Rheological Study of Some Melts of High‐Density Polyethylene Intensively Charged with Surface Treated CaCO3. III. Study of the “Melt Fracture”

2003 ◽  
Vol 42 (4) ◽  
pp. 555-568 ◽  
Author(s):  
Filip Petraru ◽  
Marcel Popa ◽  
Radu Tudose
Keyword(s):  
High Density Polyethylene ◽  
High Density ◽  
Melt Fracture ◽  
Rheological Study

Rheological study on high-density polyethylene/organoclay composites

2010 ◽  
Vol 51 (1) ◽  
pp. 133-142 ◽  
Author(s):  
Youhong Tang ◽  
Cheng Yang ◽  
Ping Gao ◽  
Lin Ye ◽  
Chengbi Zhao ◽  
...  
Keyword(s):  
High Density Polyethylene ◽  
High Density ◽  
Rheological Study

scholarly journals Comparative Analysis of the Effect of Organoclay, Boron Nitride, and Fluoropolymer on the Rheology and Instabilities in the Extrusion of High Density Polyethylene

2015 ◽  
Vol 2015 ◽  
pp. 1-11 ◽  
Author(s):  
A. A. Adesina ◽  
M. S. Nasser ◽  
I. A. Hussein
Keyword(s):  
Comparative Analysis ◽  
Boron Nitride ◽  
High Density Polyethylene ◽  
Pressure Fluctuations ◽  
High Density ◽  
Melt Fracture ◽  
Distortion Factor ◽  
Stick Slip ◽  
Apparent Shear Rate ◽  
The Individual

The effect of different processing additives on the extrusion instabilities of high density polyethylene (HDPE) was investigated. The concentration of each processing additive was fixed at 0.05 wt%. Organoclay, boron nitride, and fluoropolymer reduced transient shear and extensional viscosities of HDPE melt. Drop in extrusion pressure occurred during the extrusion experiment. The initial loss of glossiness in HDPE was restored with the addition of these additives. However, the fluoropolymer did not succeed in eliminating the stick-slip fracture. Despite the inclusion of the processing additives, gross-melt fracture in HDPE reappeared at apparent shear rate of 141 s−1. Both moment and distortion factor methods of analyses were employed and their findings support the observed visual trends of the extrudate surface. The quantifying tools indicated that combined organoclay and fluoropolymer reduced the pressure fluctuations and its performance surpassed that of the individual additives.

Experimental study of the melt fracture behavior of filled high-density polyethylene melts

2013 ◽  
Vol 54 (2) ◽  
pp. 364-377 ◽  
Author(s):  
Francesco Baldi ◽  
Francesco Briatico-Vangosa ◽  
Anika Franceschini
Keyword(s):  
Experimental Study ◽  
High Density Polyethylene ◽  
Fracture Behavior ◽  
High Density ◽  
Melt Fracture ◽  
Polyethylene Melts
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