Detail publikačního výsledku
Post-polymerization modification of poly (lactic acid) via radical grafting with itaconic anhydride
PETRUŠ, J.; KUČERA, F.; PETRŮJ, J.
Originální název
Post-polymerization modification of poly (lactic acid) via radical grafting with itaconic anhydride
Anglický název
Post-polymerization modification of poly (lactic acid) via radical grafting with itaconic anhydride
Druh
Článek WoS
Originální abstrakt
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).
Anglický abstrakt
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).
Klíčová slova
Poly(lactic acid), itaconic anhydride, radical grafting.
Klíčová slova v angličtině
Poly(lactic acid), itaconic anhydride, radical grafting.
Autoři
PETRUŠ, J.; KUČERA, F.; PETRŮJ, J.
Rok RIV
2017
Vydáno
01.04.2016
ISSN
0014-3057
Periodikum
EUROPEAN POLYMER JOURNAL
Číslo
77
Stát
Spojené království Velké Británie a Severního Irska
Strany od
16
Strany do
30
Strany počet
15
BibTex
@article{BUT123267,
author="Josef {Petruš} and František {Kučera} and Jaroslav {Petrůj}",
title="Post-polymerization modification of poly (lactic acid) via radical grafting with itaconic anhydride",
journal="EUROPEAN POLYMER JOURNAL",
year="2016",
number="77",
pages="16--30",
doi="10.1016/j.eurpolymj.2016.02.016",
issn="0014-3057"
}