Crystallization kinetics and rigidity percolation in glassforming melts I. Avramov, R. Keding, C. Rüssel Otto-Schott-Institut, Universität Jena, Fraunhoferstrasse 6, D-07743, Germany * On leave from the Institute of Physical Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria e-mail: [email protected] Corresponding author. Tel +49-3641 948501; fax +49-3641 948502 e-mail: cai@r...

AlPO4-11 and AlPO4-5 molecular sieves are ionothermally prepared without addition of water by using anhydrous starting materials, such as NH4H2PO4, pseudoboehmite (AlOOH), and NH4F. The synthesis appears to be an autocatalytic process. Water has a remarkable effect on the synthesis process. Addition of reagent quantities of water (H2O/Al = 1, molar ratio) can enhance the crystallization kinetic...

Real-time observations on gold nanorods evolving into spiral or lamellar superlattices are demonstrated. 2D critical nuclei and screw dislocations initiate the crystallization process. Kinetics of the superlattice growth is determined to be similar to that of classical crystal growth, where three basic modes are involved: spiral, layer-by-layer and dendritic.

A systematic experimental investigation of the coupling between extensional flow and crystallization a commercial grade polypropylene is presented. modified Sentmanat device allows one to generate uniaxial in absence gravity sagging monitoring its effect on kinetics via in-situ visualization sample polarised light. As compared shear induced crystallization, three fold increase extension found. ...

Separation of glycols with close boiling points and relatively high viscosity at their melting point is a challenge in the production purity products downstream biorefinery processes. In this work, efficiency layer melt crystallization process acetone as assisting solvent was evaluated for mixture monoethylene glycol 1,2-pentanediol. Solid-liquid equilibrium measured modelled NRTL modified UNIF...

Faster nucleation of hydroxyapatite (HAP) at lower pH (with lower supersaturation) contradicts classical understanding. We find that the residue calcium ion in the mother liquor is the key to trigger ACP phase transformation, which gives an understanding of nonclassical nucleation kinetics of ACP-mediated crystallization and sheds light on biomineralization.

Thermal behavior of palm stearin (PS) and palm olein (PO) was explored by monitoring peak temperature transitions by differential scanning calorimetry (DSC). The fatty acid composition (FAC), isothermal crystallization kinetics studied by pulsed Nuclear Magnetic Resonance (pNMR) and isothermal microstructure were also compared. The results indicated that the fatty acid composition had an import...

*Correspondence: Miroslav Slouf , Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky Sq. 2, 162 06 Prague 6, Czech Republic e-mail: [email protected] We introduce a dynamic sandwich method, which can be used for in situ observation and quantification of polymer crystallization nucleated by micro/nanoparticles. The method was applied on polyoxymethylene (P...

Supereruptions violently transfer huge amounts (100 s-1000 s km(3)) of magma to the surface in a matter of days and testify to the existence of giant pools of magma at depth. The longevity of these giant magma bodies is of significant scientific and societal interest. Radiometric data on whole rocks, glasses, feldspar and zircon crystals have been used to suggest that the Bishop Tuff giant magm...

Driven by molecular affinity and balance in the crystallization kinetics, the ability to co-crystallize dissimilar yet self-crystallizable blocks of a block copolymer (BCP) into a uniform domain may strongly affect its phase diagram. In this study, we synthesize a new series of crystalline and monodisperse all-π-conjugated poly(2,5-dihexyloxy-p-phenylene)-b-poly(3-(2-ethylhexyl)thiophene) (PPP-...