Post-polymerization modification of poly (lactic acid) via radical grafting with itaconic anhydride

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F16%3APU118452" target="_blank" >RIV/00216305:26620/16:PU118452 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1016/j.eurpolymj.2016.02.016" target="_blank" >http://dx.doi.org/10.1016/j.eurpolymj.2016.02.016</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.eurpolymj.2016.02.016" target="_blank" >10.1016/j.eurpolymj.2016.02.016</a>

Result language
angličtina
Original language name
Post-polymerization modification of poly (lactic acid) via radical grafting with itaconic anhydride
Original language description
Poly(lactic acid) (PLA) was functionalized via radical grafting with itaconic anhydride (IAH) in melt. Reaction was initiated using 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane (L101). Experiments were achieved in order to determine the relationship between reaction conditions and grafting yield, whereas different concentrations of IAH (0.5–10 wt %) and L101 (0.1–2 wt %) were used for reaction. Reaction temperature 190 °C (calculated according to Arrhenius equation) guaranteed complete decomposition of L101 upon reaction period 6 min. Grafted IAH onto PLA backbone was proved by infrared spectroscopy (FTIR). Structure analysis also proved IAH isomerization to citraconic anhydride (CAH) which affects monomer reactivity at processing temperature. Homopolymerization of IAH was predicted regarding thermal stability of extracted byproducts compared to poly(itaconic anhydride) (PIAH) prepared by radical polymerization in solution. Acid-base titration proved that amount of grafted IAH increases with increasing IAH and L101 concentrations. However, increasing IAH and L101 concentrations lead to higher extent of undesired reactions which were detected by melt flow rate measuring (MFR).
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/LQ1601" target="_blank" >LQ1601: CEITEC 2020</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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