Abstract
The rheological properties of polystyrene (PS) melt were measured using a constant rate type of capillary rheometer over temperatures varied from 240 to 260°C and shear rates varied from 10 2 to 10 3 s −1. Dies with different entry angles were selected in order to identify the influence of the die angles on the pressure losses during extrusion of the melt. It was found that the end pressure losses increased non-linearly with increasing the piston speeds ( V), while the extrusion rate sensitivity of it was insignificant at higher temperature. The total pressure drop (Δ P) in the die extrusion of the melt also increased non-linearly with the increase of V, and decreased with a rise of temperature. In addition, Δ P decreased with increasing the die angle (2 α) and showed a minimum value when 2 α was about 75°.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
