The preparation of 3B-(2-mercaptoethylamino)-cholestane was set as the goal of this thesis project.

The reduction of CO2 emission has been a worldwide mission to resolve global warming predicament. Mesoporous silsesquioxanes, which stabilized by organobridges and has high content aminon absorption site, can serve as a potential CO2 adsorbent. Synthesis of such material is done by hydrolysis and polycondensation of trialkoxysilane. The fastest gelation was observed at reaction in the absence of acids or bases. However, addition of surfactant to the reaction mixture catalyzed formation of silsesquioxanes in acidic media. Obtained materials are strongly hydrophilic and possess a high thermostability. Study of particle size distributions showed that in all cases it was bimodal. The largest particles formed in basic media. Mesoporous silsesquioxanes were obtained from bridged alkyltrimethoxysilanes in the presence of surfactants.

This thesis deals with a preparation of modified polypropylene. Modified polypropylene was prepared by reaction itaconic anhydride and compounds contain primary and secondary amino group (diaminododecane, aminoethylethanolamine and aminoethylpiperazine). Knowledge of radical and condensation modification of polypropylene were summarized in the theoretical part. New application of modified polypropylene ware summarized at the theoretical part as well. In the experimental part polypropylene was functionalized by grafting with itaconic anhydride during reactive extrusion. Extrusion was carried on the co-rotating twin-screw extruder (Brabender 25 DSE L/D = 34) at 230 °C and 30 RPM. Residence time of reactive blend was 3 minutes. The modified polypropylene PP-g-IAH) contained 0.5 wt% of itaconic anhydride. 2,5 dimethyl 2,5bis(tert buthyl-peroxy)hexane (Luperox 101) was used as a radical initiator. A ratio initiator/monomer was 1:0.6 (mol/mol). PP-g-IAH was used for condensation reaction with amino compounds in molar ratios IAH/amine from 1:0,3 to 1:1. This reaction carried out in single screw extruder (Betol 1825 L/D = 39) at 210 °C and 30 RPM. Residence time of reactive blend was 3 minutes. Fourier transform infrared spectroscopy was used for a calculation of reaction conversion and for description of new functional groups in the materials. This analysis confirmed the presence of amide and imide groups in the samples. Influence of amino compounds to polymer crystallinity was studied by differential scanning calorimetry. Termogravimetric analysis focused on thermal stability of prepared samples and changes of thermal stability was observed in dependence of additives amount. The rheological behaviors of modified PP were analyzed by measuring the complex viscosity.

Amino-functionalized organic–inorganic hybrid materials with a narrow distributed nanostructure of 2–4 nm in size were obtained by means of a template-free and non-aqueous procedure. Simultaneous twin polymerization of novel amino group containing twin monomers with 2,2′-spirobi[4H-1,3,2-benzodioxasiline] has been applied for this purpose. The amino groups of the organic–inorganic hybrid material are useful for post derivatization. / Dieser Beitrag ist aufgrund einer (DFG-geförderten) Allianz- bzw. Nationallizenz frei zugänglich.

Amino-functionalized organic–inorganic hybrid materials with a narrow distributed nanostructure of 2–4 nm in size were obtained by means of a template-free and non-aqueous procedure. Simultaneous twin polymerization of novel amino group containing twin monomers with 2,2′-spirobi[4H-1,3,2-benzodioxasiline] has been applied for this purpose. The amino groups of the organic–inorganic hybrid material are useful for post derivatization. / Dieser Beitrag ist aufgrund einer (DFG-geförderten) Allianz- bzw. Nationallizenz frei zugänglich.