Irganox 1010 stabilized PE was monitored by carbonyl build-up and DSC under oxygen. A scheme for PE stabilization by phenols was implemented and its kinetic parameters were calculated from experimental results. This model was validated from its ability to simulate kinetics curves for carbonyl build up, induction period changes with stabilizer concentration, and stabilizer depletion curve in the...

Adhesion promoting monomers — 5(4-vinylbenzyl) -2-thiobarbituric acid (5VS) , 9,10-epithiodecyl methacrylate (EP8MA) , 9,10-epithiodecyl 4-vinylbenzoate (EP8VB) , and 3,4-epithiobutyl 2,2-bis (methacryloyloxymethyl) propionate (EP2BMA) — were added to the MMA liquid of a MMA-PMMA/TBBO resin. Three dental precious metal alloys were butt-jointed together with the MMA-PMMA/TBBO adhesive resin, and...

Adhesion promoting monomers -5-(4-vinylbenzyl)-2-thiobarbituric acid (5VS), 9,10-epithiodecyl methacrylate (EP8MA), 9,10-epithiodecyl 4-vinylbenzoate (EP8VB), and 3,4-epithiobutyl 2,2-bis(methacryloyloxymethyl)propionate (EP2BMA)--were added to the MMA liquid of a MMA-PMMA/TBBO resin. Three dental precious metal alloys were butt-jointed together with the MMA-PMMA/TBBO adhesive resin, and tensil...

Surface crystallization in fine powder Se70Te30 chalcogenide glass was studied by differential scanning calorimetry (DSC) and optical microscopy. A complex kinetic analysis of these experimental data reveals that the contracting sphere mechanism (R3 model) is rate determining step crystal growth, conventional Johnson-Mehl-Avrami-Kolmogorov model cannot be used this case. Moreover, it clearly sh...

We recently described the high-resolution X-ray structure of a helical bundle composed of eight copies of the â-peptide Zwit-1F (Figure 1A,B).1 Like many proteins in nature, the Zwit-1F octamer contains parallel and antiparallel helices, extensive inter-helical electrostatic interactions, and a solvent-excluded hydrophobic core. Here we explore the stability of the Zwit-1F octamer in solution u...