Objemová a entalpická relaxace polymerů
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28110%2F06%3A63505070" target="_blank" >RIV/70883521:28110/06:63505070 - isvavai.cz</a>
Výsledek na webu
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DOI - Digital Object Identifier
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Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Volume and enthalpy relaxation of solid polymers
Popis výsledku v původním jazyce
The presented thesis reports on the experimental investigation of thermally induced structural relaxation (physical aging) of amorphous polymers, and inorganic glasses. The materials studied in this work were polycarbonate, PC, polystyrene, PS, amorphousand semicrystalline poly(ethylene terephthalate), PET, poly(methyl methacrylate), PMMA, PMMA compound with carbon black, and amorphous selenium. Structural relaxation was induced by temperature down and up-jumps. Volume and enthalpy relaxation changes were determined using Differential Scanning Calorimetry (DSC) and Mercury-in-Glass Dilatometry (MIG). The main objective of the work was to find the relationship between the enthalpy change of the aging specimen and the corresponding change in volume. Ingeneral, the relaxed enthalpy vs. relaxed volume plots were straight lines showing a relatively low scattering of the data. From the slopes of these plots, the aging bulk modulus, Ka, which is defined as Ka=(h/v), was
Název v anglickém jazyce
Volume and enthalpy relaxation of solid polymers
Popis výsledku anglicky
The presented thesis reports on the experimental investigation of thermally induced structural relaxation (physical aging) of amorphous polymers, and inorganic glasses. The materials studied in this work were polycarbonate, PC, polystyrene, PS, amorphousand semicrystalline poly(ethylene terephthalate), PET, poly(methyl methacrylate), PMMA, PMMA compound with carbon black, and amorphous selenium. Structural relaxation was induced by temperature down and up-jumps. Volume and enthalpy relaxation changes were determined using Differential Scanning Calorimetry (DSC) and Mercury-in-Glass Dilatometry (MIG). The main objective of the work was to find the relationship between the enthalpy change of the aging specimen and the corresponding change in volume. Ingeneral, the relaxed enthalpy vs. relaxed volume plots were straight lines showing a relatively low scattering of the data. From the slopes of these plots, the aging bulk modulus, Ka, which is defined as Ka=(h/v), was
Klasifikace
Druh
O - Ostatní výsledky
CEP obor
CD - Makromolekulární chemie
OECD FORD obor
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Návaznosti výsledku
Projekt
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Návaznosti
S - Specificky vyzkum na vysokych skolach
Ostatní
Rok uplatnění
2006
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů