Wheat B-starch based polymeric materials
Kotek, Jiří; Kruliš, Zdeněk; Šárka, E.
2011 - English The contribution is aimed at preparation of a thermoplastic material derived from the wheat B-starch. Two ways have been followed, namely blending of the starch with poly(ε-caprolactone) (PCL) and plasticizing of the starch. In both cases, properties of the materials based on the B-starch are comparable to analogous materials based on the A-starch. The prepared materials have potential application as biodegradable films for agriculture. Keywords: biodegradable plastic; polycaprolactone; B-starch Available at various institutes of the ASCR Wheat B-starch based polymeric materials

The contribution is aimed at preparation of a thermoplastic material derived from the wheat B-starch. Two ways have been followed, namely blending of the starch with poly(ε-caprolactone) (PCL) and ...

Kotek, Jiří; Kruliš, Zdeněk; Šárka, E.
Ústav makromolekulární chemie, 2011

Hybrid structures based on montmorillonite/modified starch intercalate
Duchek, P.; Špírková, Milena
2010 - English Intercalates based on several commercial cationized starches with degree of substitution D=0.04-0.17, and sodium montmorillonite were prepared. The XRD analyses of resulting organic/inorganic hybrids proved that modification in the starch structure leads to embedding the polycation into montmorillonite clay gallery. Lower degree of starch cationization results in bigger enlargement of the interlayer space in the hybrid structure. Keywords: organic/inorganic hybrides; montmorillonite Available at various institutes of the ASCR Hybrid structures based on montmorillonite/modified starch intercalate

Intercalates based on several commercial cationized starches with degree of substitution D=0.04-0.17, and sodium montmorillonite were prepared. The XRD analyses of resulting organic/inorganic hybrids ...

Duchek, P.; Špírková, Milena
Ústav makromolekulární chemie, 2010

Vliv struktury materiálu na chemickou recyklaci polyurethanu při mikrovlnném ohřevu
Prokop, Jiří; Beneš, Hynek; Kruliš, Zdeněk; Mikešová, Jana; Kříž, Jaroslav
2010 - Czech Keywords: microwave heating; glycolysis; recycling Available at various institutes of the ASCR Vliv struktury materiálu na chemickou recyklaci polyurethanu při mikrovlnném ohřevu

Prokop, Jiří; Beneš, Hynek; Kruliš, Zdeněk; Mikešová, Jana; Kříž, Jaroslav
Ústav makromolekulární chemie, 2010

Novel nanocomposite materials for power engineering
Boček, J.; Matějka, Libor; Mentlík, V.
2010 - English The epoxy-POSS nanocomposites were prepared and their electrical/dielectric and thermomechanical properties were determined. The mono- and octa-epoxyfunctionalized POSS (POSS,E1 and POSS,E8) were covalently incorporated in the epoxy network matrix DGEBA- 3,3’-dimethyl-4,4’-diaminocyclohexylmethane (Laromin C260) as pendant units or as polyhedral junctions, respectively. While the POSS junctions are well dispersed in the hybrid network DGEBA-Laromin-POSS,E8, the pendant POSS aggregate to form large crystalline POSS domains. Keywords: nanocomposite; epoxy resin; insulating system Available at various institutes of the ASCR Novel nanocomposite materials for power engineering

The epoxy-POSS nanocomposites were prepared and their electrical/dielectric and thermomechanical properties were determined. The mono- and octa-epoxyfunctionalized POSS (POSS,E1 and POSS,E8) were ...

Boček, J.; Matějka, Libor; Mentlík, V.
Ústav makromolekulární chemie, 2010

Nízkoenergetický způsob recyklace polyurethanového odpadu
Beneš, Hynek; Kruliš, Zdeněk; Hájek, Milan; Holler, Petr; Látalová, Petra; Prokop, Jiří
2010 - Czech Keywords: polyurethane waste; recycling; microwave Available at various institutes of the ASCR Nízkoenergetický způsob recyklace polyurethanového odpadu

Beneš, Hynek; Kruliš, Zdeněk; Hájek, Milan; Holler, Petr; Látalová, Petra; Prokop, Jiří
Ústav makromolekulární chemie, 2010

Cation and anion exchangers from nanofibrous polystyrene for fast water treatment
Marek, J.; Beneš, Milan J.; Jelínek, L.
2009 - English Strongly acidic sulfonovaný cation exchanger on polystyrene nanofibrous matrix (Nanospider TM technology) was prepared by simultaneous sulfonation and crosslinking. Weakly basic nanofibrous anion exchanger was prepared after transformation of sulfogroups to sulfochloride by reaction with ethylene diamine. Nanofibrous products were characterized by sorption capacity. They have sorption kinetic significantly faster in comparison with standard granular ion exchangers. Současnou sulfonací a síťováním byl připraven silně kyselý sulfonový katex na polystyrenové nanovláknité matrici (Nanospider TM technologie). Slabě bázický anex byl připraven po převedení sulfoskupin na sulfochlorid reakci s ethylen diaminem. Nanovláknité produkty byly charakterizovány pomocí sorpční kapacity. Mají kinetiku sorpce výrazně rychlejší než standardní sorbenty granulární. Keywords: polystyrene; nanofiber; ion exchanger Available at various institutes of the ASCR Cation and anion exchangers from nanofibrous polystyrene for fast water treatment

Strongly acidic sulfonovaný cation exchanger on polystyrene nanofibrous matrix (Nanospider TM technology) was prepared by simultaneous sulfonation and crosslinking. Weakly basic nanofibrous anion ...

Marek, J.; Beneš, Milan J.; Jelínek, L.
Ústav makromolekulární chemie, 2009

Self-assembled nanostructures in copolymer blends: SAXS, SANS and TEM study
Holoubek, Jaroslav; Baldrian, Josef; Hromádková, Jiřina; Steinhart, Miloš
2009 - English Phenomena associated with the phase behaviour and self-assembled nanostructures of three block copolymer systems have been studied by small-angle X-ray scattering (SAXS), small-angle neutron scattering (SANS) and transmision electron microscopy (TEM) Keywords: total hip replacement; polyethylene wear; aseptic loosening Available at various institutes of the ASCR Self-assembled nanostructures in copolymer blends: SAXS, SANS and TEM study

Phenomena associated with the phase behaviour and self-assembled nanostructures of three block copolymer systems have been studied by small-angle X-ray scattering (SAXS), small-angle neutron ...

Holoubek, Jaroslav; Baldrian, Josef; Hromádková, Jiřina; Steinhart, Miloš
Ústav makromolekulární chemie, 2009

Surface properties of polyethylene grafted by plasma
Novák, I.; Nedelčev, T.; Krupa, I.; Števiar, M.; Chodák, I.; Mosnáček, J.; Špírková, Milena; Chehimi, M. M.
2008 - English The aim of the paper is an investigation of surface properties of the polyethylene modified by radio-frequency discharge plasma as well as of the polymer modified by plasma and subsequently grafted with alkoxyvinylsilanes. Cílem tohoto příspěvku je studium povrchových vlastností polyethylenu modifikovaného radiofrekvenčním plasmovým výbojem a plasmou modifikovaného polymeru s naroubovanými alkoxyvinylsilany. Keywords: polyethylene; surface properties Available at various institutes of the ASCR Surface properties of polyethylene grafted by plasma

The aim of the paper is an investigation of surface properties of the polyethylene modified by radio-frequency discharge plasma as well as of the polymer modified by plasma and subsequently grafted ...

Novák, I.; Nedelčev, T.; Krupa, I.; Števiar, M.; Chodák, I.; Mosnáček, J.; Špírková, Milena; Chehimi, M. M.
Ústav makromolekulární chemie, 2008

Membránové technologie a materiály pro separace i alternativní energetické a biospecifické zdroje
Bleha, Miroslav
2008 - Czech Membránové procesy jsou součástí potravinářských, chemických, energetických i ekologických technologií. Membránové procesy jsou součástí potravinářských, chemických, energetických i ekologických technologií. Materiálový výzkum membrán se řadí mezi současný trend nanotechnologií jak pojetím morfologické struktury tak chemickou funkcionalizací výchozích látek. Uvedeny jsou perspektivní směry membránových aplikací. Membrane processes are branches of food, chemical, power and ecological technologies. Membrane material research is in unity with a contemporary trend of nanotechnologies by both the approach to morphology and chemical functionalization of initial compounds. Advanced ways of membrane applications are presented. Keywords: membrane separation; heterogeneous membranes Available at various institutes of the ASCR Membránové technologie a materiály pro separace i alternativní energetické a biospecifické zdroje

Membránové procesy jsou součástí potravinářských, chemických, energetických i ekologických technologií. Membránové procesy jsou součástí potravinářských, chemických, energetických i ekologických ...

Bleha, Miroslav
Ústav makromolekulární chemie, 2008

Metal organophosphonates and their intercalation compounds as inorganic-organic hydrid materials and nanomaterials
Zima, Vítězslav; Svoboda, Jan; Melánová, Klára; Beneš, L.
2008 - English We prepared several new phenylphosphonates and 4-carboxyphenylphosphonates of alkaline earth metals and copper and characterized them by powder X-ray diffraction, thermogravimetric analysis, energy-dispersive X-ray analysis, elemental analysis and infrared spectroscopy. For four of these compounds, their structure was determined from their powder X-ray diffraction patterns using an ab initio FOX program. The prepared alkaline-earth phenylphosphonates with general formula MeC6H5PO3yH2O (Me = Ca, Sr, Ba) were found to be suitable hosts for intercalation reactions. Připravili jsme několik nových fenylfosfonátů a 4-karboxyfenylfosfonátů kovů alkalických zemin a mědi a charakterizovali je pomocí práškové rentgenové difrakce, termogravimetrické analýzy, EDX, elem. analýzy a infračervené spektroskopie. Byla určena struktura čtyřech těchto sloučenin pomocí ab initio programu FOX z práškových rtg. dat. Připravené fenylfosfonáty alkalických kovů se ukázaly být vhodnými hostitelskými materiály pro interkalační reakce. Keywords: intercalation Available at various institutes of the ASCR Metal organophosphonates and their intercalation compounds as inorganic-organic hydrid materials and nanomaterials

We prepared several new phenylphosphonates and 4-carboxyphenylphosphonates of alkaline earth metals and copper and characterized them by powder X-ray diffraction, thermogravimetric analysis, ...

Zima, Vítězslav; Svoboda, Jan; Melánová, Klára; Beneš, L.
Ústav makromolekulární chemie, 2008