چکیده مقاله
It is worthwhile to study the process ability of recyclable polypropylene for foaming applications Due to the outstanding functional characteristics and low material costs, polypropylene PP foams have been considered as a promising substitute for other thermoplastic foams in industrial applications This paper investigates the effect of blowing agent CO2 on expansion behaviours of non crosslinked high melt strength HMS polypropylene PP extruded foam The shape of the extruded polypropylene foam at the die exit carefully monitored using a charge coupling device CCD camera The expansion behaviour of HMS PP was observed and visualized by using varying amounts of supercritical carbon dioxide CO2 , varying amounts of talc and different die geometries Experimental results indicated that as the gas content increased, the maximum expansion ratio did not always increase Results also indicated that an optimum temperature exists for maximum expansion In other word the expansion ratios of PP foams blown with CO2 exhibited mountain shaped curves However, this typical mountain shaped expansion curves were not observed for some cases
کلیدواژهها
نویسندگان
T Azdast
Assistant Professor ۱Corresponding Author Address: Manufacturing Engineering Group, Mechanical Engineering Department, Faculty of Engineering, Urmia University, Urmia, Iran
C.B. Park
Full Professor of Department of Mechanical and Industrial Engineering, University of Toronto, Canada
A.H Behravesh
Associate Professor of Mechanical Engineering Department, Tarbiat Modares University, Tehran, Iran
E. K Lee
PhD Student of Department of Materials Science and Engineering, University of Toronto, Toronto, Canada
شیوه ارجاع
Azdast, T and Park, C.B. and Behravesh, A.H and Lee, E. K,1387,Visualization of CO2 Content Effect on Expansion Behaviour of HMS PP Extruded Foam,9th Iranian Conference on Manufacturing Engineering,Birjand
ارائهشده در
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