Detail publikace

Processing stabilization of poly(3-hydroxybutyrate)/poly(lactic acid) blends with oligomeric carbodiimide

MELČOVÁ, V. PŘIKRYL, R. MENČÍK, P. TOCHÁČEK, J.

Originální název

Processing stabilization of poly(3-hydroxybutyrate)/poly(lactic acid) blends with oligomeric carbodiimide

Typ

článek v časopise ve Scopus, Jsc

Jazyk

angličtina

Originální abstrakt

Reactivity of five reactive agents with two biopolyesters, poly(3-hydroxybutyrate) (PHB) and poly(lactic acid) (PLA), was studied in situ during processing in laboratory kneader with simultaneous recording of a melt torque. Among them only Raschig, an oligomeric carbodiimide based additive, was proven to enhance melt viscosity of both. In order to find out the most efficient level of this additive for stabilizing of both polymers and PHB/PLA (70/30 w/w) blend, different concentrations were studied by means of melt torque monitoring, rheology time tests and gel permeation chromatography. Results showed the same trend for neat polymers and their blend. Addition of more than 0.5 % wt. did not have any further positive effect on molecular weight or complex viscosity of the melt. Higher amount is not consumed during the reaction and is left in the sample. Therefore, this amount was used for processing stability studies on PHB/PLA blends by subsequent extrusion cycles. Melt volume-flow rate of extruded samples was obtained and results showed lower values for all stabilized blends comparing to the first extrusion sample of non-stabilized blend. At the same, stability of the blends is secured up to the third extrusion cycle.

Klíčová slova

Poly(3-hydroxybutyrate), poly(lactic acid), carbodiimide, stabilization, reactive extrusion

Autoři

MELČOVÁ, V.; PŘIKRYL, R.; MENČÍK, P.; TOCHÁČEK, J.

Vydáno

4. 1. 2019

Nakladatel

Scientific.net

ISSN

1662-9752

Periodikum

Materials Science Forum

Ročník

955

Číslo

2019

Stát

Švýcarská konfederace

Strany od

7

Strany do

12

Strany počet

6

URL

https://www.scientific.net/MSF.955.7

BibTex

@article{BUT152028,
  author="Veronika {Melčová} and Radek {Přikryl} and Přemysl {Menčík} and Jiří {Tocháček}",
  title="Processing stabilization of poly(3-hydroxybutyrate)/poly(lactic acid) blends with oligomeric carbodiimide",
  journal="Materials Science Forum",
  year="2019",
  volume="955",
  number="2019",
  pages="7--12",
  doi="10.4028/www.scientific.net/MSF.955.7",
  issn="1662-9752",
  url="https://www.scientific.net/MSF.955.7"
}