Blowing Agents and Foaming Processes 2010 Conference by Technology Smithersrapra Technology, Smithersrapra

By Technology Smithersrapra Technology, Smithersrapra Technology

Apart from the industries with a protracted demonstrated connection to polymeric foams, a becoming marketplace is being pushed by way of the present economy. finish clients are actually sourcing leading edge how one can preserve expenses down, determining new fabrics, resources and fabric choices. Foamed substrates usually symbolize inexpensive choices with the twin merits of saving fabric and removing extra weight - the latter minimising transport and different similar bills. therefore new purposes were made commercially manageable by means of the continued advancements within the mechanical functionality of foamed fabrics.

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B. Fig. 4. Microscopic images of cell structure of products blown with Expandex 5PT: a. TPU (heating by MW), b. PVC (heating by two techniques IR/MW) The microscopic images show miscellaneous structures of cellular TPU and PVCs. In the case of TPU the cells are fine and similar size. Value of anisotropy index close to unity confirms the equal expansion of cells in all directions. The characteristic of the cell structure of porous PVCs is different when compared to TPU material. Cells are non-uniformly spaced in polymer matrix and their sizes are considerably higher than in the case of compared TPU.

He also works on the application of microwave irradiation in polymer technology. Tomasz Sterzynski has got over 30 years experiences in polymer physics and polymer processing. His main research topics are polymer rheology by means of LDV molten flow determination, polymer extrusion and in line rheological investigation, determination of processing induced polymer structure by WAXS and synchrotron radiation and of physical properties, specific nucleation of polypropylene and its copolymers, as well as processing of modified polymers.

It has been estimated that the TRT is predominantly controlled by dielectric loss of the irradiated material and by microwave power [2]. Fig. 1. Temperature of PVCs granulated samples with ADC and profile vs. time as the effect of microwave irradiation with 500 W power. The TRT value is the effect of thermal balance of absorbing microwave power and heat removal of the material through the reactor. The TRT is affected not only by the dependency “dielectric loss versus temperature rise” but also by other irradiation conditions such preheating temperature and microwave power.

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