Spherulites are radial distributions of acicular crystals, common in biogenic, geologic, and synthetic systems, yet exactly how spherulitic crystals nucleate grow is still poorly understood. To investigate these processes more detail, we chose scleractinian corals as a model system, because they well known to form their skeletons from aragonite (CaCO3) spherulites, comparative study crystal str...

A filament stretching extensional rheometer with a custom-built oven was used to investigate the effect of uniaxial flow on the crystallization of polypropylene. Prior to stretching, samples were heated to a temperature well above the melt temperature to erase their thermal and mechanical histories and the Janeschitz-Kriegl protocol was applied. The samples were stretched at extension rates in ...

The influence of aluminum, within the range of 0.08 - 6.16 wt.%, on the microstructure and hardness of as-cast ductile cast iron has been studied. A number of irons of different composition have been made by green sand casting and gravity die casting of appropriate design to provide the experimental materials. It has been found that Al addition and higher cooling rates in permanent mould castin...

The development of tough high-peformance composites often employs a variety of analytical methods that correlate morphological, yield and fracture characteristics to the corresponding properties of a composite. Most of these techniques can be severely limited due to the high concentration of fibres used in high performance composites (nominally 60 wt %). Several light microscopy techniques can ...

Open AccessCCS ChemistryRESEARCH ARTICLE14 Jul 2022In Situ Generation of N-Heteroaromatic Polymers: Metal-Free Multicomponent Polymerization for Photopatterning, Morphological Imaging, and Cr(VI) Sensing Yubing Hu, Neng Yan, Xiaolin Liu, Lingyu Pei, Canbin Ye, Wen-Xiong Wang, Jacky W. Y. Lam Ben Zhong Tang Hu Department Chemistry, The Hong Kong Branch Chinese National Engineering Research Cente...