Publication detail

Real-time monitoring of radical grafting of poly(lactic acid) with itaconic anhydride in melt

PETRUŠ, J. KUČERA, F. CHAMRADOVÁ, I. JANČÁŘ, J.

Original Title

Real-time monitoring of radical grafting of poly(lactic acid) with itaconic anhydride in melt

Type

journal article in Web of Science

Language

English

Original Abstract

Poly(lactic acid) (PLA) was functionalized with itaconic anhydride (IAH) via radical grafting in melt initiated by 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane (L101). The main interest was the real-time monitoring of grafting reaction using oscillatory rheology which was considered as an effective tool for monitoring radical grafting. It was found that low concentration of IAH and high concentration of L101 leads to the high grafting efficiency while further increase of IAH concentration does not lead to the proportional increase of grafting degree due to predomination of β-scission. Nevertheless, high grafting efficiency is accompanied by PLA crosslinking as evidenced from both rheology data. Therefore, 2,6-di-tert-butyl-4-methylphenol (BHT) was applied at different L101/BHT molar ratio with potential to reduce the extent of crosslinking. The effect of BHT was real-time evidenced during the reaction performed by internal mixer and rotational rheometer. The kinetics of the PLA grafting/crosslinking was studied using differential scanning calorimetry (DSC) which confirmed both rheological data and the difference in kinetics parameters for radical reaction with/without BHT. Both techniques proved desired effect of BHT at L101/BHT molar ratio greater than 1/0.5 which makes BHT promising agent for better control of grafting process and suppression of undesired collateral reactions.

Keywords

Radical grafting; Poly(lactic acid); Itaconic anhydride; Crosslinking; Rheology

Authors

PETRUŠ, J.; KUČERA, F.; CHAMRADOVÁ, I.; JANČÁŘ, J.

Released

1. 6. 2018

Publisher

European Polzmer Journal

Location

United Kingdom

ISBN

0014-3057

Periodical

European Polymer Journal

Number

103

State

United Kingdom of Great Britain and Northern Ireland

Pages from

378

Pages to

389

Pages count

12

URL

https://www.sciencedirect.com/science/article/pii/S0014305717319602?via%3Dihub

BibTex

@article{BUT147481,
  author="Josef {Petruš} and František {Kučera} and Ivana {Chamradová} and Josef {Jančář}",
  title="Real-time monitoring of radical grafting of poly(lactic acid) with itaconic anhydride in melt",
  journal="European Polymer Journal",
  year="2018",
  number="103",
  pages="378--389",
  doi="10.1016/j.eurpolymj.2018.04.030",
  issn="0014-3057",
  url="https://www.sciencedirect.com/science/article/pii/S0014305717319602?via%3Dihub"
}