Formation of Stereocomplex-PLA on technical scale

Saal B
Donnerstag, 14.09.2023, 13:55 - 14:20 Uhr

In the present study, formation of a Stereocomplex-PLA blend on technical scale is thoroughly investigated. The possibility to modify the melt spin process through kinetics is suggested to develop Stereocomplex-PLA-Fibers with technical strengths based on

Lars Bostan et al (Faserinstitut Bremen e.V, Bremen (GER))

Poly(D-lactide) (PDLA) and poly(L-lactide) (PLLA), both available on the market, are blended on technical scale. Using a special process control, the two materials are blended in a twin-screw extruder at a mass throughput rate of 2 kg/h, resulting in a stereocomplex Poly(-lactide) (PLA) blend. Thermal analysis indicates only one melting point at 235 °C. X-ray powder diffraction patterns show characteristic features for the stereocomplex PLA. With the available amount of this blend PLA fibers with technical strengths can be developed in the melt spinning process. The non-existent thermal stability of the scPLA blend can be compensated by modifying the melt spinning process through kinetics. Further research is needed here. As such, the application of the biopolymer PLA can be expanded, leading to substitute the conventional plastics like Polyesther (PES) or Polypropylene (PP) for conserving both the resources and the environment.