کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
231905 1427463 2007 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of supercritical carbon dioxide on polystyrene extrusion
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Effect of supercritical carbon dioxide on polystyrene extrusion
چکیده انگلیسی

A study on the extrusion of polystyrene was carried out using supercritical carbon dioxide (scCO2) as foaming agent. scCO2 modifies the rheological properties of the material in the barrel of the extruder and acts as a blowing agent during the relaxation at the passage through the die. For experiments, a single-screw extruder was modified to be able to inject scCO2 within the extruded material. The effect of operating parameters on material porosity was studied. Samples were characterized by using water-pycnometry, mercury-porosimetry and scanning electron microscopy. Polystyrene with expansion rate about 15–25% was manufactured. A rapid cooling just downstream the die is important to solidify the structure. The die temperature allows the control of the porosity structure. CO2 concentration shows no significant influence.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: The Journal of Supercritical Fluids - Volume 43, Issue 2, December 2007, Pages 367–373
نویسندگان
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