The Influence of Multiple Extrusions on the Properties of High Filled Polylactide/Multiwall Carbon Nanotube Composites

被引：6
|
作者：
Kaczor, Daniel [1 ,2 ]
Bajer, Krzysztof [1 ]
Raszkowska-Kaczor, Aneta [1 ]
Domek, Grzegorz [2 ]
Madajski, Piotr [3 ]
Szroeder, Pawel [4 ]
机构：
[1] Lukasiewicz Res Network, Inst Engn Polymer Mat & Dyes, Marii Sklodowskiej Curie 55, PL-87100 Torun, Poland
[2] Kazimierz Wielki Univ, Fac Mechatron, Kopern 1, PL-85074 Bydgoszcz, Poland
[3] Nicolaus Copernicus Univ, Fac Chem, Gagarina 7, PL-87100 Torun, Poland
[4] Kazimierz Wielki Univ, Inst Phys, Powstancow Wielkopolskich 2, PL-85090 Bydgoszcz, Poland
来源：
MATERIALS | 2022年 / 15卷 / 24期
关键词：
poly(lactic acid); multiwall carbon nanotubes; composites; single-screw extruder; twin-screw extruder; polymer crystallinity; melting flow index; multiple extrusion; MECHANICAL-PROPERTIES; MORPHOLOGY; PLA; DISPERSION;
D O I：
10.3390/ma15248958
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
High filled polylactide/multiwall carbon nanotube composites were subjected to multiple extrusions using single-screw and twin-screw extruders. Samples of the processed composites were characterized by SEM, XRD, Raman, and FTIR spectroscopy. Thermal and rheological properties were investigated by DSC and MFR analyses. Subsequent extrusions resulted in decreased torque and process efficiency, which is a consequence of the viscosity reduction of PLA. Thermal and rheological properties of composites changed after each extrusion as well. As revealed by DSC analyses, cold crystallization temperature showed a tendency to decrease after each process, whereas cold crystallization enthalpy Delta Hcc increased significantly. Melt flow rate, which is indicative of the polymer degradation, increased after each extrusion.
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页数：16
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