Investigation of Initial Bubbles of CO2 Injected into Polymer Melt

Hao Hua Zeng; Xiao Dan Wu

doi:10.4028/www.scientific.net/AMR.311-313.2127

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Synthesis and Electrical Properties of Mo-ZrO₂ Cermet
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Investigation of Initial Bubbles of CO₂ Injected into Polymer Melt
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Investigation of Initial Bubbles of CO₂ Injected into Polymer Melt

Abstract:

Continuous extrusion foaming of CO₂ gas is an efficient method to produce microcellular. The CO₂ concentration in polymer melt is related to initial bubble morphology. Using video recording in this paper bubble interfacial morphology was studied when the gas was injected into polymer melt . The process of single bubble formation in the static and dynamic polymer melt includes three stages. Screw was more effective for gas breaking up and separating. When mixed in screw channel, and blent in the mixing segment, the dispersion, and diffusion rate of gas into polymer melt were increased largely.