Substrate removal kinetics in high-rate upflow anaerobic filters packed with low-density polyethylene media treating high-strength agro-food wastewaters

2013 ◽  
Vol 116 ◽  
pp. 101-106 ◽  
Author(s):  
Rajinikanth Rajagopal ◽  
Michel Torrijos ◽  
Pradeep Kumar ◽  
Indu Mehrotra
Keyword(s):  
High Strength ◽  
High Rate ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Substrate Removal

On the Use of a Kolsky Torsion Bar to Study the Transient Large-Strain Response of Polymer Melts at High Shear Rates

2004 ◽  
Vol 71 (4) ◽  
pp. 441-449 ◽  
Author(s):  
Y. Hu ◽  
R. Feng
Keyword(s):  
Polymer Melts ◽  
Large Strain ◽  
High Rate ◽  
Low Density Polyethylene ◽  
Large Strains ◽  
Low Density ◽  
Strain Response ◽  
High Shear ◽  
Instantaneous Rate ◽  
Torsion Bar

A Kolsky torsion bar is utilized successfully in a novel rheometric experiment for measuring the transient large-strain response of polymer melts under high shear-rate loading. A molten low-density polyethylene is studied with the new technique. The results show that the high-rate shear response of the material has an instantaneous rate dependence that may not be discernible at low rates and a strain-dependent hardening that saturates at large strains instead of fading. The usefulness of the technique and the significance of the findings are discussed in comparison with a modified rubberlike liquid theory and high-rate capillary measurements for low-density polyethylene melts.

High Strength - Low Hardness Thermoplastic Elastomers from Ethylene-Butene Copolymers and Low Density Polyethylene

2008 ◽  
Vol 81 (1) ◽  
pp. 60-76 ◽  
Author(s):  
Sandeep Tembhekar ◽  
Madhuchhanda Maiti ◽  
Jinu Jacob George ◽  
Anjan Biswas ◽  
Anil K. Bhowmick ◽  
...  
Keyword(s):  
Elevated Temperature ◽  
Functional Performance ◽  
High Strength ◽  
Thermoplastic Elastomer ◽  
Ethylene Vinyl Acetate ◽  
Thermoplastic Elastomers ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Vulcanized Rubber ◽  
Rubbery Material

Abstract A thermoplastic elastomer (TPE) is a rubbery material with final properties and functional performance similar to those of a conventional vulcanized rubber at ambient temperature, yet it can be processed as a thermoplastic at elevated temperature. The main objective of the present investigation was to prepare novel olefinic thermoplastic elastomers based on blends of a thermoplastic i.e. low density polyethylene (PE) and new ethylene-butene copolymers (PEB), which would have higher strength and lower hardness compared to the existing TPEs. The 70:30 PEB: PE blend exhibited the best properties. Ethylene vinyl acetate was found to work as compatibilizer at lower loadings in these blends. The resultant blends were of low hardness (60–80 Shore A) and high strength (26–33 MPa). The interaction parameter and the morphology of the blends were the key parameters, which governed the final properties of blends.

Biodegradation of low density polyethylene/starch films exposed to soil burial

2009 ◽  
Vol 34 (1) ◽  
pp. 41-48 ◽  
Author(s):  
Souad Djellalia ◽  
Nassima Benmahmoud ◽  
Tahar Sadoun
Keyword(s):  
Low Density Polyethylene ◽  
Low Density ◽  
Soil Burial ◽  
Starch Films
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