Evaluation of the glycerolysis process and valorisation of recovered polyol in polyurethane synthesis

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F19%3A00503740" target="_blank" >RIV/61389013:_____/19:00503740 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S1381514818310885?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1381514818310885?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.reactfunctpolym.2019.03.012" target="_blank" >10.1016/j.reactfunctpolym.2019.03.012</a>

Result language
angličtina
Original language name
Evaluation of the glycerolysis process and valorisation of recovered polyol in polyurethane synthesis
Original language description
In this study, the glycerolysis of polyurethane (PU) foam and the applicability of obtained glycerolysate (GLY) for cast PUs were investigated. It was found that crude glycerine with purity grade of 84% might be successfully used for the glycerolysis. The optimal conditions were determined as follows: reaction time of 60 min at 220 °C using dibutyltin dilaurate catalyst (0.5%). Moreover, the purification of GLY by means of liquid-liquid extraction and distillation was also adapted. nCast PUs based on GLY were prepared using a two-step method, during which a prepolymer was first synthesised from a mixture of virgin polyol, GLY and 4, 4′-diphenylmethane diisocyanate (MDI). The prepolymer was then extended with a chain extender, 1, 4-butanediol or 1, 3-propanediol. The effect of virgin polyol replacement by GLY (up to 75%) on thermal and mechanical properties of the cast PUs was determined. The PUs based on GLY exhibited slightly lower thermal stability, higher storage modulus and higher glass transition temperature than the neat PU. The tensile strength of all prepared PUs was beneficially high (12–15 MPa), while the elongation at break decreased with the increasing GLY content probable due to the branching of PU chains.
Czech name
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Czech description
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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

Project
<a href="/en/project/LO1507" target="_blank" >LO1507: Polymers for Advanced Technologies and a Better Quality of Life</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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