Original title: Polypropylen s řízenou dobou života
Translated title: Controlled life-time polypropylene
Authors: Demková, Eva ; Petruš, Josef (referee) ; Tocháček, Jiří (advisor)
Document type: Master’s theses
Year: 2017
Language: slo
Publisher: Vysoké učení technické v Brně. Fakulta chemická
Abstract: [slo] [eng]
Táto diplomová práca sa zameriava na charakterizáciu degradačného procesu polypropylénu a polypropylénu s štatistickým kopolymérom, do ktorých bol pridaný stearát manganatý a stearát kobaltnatý v množstve 0,05; 0,10 a 0,20 hm. %. Cieľom práce bolo vytvoriť polypropylén s riadenou dobou životnosti. Degradácia bola sledovaná v závislosti na dobe expozície a obsahu prodegradantov. Používané prodegradanty boli syntetizované a charakterizované pomocou FTIR a DSC. Počas degradácie vzoriek boli sledované zmeny kryštalinity, teplôt topenia a indexu toku taveniny. Pevnosť v ťahu a ďalšie mechanické vlastnosti boli zistené ťahovou skúškou. Pomocou FTIR bol stanovený karbonylový index. Test termooxidačnej stability bol použitý na určenie aktivačných energií reakcií. Metódou SEM boli sledované zmeny v morfológií degradovaných vzoriek. The master´s thesis is focused on the characterization of degradation process of polypropylene and polypropylene with statistic copolymer into which manganese (II) stearate and cobalt (II) stearates were added at 0.05, 0.10 and 0.20 wt.% loadings. The aim of the thesis was to prepare the controlled life-time polypropylene. The degradation was studied at varying temperatures and prodegradant loadings. The prodegradants were synthetized and characterized using the FTIR and DSC techniques. Thermooxidation of the tested samples induced the changes in crystallinity, melting points and melt-flow indexes. Tensile strength and other mechanical properties were determined by means of the tensile test. The carbonyl index was determined using FTIR, the thermooxidation stability test was used to determine the activation energies of reactions. The changes in morphology of degraded samples were observed by SEM analysis.
Keywords: activation energy; carbonyl index; degradation; Polypropylene; prodegradants; tensile test

Institution: Brno University of Technology (web)
Document availability information: Fulltext is available in the Brno University of Technology Digital Library.
Original record: http://hdl.handle.net/11012/64808

Permalink: http://www.nusl.cz/ntk/nusl-295673


The record appears in these collections:
Universities and colleges > Public universities > Brno University of Technology
Academic theses (ETDs) > Master’s theses