Preparation and Properties Analysis of Polypropylene/Biopolymer Blends
| Autor: | Chen-Kai Wang, 王振凱 |
|---|---|
| Rok vydání: | 2015 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 103 This study used 25% starch blend with two type of polypropylene plastic,and the blends were prepared by twin screw extruder. The extruded strands were cut into pellets and injection molded to make test specimens.We examined the use of compatibilizer in influencing the thermal properties, miscibility properties, mechanical properties.These PP/starch blends were further characterized by differential scanning calorimetry(DSC), scanning electron microscope(SEM), thermo gravimetric analysis(TGA),impact test,tensile tests and water absorption tests. It was found that,introduction of starch particles resulted in miscibility and thermal stability are increased and strengthen PP spherulites structure. The scanning electron microscope results indicated that the addition of compatibilizer can increased the allocation of different phases and dispersion and interfacial adhesion of blends. The impact tests and tensile tests results indicated that the addition of starch can decreased the rigidity of PP. Besides,a lower elastic modulus and a higher elongation at break were obtained, which show that the addition of starch would make the rigidity PP to ductile materials. The water absorption tests indicated that the addition of compatibilizer can decreased the water absorption of blends. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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