Detail publikace

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

PETRUŠ, J. KUČERA, F. PETRŮJ, J.

Originální název

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

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).

Klíčová slova

Poly(lactic acid), itaconic anhydride, radical grafting.

Autoři

PETRUŠ, J.; KUČERA, F.; PETRŮJ, J.

Vydáno

1. 4. 2016

ISSN

0014-3057

Periodikum

European Polymer Journal

Číslo

Stát

Spojené království Velké Británie a Severního Irska

Strany od

Strany do

Strany počet

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"
}