Study of rheological behavior of calcium carbonate-filled polypropylene in dynamic extrusion process

2014 ◽  
Vol 36 (4) ◽  
pp. 630-634 ◽  
Author(s):  
Quan Wang ◽  
Bin Liu ◽  
Chaohua Huang ◽  
Xiao Sun
Keyword(s):  
Calcium Carbonate ◽  
Rheological Behavior ◽  
Extrusion Process ◽  
Dynamic Extrusion

Study of Rheological Behavior of Calcium Carbonate Filled Polypropylene in Dynamic Extrusion

2014 ◽  
Vol 1053 ◽  
pp. 231-234 ◽  
Author(s):  
Quan Wang ◽  
Xiao Sun ◽  
Zheng Huan Wu
Keyword(s):  
Calcium Carbonate ◽  
Vibration Frequency ◽  
Rheological Behavior ◽  
Apparent Viscosity ◽  
Polymer Melt ◽  
Measuring Apparatus ◽  
Melt Rheology ◽  
Sinusoidal Vibration ◽  
Dynamic Extrusion ◽  
Vibration Parameters

A novel rheological measuring apparatus was designed, which introduced an additional sinusoidal vibration in parallel on the extruding direction of polymer melt in this paper. Melt rheology of polypropylene filled CaCO3 particles in various amounts of filler (i.e. with 3 and 20 wt%) during capillary melt-extrusion were investigated respectively. The effects of vibration parameters on rheological behaviors were studied. Compared with the steady extrusion, the apparent viscosity of filled system decreased remarkably with the increase of vibration frequency and amplitude. The apparent viscosity reached to the minimum value as vibration frequency was about 8 Hz. When the filled percentage of CaCO3 was low, the response of apparent viscosity will be more distinct with the increasing vibration parameters.

Better Process Description for the Extrusion of Silica and Carbon Black Compounds

2001 ◽  
Vol 74 (5) ◽  
pp. 899-914
Author(s):  
A. Limper ◽  
D. Schramm
Keyword(s):  
Carbon Black ◽  
Rheological Behavior ◽  
Extrusion Process ◽  
Rheological Characterization ◽  
Systematic Analysis ◽  
New Approach ◽  
Rubber Compounds ◽  
Plastics Processing ◽  
Multi Component System

Abstract In comparison to plastics processing, rubber processors handle a much more complex material. Due to active fillers used in rubber compounds, such as carbon black and silica, in some cases extraordinary filler/filler interactions occur. In general the multi-component system leads to a very complex rheological behavior. If silica compounds e.g. are processed the chemical modification of the filler surface (by organosilanes) has to be taken into account. By this the rheological behavior of the material changes dramatically. All these circumstances make rubber processing to a very complex theme. This paper presents results which are obtained within an European research project. The work is focussing on a better process description of the extrusion process of rubber compounds. It handles both applications of the extrusion process, i. e. for technical rubber goods or for making tire parts like the extrusion of tread stripes. Hence in this paper a new approach for modeling the flow in the extruder screw will be presented. Using this as a simulation tool a systematic analysis of the extrusion process is possible in reasonable time. Another field of interest in this context is the rheological characterization of rubber compounds with a so called „Extrusion-Rheometer“. The advantages of this device will be shown for the investigation of processability and gathering representative rheological data for recalculations of screw and die flow in the extrusion process.

Research of Viscosity of Calcium Carbonate Filled Polypropylene in Dynamic Extrusion

2014 ◽  
Vol 7 (1) ◽  
pp. 60-63
Author(s):  
Quan Wang ◽  
Tao Wang ◽  
Xiao Sun ◽  
Chaohua Huang ◽  
Yan Yan ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
Dynamic Extrusion
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