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National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Temperature and Time Influence on Crystalline and Amorphous Phase Content in Polypropylene
 Vilč, Ladislav ; Petrůj, Jaroslav (referee) ; Čermák,, Roman (referee) ; Kratochvíla, Jan (advisor)
is is a study of the relationship between structure, mechanical properties and relaxing behavior of the polypropylene. The structure was evaluated by the quantity the solid phase content (SPC). This was defined as mathematical result of free induction decay (FID) signal from pulsed 1H-NMR. The solid phase content is a quite new structural parameter representing the quantity for description of semi-crystalline polymers. Whereas pulsed 1H-NMR is non-destructive, accurate and repeatable, it becomes a unique tool for a description of mechanical, structural, physical-mechanical changes of polypropylene within the time and temperature. Particularly, this method registers the small changes in the time-dependant shipments during secondary crystallization with small structure changes.
Detailed record
Temperature and Time Influence on Crystalline and Amorphous Phase Content in Polypropylene
 Vilč, Ladislav ; Petrůj, Jaroslav (referee) ; Čermák,, Roman (referee) ; Kratochvíla, Jan (advisor)
is is a study of the relationship between structure, mechanical properties and relaxing behavior of the polypropylene. The structure was evaluated by the quantity the solid phase content (SPC). This was defined as mathematical result of free induction decay (FID) signal from pulsed 1H-NMR. The solid phase content is a quite new structural parameter representing the quantity for description of semi-crystalline polymers. Whereas pulsed 1H-NMR is non-destructive, accurate and repeatable, it becomes a unique tool for a description of mechanical, structural, physical-mechanical changes of polypropylene within the time and temperature. Particularly, this method registers the small changes in the time-dependant shipments during secondary crystallization with small structure changes.
Detailed record

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