Publication detail

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

PETRUŠ, J. KUČERA, F. PETRŮJ, J.

Original Title

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

Type

journal article in Web of Science

Language

English

Original Abstract

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).

Keywords

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

Authors

PETRUŠ, J.; KUČERA, F.; PETRŮJ, J.

Released

1. 4. 2016

ISBN

0014-3057

Periodical

European Polymer Journal

Number

77

State

United Kingdom of Great Britain and Northern Ireland

Pages from

16

Pages to

30

Pages count

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"
}