Badania nad syntezą karboksyloalumoksanów i ich wykorzystaniem jako reaktywnych nanonapełniaczy

Marcin Affek

Abstract

In this dissertation the possibility of application of boehmite as reactive filler into numerous polymeric matrixes was investigated. This aim was achieved in two ways. The first technique was based on introduction the polymerization active center of metalorganic character of aluminum-alkyl or aluminum-alkoxide type. Thus synthesized compounds were applied as catalysts towards monomers like -caprolactone, L-lactide and propylene oxide. In direct reactions of boehmite with organoaluminum compounds the active products initiating polymerization of heterocyclic monomers were formed. However the control of polymerization process is limited and the polymer formed is bound to the carrier poorly. Much better results have been obtained when boehmite was prepared in the reaction with p-hydroxybenzoic acid to form the layer of aluminum dicarboxylate prior introduction of metalorganic groups. Further compatibilization of the inorganic composite component by additional introduction of lauric acid residue lead to formation of stable poly(-caprolactone) composite. Alkyl-aluminum derivatives were also applied as methylaluminoxane analogue in the process of stereospecific styrene polymerization of Ziegler-Natta type, but this application is limited by the impurities present in boehmite. The modification of the above described method was the attempt of using boehmite in the ATRP type polymerization. At the grain surface, in the reaction with p-chlorotoluic acid instead of p-hydroxybenzoic acid, the mobile chlorine atoms needed in this process were installed. Thus styrene-encapsulated nanospheres. The other method of introduction nanoparticles into polymeric matrixes was based on transfer of boehmite into carboxylate containing C=C groups capable of classic radical copolymerization with a wide spectra of monomers. The source of unsaturated bounds was the residue groups of acrylic or methacrylic acid incorporated into boehmite in the simple acid-base reaction. Thus the nanocomposites were formed in popular matrixes as polystyrene, poly(methyl methacrylate), poly(vinyl acetate) and poly(vinyl alcohol). The ability of nanocomposite formation is limited by compatibility between the nanofiller surface and polymeric matrix. Obtained compounds were characterized by the means of elemental analysis, FT-IR, NMR or MALDI-ToF spectroscopy as well as SEM, XRD and DLS.
Diploma typeDoctor of Philosophy
Author Marcin Affek (FC)
Marcin Affek,,
- Faculty of Chemistry
Title in PolishBadania nad syntezą karboksyloalumoksanów i ich wykorzystaniem jako reaktywnych nanonapełniaczy
Languagepl polski
Certifying UnitFaculty of Chemistry (FC)
Disciplinechemistry / (chemical sciences domain) / (physical sciences)
Defense Date26-11-2010
Supervisor Zbigniew Florjańczyk (FC / CPCT)
Zbigniew Florjańczyk,,
- Chair Of Polymer Chemistry And Technology

Internal reviewers Antoni Kunicki (FC / DCOC)
Antoni Kunicki,,
- Department Of Catalysis And Organometallic Chemistry
External reviewers Marian Zaborski - [Politechnika Łódzka (PŁ)]
Marian Zaborski,,
-
- Politechnika Łódzka
Pages172
Keywords in Englishxxx
Abstract in EnglishIn this dissertation the possibility of application of boehmite as reactive filler into numerous polymeric matrixes was investigated. This aim was achieved in two ways. The first technique was based on introduction the polymerization active center of metalorganic character of aluminum-alkyl or aluminum-alkoxide type. Thus synthesized compounds were applied as catalysts towards monomers like -caprolactone, L-lactide and propylene oxide. In direct reactions of boehmite with organoaluminum compounds the active products initiating polymerization of heterocyclic monomers were formed. However the control of polymerization process is limited and the polymer formed is bound to the carrier poorly. Much better results have been obtained when boehmite was prepared in the reaction with p-hydroxybenzoic acid to form the layer of aluminum dicarboxylate prior introduction of metalorganic groups. Further compatibilization of the inorganic composite component by additional introduction of lauric acid residue lead to formation of stable poly(-caprolactone) composite. Alkyl-aluminum derivatives were also applied as methylaluminoxane analogue in the process of stereospecific styrene polymerization of Ziegler-Natta type, but this application is limited by the impurities present in boehmite. The modification of the above described method was the attempt of using boehmite in the ATRP type polymerization. At the grain surface, in the reaction with p-chlorotoluic acid instead of p-hydroxybenzoic acid, the mobile chlorine atoms needed in this process were installed. Thus styrene-encapsulated nanospheres. The other method of introduction nanoparticles into polymeric matrixes was based on transfer of boehmite into carboxylate containing C=C groups capable of classic radical copolymerization with a wide spectra of monomers. The source of unsaturated bounds was the residue groups of acrylic or methacrylic acid incorporated into boehmite in the simple acid-base reaction. Thus the nanocomposites were formed in popular matrixes as polystyrene, poly(methyl methacrylate), poly(vinyl acetate) and poly(vinyl alcohol). The ability of nanocomposite formation is limited by compatibility between the nanofiller surface and polymeric matrix. Obtained compounds were characterized by the means of elemental analysis, FT-IR, NMR or MALDI-ToF spectroscopy as well as SEM, XRD and DLS.
Thesis file
Affek.pdf 26.58 MB
Citation count*5 (2020-09-18)

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