The effect of pre-set extension on the degree of hydrolytic degradation in multicomponent polyurethane elastomers

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F17%3A00474995" target="_blank" >RIV/61389013:_____/17:00474995 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.polymdegradstab.2017.05.033" target="_blank" >http://dx.doi.org/10.1016/j.polymdegradstab.2017.05.033</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.polymdegradstab.2017.05.033" target="_blank" >10.1016/j.polymdegradstab.2017.05.033</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The effect of pre-set extension on the degree of hydrolytic degradation in multicomponent polyurethane elastomers

Popis výsledku v původním jazyce

The impact of pre-set extension on the degree of hydrolytic degradation in all-aliphatic polyurethane (PU) films was tested in phosphate-buffered saline (PBS) for a period of up to 12 months. The PUs were synthesized from polycarbonate-based macrodiol (MD), diisocyanate-1,6-hexane (HDI), butane-1,4-diol (BD) and d,l-lactide-based oligomeric diol (DLL). Macrodiol with molecular weights of ~2800 Da, three DLL oligomers (~400, 660 and 850 Da) and three MD-to-BD-to-DLL molar ratios were chosen for PU synthesis. The isocyanate-to-total-hydroxyl-group ratio was kept constant at 1.05. The functional properties of raw polyurethane films and the samples immersed for 1, 3, 6, 9 and 12 months in a model physiological environment (37 °C, pH = 7.4) were studied. The pre-set extension varied from 20 up to 150% and was applied on PUs with or without any DLL. The given pre-set strain had only slight – but varying – influence on the extent of the hydrolytic process, compared to the non-extended analogues. In samples that underwent efficient orientation and crystallization under strain (three-component PU and PU containing DLL ca. 400 Da), the degradation process was slightly inhibited compared with that of the unstrained analogues. If the systems were composed of sequences not capable of efficient crystallization under strain (PUs containing DLL ca. 660 and 850 Da), then the hydrolytic degradation of the pre-strained samples was accelerated. The observed changes in the functional properties of the mechanically strained PU materials subjected to the long-term hydrolytic process under physiology-mimicking conditions are important for potential medical, package coating, and film applications.

Název v anglickém jazyce

The effect of pre-set extension on the degree of hydrolytic degradation in multicomponent polyurethane elastomers

Popis výsledku anglicky

The impact of pre-set extension on the degree of hydrolytic degradation in all-aliphatic polyurethane (PU) films was tested in phosphate-buffered saline (PBS) for a period of up to 12 months. The PUs were synthesized from polycarbonate-based macrodiol (MD), diisocyanate-1,6-hexane (HDI), butane-1,4-diol (BD) and d,l-lactide-based oligomeric diol (DLL). Macrodiol with molecular weights of ~2800 Da, three DLL oligomers (~400, 660 and 850 Da) and three MD-to-BD-to-DLL molar ratios were chosen for PU synthesis. The isocyanate-to-total-hydroxyl-group ratio was kept constant at 1.05. The functional properties of raw polyurethane films and the samples immersed for 1, 3, 6, 9 and 12 months in a model physiological environment (37 °C, pH = 7.4) were studied. The pre-set extension varied from 20 up to 150% and was applied on PUs with or without any DLL. The given pre-set strain had only slight – but varying – influence on the extent of the hydrolytic process, compared to the non-extended analogues. In samples that underwent efficient orientation and crystallization under strain (three-component PU and PU containing DLL ca. 400 Da), the degradation process was slightly inhibited compared with that of the unstrained analogues. If the systems were composed of sequences not capable of efficient crystallization under strain (PUs containing DLL ca. 660 and 850 Da), then the hydrolytic degradation of the pre-strained samples was accelerated. The observed changes in the functional properties of the mechanically strained PU materials subjected to the long-term hydrolytic process under physiology-mimicking conditions are important for potential medical, package coating, and film applications.

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

2017

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

142

Číslo periodika v rámci svazku

August

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

10

Strana od-do

69-78

Kód UT WoS článku

000408183300008

EID výsledku v databázi Scopus

2-s2.0-85019997864