Multi-scale reactive extrusion modelling approaches to design polymer synthesis, modification and mechanical recycling

Computer Aided Polymer Design Using Multi-scale Modelling

The ability to predict the key physical and chemical properties of polymeric materials from their repeat-unit structure and chain-length architecture prior to synthesis is of great value for the design of polymerbased chemical products, with new functionalities and improved performance. Computer aided molecular design (CAMD) methods can expedite the design process by establishing input-output r...

Chemical Modification of Polysaccharides Using Reactive Extrusion

Sodium carboxymethyl starch (CMS) was prepared using an extruder as a continuous solvent-less chemical reactor. The effects of NaOH, H2O, temperature, ethanol, sodium mono chloro acetate (SMCA), sodium tripolyphosphate (STPP), citric acid, epichlorohydrin and screw configuration on the degree of substitution (DS) and swelling properties of CMS were studied. Using these factors, CMS with the DS ...

Multi-scale Modelling and Mechanical Characterization of Porous Hierarchical Hydroxyapatite

Synthesis of Magnetic Graphene Oxide ‎Nanocomposite for Adsorption Removal of ‎Reactive Red 195: Modelling and ‎Optimizing via Central Composite Design

   In this work, magnetic graphene oxide (MGO) was prepared by in situ synthesis of magnetite nanoparticles in the presence of graphene oxide (GO). The prepared nanocomposite was characterized by applying scanning electron microscopy (SEM), X-ray diffraction (XRD, Fourier transform infrared spectroscopy (FTIR) and vibrating sample magnetometer (VSM). MGO was applied as an ...

Scale modification: alternative approaches and their consequences

Important marketing scales such as SERVQUAL are often adapted for use in a particular applied/theory-testing context and/or refined using some statistical method, assuming the resultant scale will have improved psychometric properties for a particular application. However, little attention has been paid to the consequences of how scale modifications are made, the criteria that are used to asses...