Flow-induced structure formation is investigated with in situ wide-angle X-ray diffraction with high acquisition rate (30 Hz) using isotactic polypropylene in a piston-driven slit flow with high wall shear rates (up to ≈900 s(-1) ). We focus on crystallization within the shear layers that form in the high shear rate regions near the walls. Remarkably, the kinetics of the crystallization process...

We derive a kinetic Monte Carlo algorithm to simulate flow-induced nucleation in polymer melts. The crystallisation kinetics are modified by both stretching and orientation of the amorphous chains under flow, which is modelled by a recent non-linear tube theory. Rotation of the crystallites under flow is modelled by a simultaneous Brownian dynamics simulation. Our kinetic Monte Carlo approach i...

Abstract On the >1 µm scale morphology of semicrystalline plastics like polyethylene or Nylon features spherulites, “shish-kebabs”, cylinddrites and other crystalline aggregates which strongly affect mechanical material properties. Current imaging techniques give only a 2D picture these objects. Here we show how they can be visualized in 3D using fluorescent labels confocal microscopy. As re...

Meat species specification is an area which needs specialized attention in food forensics. It is a vital field to ensure the food safety to the consumers and conserves the laws related to meat and meat products. The adulteration of inferior quality meat into superior quality meat is a common practice all over the world. DNA-Based techniques can easily solve the problems of vetro-legal or forens...

ethylene polymerization was carried out using phillips chromium catalyst based on silica supports such as silicaaerogel, sio2 (grace 643), and titanium modified sio2 (g 643), and the results were compared with othercatalysts based on sio2 (aldrich), sba-15(hex), sba-15(sp) and mcm-41. a combination of tga, dsc, xrd,nitrogen adsorption, sem, icp, ftir and other analyses were used to characterize...

Lamellar Frameworks In article number 2107941, Runlai Li, Qiang Fu, and co-workers propose a method to thin down commodity polymers into lamellar frameworks (LTF) with square-meter large area. Interactions between molecules are regulated by multistep processing for ordered molecular alignment. The prepared new structures (LTF shish-network), properties (ultrahigh transparency specific stiffness...