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Thermoplastic composites for automotive applications
 Zbončák, Marek ; Pospíšil,, Ladislav (oponent) ; Jančář, Josef (vedoucí práce)
This diploma thesis deals with thermoplastic composites based on PMMA and PC matrix with potentially usage in automotive applications. Glass, carbon and PBO (poly(p-phenylene benzobisoxazole)), with trademark name Zylon®, fibers were used as reinforcement. Lot of expectations was put into PBO fibers based on their tremendous mechanical properties. Effect of fiber volume fraction on tensile modulus, tensile strength and ductility was investigated and experimental data were compared with semi-empirical Halpin-Tsai model. Increasing glass and carbon fiber volume content led to relatively high tensile modulus but tensile strength decreased after specific fiber volume content due to increasing number of defects. PBO fibers showed almost no reinforcing effect. Dynamic mechanic analysis (DMA) served for evaluation of viscoelastic properties of composites. Thermo-gravimetric analysis (TGA), confocal laser scanning microscopy (CLSM) and scanning electron microscopy (SEM) were used to study the structure of composites.
Úplný záznam
Thermoplastic composites for automotive applications
 Zbončák, Marek ; Pospíšil,, Ladislav (oponent) ; Jančář, Josef (vedoucí práce)
This diploma thesis deals with thermoplastic composites based on PMMA and PC matrix with potentially usage in automotive applications. Glass, carbon and PBO (poly(p-phenylene benzobisoxazole)), with trademark name Zylon®, fibers were used as reinforcement. Lot of expectations was put into PBO fibers based on their tremendous mechanical properties. Effect of fiber volume fraction on tensile modulus, tensile strength and ductility was investigated and experimental data were compared with semi-empirical Halpin-Tsai model. Increasing glass and carbon fiber volume content led to relatively high tensile modulus but tensile strength decreased after specific fiber volume content due to increasing number of defects. PBO fibers showed almost no reinforcing effect. Dynamic mechanic analysis (DMA) served for evaluation of viscoelastic properties of composites. Thermo-gravimetric analysis (TGA), confocal laser scanning microscopy (CLSM) and scanning electron microscopy (SEM) were used to study the structure of composites.
Úplný záznam

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