Immiscible Polymer Blends: Relationships between Processing Conditions, Morphology, and Mechanical Properties
Research output: Thesis › Master's Thesis
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2023.
Research output: Thesis › Master's Thesis
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TY - THES
T1 - Immiscible Polymer Blends
T2 - Relationships between Processing Conditions, Morphology, and Mechanical Properties
AU - Corbillon Castro, Paula
N1 - no embargo
PY - 2023
Y1 - 2023
N2 - The aim of this research is (i) the generation of different microstructures in polyethylene (PE)/ polyamide (PA) and polyethylene (PE)/ polylactic acid (PLA) immiscible polymer blends using the extrusion technique, by varying temperature profile, extrusion speed and drawing speed; and (ii) analyze the relationship between these morphologies and the resulting mechanical properties. The blends have undergone extrusion processing followed by immediate cooling in a cold-water bath to preserve the microstructure. Furthermore, a two-pair roller system was employed to control the drawing ratio. Through manipulation of the processing conditions, various microstructures were identified, including laminar, microspheres, co-continuous, and fibrillar morphology. The resulting microstructure was shown to affect the mechanical properties significantly. Consequently, the overall material performance can be tailored by varying the blend composition and the processing parameters. Lastly, an attempt has been made to replicate the observed morphology obtained in a polymer blend of virgin grades using a blend of multilayer films, yielding positive outcomes. This finding presents a new avenue for recycling objects composed of diverse materials that were previously unrecyclable through conventional methods.
AB - The aim of this research is (i) the generation of different microstructures in polyethylene (PE)/ polyamide (PA) and polyethylene (PE)/ polylactic acid (PLA) immiscible polymer blends using the extrusion technique, by varying temperature profile, extrusion speed and drawing speed; and (ii) analyze the relationship between these morphologies and the resulting mechanical properties. The blends have undergone extrusion processing followed by immediate cooling in a cold-water bath to preserve the microstructure. Furthermore, a two-pair roller system was employed to control the drawing ratio. Through manipulation of the processing conditions, various microstructures were identified, including laminar, microspheres, co-continuous, and fibrillar morphology. The resulting microstructure was shown to affect the mechanical properties significantly. Consequently, the overall material performance can be tailored by varying the blend composition and the processing parameters. Lastly, an attempt has been made to replicate the observed morphology obtained in a polymer blend of virgin grades using a blend of multilayer films, yielding positive outcomes. This finding presents a new avenue for recycling objects composed of diverse materials that were previously unrecyclable through conventional methods.
KW - Polymer blend
KW - Immiscibility
KW - Recycling
KW - Extrusion
KW - Polymer testing
KW - Microstructure
KW - Morphology
KW - Polyethylene
KW - Polyamide
KW - PLA
KW - EVOH
KW - Multilayer films
KW - Polymermischung
KW - Unmischbarkeit
KW - Recycling
KW - Extrusion
KW - Polymerprüfung
KW - Mikrostruktur
KW - Morphologie
KW - Polyethylen
KW - Polyamid
KW - PLA
KW - EVOH
KW - Mehrschichtfolien
M3 - Master's Thesis
ER -