Thesis (M.Sc.) -- University of Toronto, 1999.
|Series||Canadian theses = -- Thèses canadiennes|
|The Physical Object|
|Pagination||2 microfiches : negative. --|
Jaap van Spronsen, Jeroen P.H. van Luijtelaer, Albert Stoop, J. Christian Scheper, Tjerk J. de Vries and Maaike C. Kroon, Development of a multiple‐hole die for the production of single large blocks of low‐density polystyrene using carbon dioxide as a blowing agent, Polymer Engineering & Science, 51, 11, (), (). Li et al. () proposed an approach for the measurement of PVT properties of polymer melts saturated with high-pressure gas at elevated temperatures, which is based on the observation of the. 1 Polymer processing using supercritical fluids Strategic solvent replacement 8 Physical and chemical properties of supercritical fluids 8 Interactions of carbon dioxide with polymers and solutes 11 Solubility in carbon dioxide 12 Sorption and swelling of polymers 14Cited by: 6. PVT (Pressure-Volume-Temperature) properties of polymers are important for both engineering and polymer physics. Fig.1 shows the typical PVT diagrams of an amorphous (a) and semi-crystalline polymer (b). PVT diagram describes the specific volume as a function of pressure and temperature. Specific volume increases with the temperature increasing.
Study of the Rheological Properties of Polymer/Gas Solutions Based on a Foam Extrusion System, Simon S. Park (NSERC PGS-A Scholarship holder) On-Line Measurement of the PVT Properties of Polymer/CO2 Solutions Using a Foam Extrusion System and a Gear Pump. Focus on: Carbon Dioxide and Polymers. 02 Mar By Fiona Hatton. Carbon dioxide constitutes a small amount of our atmosphere (currently around %) however it is vital for the survival of life on our planet. CO 2 has been found to be a useful trigger for stimuli-responsive materials as it is benign, abundant, “green” and inexpensive. We examined the PVT behaviors of polypropylene (PP) and PP/organoclay polymer nanocomposite (PP-PNC) by monitoring the swelling changes of the polymer melt in supercritical carbon dioxide (scCO(2)). G reen plants accomplish the task of generating monomers and then polymers from CO2 daily on a global scale [[HN1]]. But what seems easy for plants remains a difficult problem for polymer scientists. To be fair, the situation in nature is quite different from that in a chemical factory. An industrial plant has a fixed capacity reflecting market need, and ideally all resources are used for.
Chemical fixation of CO 2 is highly attractive from viewpoint of carbon resource utilization. A promising area of CO 2 utilization is the copolymerization of CO 2 and epoxide to afford polycarbonates pioneered by Inoue in Depending on the type of catalyst, the reaction can be steered to produce alternating polycarbonate (Scheme 1A) or polyethercarbonate (Scheme 1B). Using carbon dioxide as a feedstock instead of conventional petroleum-derived raw materials is an attractive scenario to produce polymers. Developing processes and products that are "sustainable" and have reduced "carbon footprint" have been important goals. CO . Novomer is a small start-up chemistry company developing novel methods for converting waste carbon dioxide, CO2, into useful plastics, polymers and chemical intermediates. Novomer has developed proprietary catalysts that react with CO2 and allow it to bond with other molecules. CO2 is a difficult molecule to work with for the same reasons that it accumulates in the atmosphere, because it . Titanium dioxide (TiO2) nanoparticles have recently appeared in PET waste because of the introduction of opaque PET bottles. We prepare polymer blend nanocomposites (PBNANOs) by adding hydrophilic (hphi), hydrophobic (hpho), and hydrophobically modified (hphoM) titanium dioxide (TiO2) nanoparticles to 80rPP/20rPET recycled blends. Contact angle measurements show that the degree of.