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.

Controlling thermal conductivity of high density polyethylene filled with modified hexagonal boron nitride (hBN)

2018 ◽  
Vol 735 ◽  
pp. 1200-1205 ◽  
Author(s):  
Dmitry S. Muratov ◽  
Andrey A. Stepashkin ◽  
Sergey M. Anshin ◽  
Denis V. Kuznetsov
Keyword(s):  
Thermal Conductivity ◽  
Boron Nitride ◽  
High Density Polyethylene ◽  
Hexagonal Boron Nitride ◽  
High Density

Thermal Conductivity of Nanocomposites Based in High Density Polyethylene and Surface Modified Hexagonal Boron Nitride via Cold Ethylene Plasma

2017 ◽  
Vol 38 (2) ◽  
pp. 429-441 ◽  
Author(s):  
José J. Borjas-Ramos ◽  
Luis F. Ramos-de-Valle ◽  
María G. Neira-Velázquez ◽  
Ernesto Hernández-Hernández ◽  
Esmeralda M. Saucedo-Salazar ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Boron Nitride ◽  
High Density Polyethylene ◽  
Hexagonal Boron Nitride ◽  
High Density ◽  
Surface Modified

Functionalization of boron nitride nanosheets by diazonium salt for preparation of nanocomposites with high‐density polyethylene

2018 ◽  
Vol 40 (6) ◽  
pp. 2346-2356 ◽  
Author(s):  
Zhujun Wang ◽  
Qian Li ◽  
Zheming Chen ◽  
Huayi Li ◽  
Shuirong Zheng ◽  
...  
Keyword(s):  
Boron Nitride ◽  
High Density Polyethylene ◽  
Diazonium Salt ◽  
High Density ◽  
Boron Nitride Nanosheets

scholarly journals Interfacial stick-slip transition in hydroxyapatite filled high density polyethylene composite

2006 ◽  
Vol 29 (1) ◽  
pp. 85-89 ◽  
Author(s):  
Joseph Roy ◽  
M. T. Martyn ◽  
K. E. Tanner ◽  
P. D. Coates
Keyword(s):  
High Density Polyethylene ◽  
High Density ◽  
Stick Slip ◽  
Polyethylene Composite ◽  
Slip Transition

On numerical Simulations of Polymer Extrusion Instabilities

2002 ◽  
Vol 12 (2) ◽  
pp. 88-104 ◽  
Author(s):  
Evdokia Achilleos ◽  
Georgios C. Georgiou ◽  
Savvas G. Hatzikiriakos
Keyword(s):  
Experimental Data ◽  
Numerical Modeling ◽  
Numerical Simulations ◽  
High Density Polyethylene ◽  
Time Dependent ◽  
Melt Fracture ◽  
Carreau Fluid ◽  
Polymer Extrusion ◽  
Extrudate Swell ◽  
Stick Slip

Abstract The objective of this study is mainly to review recent work concerning the numerical modeling of the stick-slip and gross melt fracture polymer extrusion instabilities. Three different mechanisms of instability are discussed: (a) combination of nonlinear slip with compressibility; (b) combination of nonlinear slip with elasticity; and (c) constitutive instabilities. Furthermore, preliminary numerical simulations of the time-dependent, compressible extrudate-swell flow of a Carreau fluid with slip at the wall, using a realistic macroscopic slip equation that is based on experimental data for a high-density polyethylene, are presented.

Sign in / Sign up

Export Citation Format

Share Document