Rheology studies of foam flow during injection mold filling Journal Articles

abstract

• AbstractThis work studies the flow behavior of a developing two‐phase gas‐polymer suspension during injection into the instrumented mold cavity of an injection molding machine. In the experiments, blowing agent type and concentration were varied along with processing conditions, to generate controlled cell structures in two different polymers, low density polyethylene and thermoplastic polyolefin. Experimental results indicate that the rheological properties of two phase gas‐polymer suspensions were sensitive to shear rate, blowing agent concentration, melt temperature, and mold temperature. The viscosity of all gas‐polymer suspensions revealed a reduction compared with neat polymer melt in the presence of gas bubbles, because of the reduced volume fraction of polymer matrix. A two‐phase rheological model has been used for fitting with our experimental results for estimating the shear viscosity of two‐phase flow in the mold cavity of the injection molding machine. POLYM. ENG. SCI., 47:522–529, 2007. © 2007 Society of Plastics Engineers.

authors

• Qin, X
• Thompson, Michael
• Hrymak, Andrew

status

• published 

publication date

• April 2007

has subject area

• 0303 Macromolecular and Materials Chemistry (FoR)
• 0904 Chemical Engineering (FoR)
• 0912 Materials Engineering (FoR)
• Polymers (Science Metrix)

published in

• Polymer Engineering and Science  Journal

keywords

• BUBBLE-BEARING MAGMAS
• CO2
• DYNAMICS
• EMULSIONS
• EXTRUSION
• Engineering
• Engineering, Chemical
• GROWTH
• MOLECULAR DIMENSIONS
• NUCLEATION
• PREDICTION
• Physical Sciences
• Polymer Science
• Science & Technology
• Technology
• VISCOSITY

Digital Object Identifier (DOI)

• 10.1002/pen.20730

start page

• 522

end page

• 529

volume

• 47

issue

• 4