku v původním jazyce

Due to the growing interest in biopolymers, biosynthesizable and biodegradable polymers currently occupy a special place. Unfortunately, the properties of native polymers are not satisfactory, so attempts are made to modify them in a tailored manner. The well-known biopolymer - poly(3-hydroxybutyrate), P3HB, is also subject to modifications to eliminate its disadvantages, i.e. stiffness and brittleness, and, above all, low thermal stability, only slightly higher than its melting point. In this work, an attempt was made to improve the properties of P3HB using linear aliphatic polyurethane (PU) synthesized using 1,4-butanediol and 1,6-hexamethylene diisocyanate. The tests carried out on the influence of the amount of polyurethane used (5, 10, 15 and 20% by mass) on the mechanical properties of polymer compositions showed an increase in tensile strength, relative stress at break and impact strength, as well as a decrease in hardness. The introduction of PU increases the thermal stability of the P3HB-PU compositions compared to native P3HB, and the difference between the melting point and the degradation temperature of most of the obtained polymer compositions is above 100°C. In turn, analysis of the thermal properties of the produced polymer compositions by differential scanning calorimetry (DSC) showed a decrease in the glass transition temperature and the degree of crystallinity. The P3HB-PU compositions containing the lowest amount of aliphatic linear polyurethane has the best mechanical and thermal properties.

Název v anglickém jazyce

Polymer Compositions of Poly(3-Hydroxybutyrate) with an Aliphatic Polyurethane Modifier

Popis výsledku anglicky

Due to the growing interest in biopolymers, biosynthesizable and biodegradable polymers currently occupy a special place. Unfortunately, the properties of native polymers are not satisfactory, so attempts are made to modify them in a tailored manner. The well-known biopolymer - poly(3-hydroxybutyrate), P3HB, is also subject to modifications to eliminate its disadvantages, i.e. stiffness and brittleness, and, above all, low thermal stability, only slightly higher than its melting point. In this work, an attempt was made to improve the properties of P3HB using linear aliphatic polyurethane (PU) synthesized using 1,4-butanediol and 1,6-hexamethylene diisocyanate. The tests carried out on the influence of the amount of polyurethane used (5, 10, 15 and 20% by mass) on the mechanical properties of polymer compositions showed an increase in tensile strength, relative stress at break and impact strength, as well as a decrease in hardness. The introduction of PU increases the thermal stability of the P3HB-PU compositions compared to native P3HB, and the difference between the melting point and the degradation temperature of most of the obtained polymer compositions is above 100°C. In turn, analysis of the thermal properties of the produced polymer compositions by differential scanning calorimetry (DSC) showed a decrease in the glass transition temperature and the degree of crystallinity. The P3HB-PU compositions containing the lowest amount of aliphatic linear polyurethane has the best mechanical and thermal properties.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

10404 - Polymer science

Projekt

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Návaznosti

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Rok uplatnění

2024

Kód důvěrnosti údajů

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