Back to Search
Start Over
Morphology optimization of poly(ethylene terephthalate)/polyamide blends compatibilized via extension-dominated twin-screw extrusion
- Source :
- Journal of Polymer Engineering. 41:218-225
- Publication Year :
- 2021
- Publisher :
- Walter de Gruyter GmbH, 2021.
-
Abstract
- Poly(ethylene terephthalate) (PET) and polyamide (PA) are immiscible polymers, which requires the use of compatibilizers to stabilize the morphology and achieve acceptable property levels. Therefore, controlling the degree of dispersion, especially the size of the disperse PA droplets in the PET matrix is of paramount importance. This study aims to improve the mixing, i.e., minimize PA droplet size, in immiscible and compatibilized PET/PA and PET/Nylon-MXD6 (MXD6) blends by resorting to extension-dominated mixing in twin-screw extrusion (TSE). MXD6 is an aromatic polyamide similar in polarity to PET, so it is expected that it will blend more effectively than is the case with aliphatic nylon-6 and PET. Two screw configurations are used, a benchmark shear-dominated screw with kneading blocks (KBs) in an aggressive configuration, and an extension-dominated screw configuration with static mixers with hyperbolic C–D channels, recently developed by our group, in place of the KBs. The results show that the use of extensional mixing elements (EMEs) in place of KBs results in a significant decrease of both average and maximum droplet size for all blends, and up to more than one order of magnitude between the most extreme cases of the KB-processed immiscible blend and EME-processed compatibilized blends.
- Subjects :
- Materials science
Morphology (linguistics)
Polymers and Plastics
General Chemical Engineering
02 engineering and technology
Compatibilization
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
0104 chemical sciences
chemistry.chemical_compound
chemistry
Polyamide
Materials Chemistry
Extrusion
Composite material
0210 nano-technology
Poly ethylene
Subjects
Details
- ISSN :
- 21910340 and 03346447
- Volume :
- 41
- Database :
- OpenAIRE
- Journal :
- Journal of Polymer Engineering
- Accession number :
- edsair.doi...........acf2beafadbf05a05f3ebcc171bb279d