Plasticizer effect on melt blending of polylactide stereocomplex
Compared to neat PLLA, the melting temperature of the stereocomplex polylactide and its plasticized samples was approximately 55°C higher. Higher plasticizer contents decreased glass...
Plasticizer effect on melt blending of polylactide stereocomplex
Compared to neat PLLA, the melting temperature of the stereocomplex polylactide and its plasticized samples was approximately 55°C higher. Higher plasticizer contents decreased glass transition temperature of the stereocomplex, which implied higher flexibility and enhanced the crystallization rate.
Mixing of Racemic Poly(L-lactide)/Poly(D-lactide) Blend with
Stereocomplex-type polylactide (SC-PLA) consisting of alternatively arranged poly(L-lactide) (PLLA) and poly(D-lactide) (PDLA) chains has gained a good reputation as a sustainable engineering plastic with outstanding heat resistance and durability, however its practical applications have been considerably hindered by the weak SC crystallizability. Current methods used to enhance the SC
Poly (lactic acid) stereocomplexes: A decade of progress
Poly ( l -lactide) [i.e., poly ( l -lactic acid) (PLLA)] is a biodegradable polyester produced from renewable biobased raw materials such as corn-starch and have been utilized in commodity and biomedical applications [1]. Blending PLLA with its enantiomer poly ( d -lactic acid) [i.e., poly ( d -lactic acid) (PDLA)] or the coexistence of PLLA or
Improving Polylactide Toughness by Plasticizing with Low
A synergistic effect of simultaneous plasticization and destructurization of soy protein in melt extrusion is studied using soy meal, glycerol, and urea. The combined effect of plasticization...
- Can poly (ethylene glycol) enhance stereocomplex formation of high molecular weight poly (L-lactide) blends?
- Enhanced formation of stereocomplex crystallites of high molecular weight poly (L-lactide)/Poly (D-lactide) blends from melt by using poly (ethylene glycol) ACS Sustain. Chem.
- What are stereocomplex- and Homo-crystallization behavior of poly(L-lactide)/poly(D-?
- Stereocomplex- and homo-crystallization andphase-transition behavior of relatively high-molecular-weight linear one- and two-armed and star-shaped four-armed poly (L-lactide)/poly (D-lactide) blends Macromol. Chem.
- What is the melt viscosity of PLLA/pdla/30p35 composites at 50 Hz?
- In particular, the melt viscosity of PLLA/PDLA/10PX and PLLA/PDLA/30P35 composites at 50 Hz are as high as 580.1 Pa s and844.1 Pa s, respectively, approximately two orders of magnitude higher than that of the PLLA/PDLA blend (3.9 Pa s).
- Can PLLA/PDLA chain assemblies be destroyed after melting?
- For the PLLA/PDLA binary blend, the PLLA/PDLA chain assembliescould be totally destroyed after melting of SC crystallites pre-generated in the melt blending [ 59, 60 ], thus causing the predominant formation of HCs upon subsequent cooling ( Scheme 1a).
- Can polyethylene glycol (PEG) be used as a plasticizer?
- Meanwhile, low-MW (1000–2000 g/mol) poly (ethylene glycol) (PEG) with lower content (10 wt%)can be used as plasticizer to trigger the exclusive SC crystallization of PLLA/PDLA blends by increasing segmental mobility of PLA chains [ 40] but the migration of the plasticizers could accelerate the product aging.
- Does high-temperature melt-mixing time increase SC crystallite formation?
- It is interesting to find that increasing the high-temperature melt-mixing time gives rise to an apparent enhancement in the adsorbed amount of PLLA/PDLA chains on the PX surface, and therebyfacilitates the formation of more SC crystallites.
