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Functionalization of Polypropylene by Maleimides
Korčušková, Martina ; Petruš, Josef (oponent) ; Kučera, František (vedoucí práce)
Diploma thesis deals with preparation of polypropylene functionalized by maleimides, based on the reaction between maleic anhydride and amine. The overview of functionalization of polypropylene by maleic anhydride by reactive extrusion and routes for the synthesis and utilization of maleimides are contained in the theoretical part. Samples of maleimide-functionalized polypropylene were prepared by reactive extrusion using low molecular weight amines (aniline and 4-aminophenol) and hight molecular weight polyether monoamines. Functionalized polypropylene samples were prepared by several methods differing in the composition of the reaction mixture and performing a grafting reaction. Appropriate maleamic acids and maleimides were synthesized from low molecular weight amines and further used to functionalize the polypropylene. To characterize the samples, the degree of monomer conversion and melt flow index were determined and further analyses were performed by Fourier transform infrared spectroscopy, differential scanning calorimetry and thermogravimetric analysis. The synthesis of low molecular weight products was further monitored by thin layer chromatography and thermogravimetric analysis with evolved gas analysis.
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Hydrolytická stabilita poly(3-hydroxybutyrátu)
Korčušková, Martina ; Petruš, Josef (oponent) ; Kučera, František (vedoucí práce)
Bakalárska práca sa zaoberá skúmaním hydrolytickej stability poly(3-hydroxybutyrátu) pri hydrolýze v nadbytku vody a pri hydrolytickej degradácii v tavenine. V teoretickej časti práce sú zhrnuté poznatky o priebehu, mechanizme a kinetike hydrolýzy a prehľad ďalších rozkladných reakcii poly(3 hydroxybutyrátu). Experimentálna časť je zameraná na degradáciu poly(3-hydroxybutyrátu) v prítomnosti vody a porovnanie miery hydrolytickej degradácie pri kyslo a alkalicky katalyzovanej reakcii. Na porovnanie rozsahu hydrolýzy v tavenine bola skúmaná hydrolytická degradácia poly(3 hydroxybutyrátu) v extrudéri pri teplote 170 °C. Vzorky boli analyzované na zistenie objemového indexu toku, teploty topenia, stupňa kryštalinity, distribúcie molekulovej hmotnosti a štruktúry poly(3-hydroxybutyrátu) pomocou infračervenej spektroskopie.
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Functionalization of Polypropylene by Maleimides
Korčušková, Martina ; Petruš, Josef (oponent) ; Kučera, František (vedoucí práce)
Diploma thesis deals with preparation of polypropylene functionalized by maleimides, based on the reaction between maleic anhydride and amine. The overview of functionalization of polypropylene by maleic anhydride by reactive extrusion and routes for the synthesis and utilization of maleimides are contained in the theoretical part. Samples of maleimide-functionalized polypropylene were prepared by reactive extrusion using low molecular weight amines (aniline and 4-aminophenol) and hight molecular weight polyether monoamines. Functionalized polypropylene samples were prepared by several methods differing in the composition of the reaction mixture and performing a grafting reaction. Appropriate maleamic acids and maleimides were synthesized from low molecular weight amines and further used to functionalize the polypropylene. To characterize the samples, the degree of monomer conversion and melt flow index were determined and further analyses were performed by Fourier transform infrared spectroscopy, differential scanning calorimetry and thermogravimetric analysis. The synthesis of low molecular weight products was further monitored by thin layer chromatography and thermogravimetric analysis with evolved gas analysis.
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Hydrolytická stabilita poly(3-hydroxybutyrátu)
Korčušková, Martina ; Petruš, Josef (oponent) ; Kučera, František (vedoucí práce)
Bakalárska práca sa zaoberá skúmaním hydrolytickej stability poly(3-hydroxybutyrátu) pri hydrolýze v nadbytku vody a pri hydrolytickej degradácii v tavenine. V teoretickej časti práce sú zhrnuté poznatky o priebehu, mechanizme a kinetike hydrolýzy a prehľad ďalších rozkladných reakcii poly(3 hydroxybutyrátu). Experimentálna časť je zameraná na degradáciu poly(3-hydroxybutyrátu) v prítomnosti vody a porovnanie miery hydrolytickej degradácie pri kyslo a alkalicky katalyzovanej reakcii. Na porovnanie rozsahu hydrolýzy v tavenine bola skúmaná hydrolytická degradácia poly(3 hydroxybutyrátu) v extrudéri pri teplote 170 °C. Vzorky boli analyzované na zistenie objemového indexu toku, teploty topenia, stupňa kryštalinity, distribúcie molekulovej hmotnosti a štruktúry poly(3-hydroxybutyrátu) pomocou infračervenej spektroskopie.
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