scholarly journals Rotomolding of Thermoplastic Elastomers Based on Low-Density Polyethylene and Recycled Natural Rubber

2019 ◽  
Vol 9 (24) ◽  
pp. 5430 ◽  
Author(s):  
Ramin Shaker ◽  
Denis Rodrigue
Keyword(s):  
Thermoplastic Elastomers ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Melt Blending ◽  
Material Degradation ◽  
Rubber Content ◽  
Ground Tire Rubber ◽  
The Road ◽  
Processing Cost ◽  
Physical Density

In this study, regenerated and nonregenerated off-the-road (OTR) ground tire rubber (GTR) was blended with low-density polyethylene (LDPE) to produce thermoplastic elastomers (TPE) by rotational molding. In particular, blending was performed by two different methods: melt blending (extrusion) and dry blending (high shear mixer). Then, different GTR concentrations (0, 20, 35, and 50 wt %) were used to determine the effect of rubber content on the processability and properties of the rotomolded compounds. From the samples produced, a complete morphological (optical and scanning electron microscopy), physical (density and hardness), and mechanical (tension, flexion, and impact) characterization was performed. The results showed that increasing the rubber content decreased the mechanical rigidity and strength but increased the elasticity and ductility. Finally, although melt blending led to slightly better properties than dry blending, the latter is more interesting to limit possible material degradation (mechanical, thermal, and oxidative), while reducing processing cost and time.

scholarly journals Effect of Ground Tire Rubber on Mechanical Properties of Low Density Polyethylene

2021 ◽  
Vol 8 (2) ◽  
pp. 85-92
Author(s):  
Mushtaq Asim ◽  
Khan Raza Muhammad ◽  
Ali Zaeem Uddin
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Thermoplastic Elastomer ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Rubber Content ◽  
Percentage Elongation ◽  
Tire Rubber ◽  
Ground Tire Rubber ◽  
Elastomer Blend

This research explores the effect of ground tire rubber (GTR) on the mechanical properties of LDPE. This thermoplastic-elastomer blend sets the composition of ground tire rubber and low-density polyethylene (LDPE/GTR). The blend was prepared in different proportions and was processed in a compression molding machine. The optimum operating conditions of the blend set to be 220℃ temperature and pressure varied from 150-200 bars. Different parts per hundred rubber (phr) samples were obtained under these conditions, including 1 phr, 2 phr, 3 phr, 4 phr, and 5 phr. After that, the mechanical properties of the blend were examined concerning various compositions. Different testing methods were used to determine the mechanical properties of the thermoplastic-elastomer blend, which include tensile strength, flexural strength, and Izod impact. The results obtained from these tests show that tensile strength and modulus decreases by increasing the rubber content. However, impact strength and percentage elongation increase by increasing the rubber content. This enhancement in impact and percentage elongation may be suitable for the applications in gymnasium mat and automobile industry.

scholarly journals Ground tire rubber filled low-density polyethylene: The effect of particle size

2021 ◽  
Author(s):  
Lóránt Kiss ◽  
Dániel Ábel Simon ◽  
Roland Petrény ◽  
Dávid Kocsis ◽  
Tamás Bárány ◽  
...  
Keyword(s):  
Particle Size ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Tire Rubber ◽  
Ground Tire Rubber ◽  
Effect Of Particle Size

The effect of polyester recycled tire fibers mixed with ground tire rubber on polyethylene composites. Part II

2018 ◽  
Vol 34 (3) ◽  
pp. 128-142 ◽  
Author(s):  
Siavosh Moghaddamzadeh ◽  
Denis Rodrigue
Keyword(s):  
Injection Molding ◽  
Low Density Polyethylene ◽  
Temperature Profiles ◽  
Linear Low Density Polyethylene ◽  
Mechanical Tension ◽  
Screw Speed ◽  
Tire Rubber ◽  
Ground Tire Rubber ◽  
Extruder Screw ◽  
Physical Density

This work reports on the mechanical (tension, flexion, and impact) and physical (density and hardness) properties of polyester recycled tire fibers (RTFs) mixed with ground tire rubber and linear low-density polyethylene with and without styrene–ethylene–butylene–styrene grafted maleic anhydride as a compatibilizer. In particular, the effect of RTF content (10, 25, and 50 wt%), extruder screw speed (110, 180, and 250 r/min), and temperature profiles (extrusion and injection molding) was studied. The results showed that the best properties were obtained at the highest RTF content (50%) and extruder screw speed (250 r/min) combined with the lowest temperature profile in both extrusion and injection molding when the compatibilizer was added.

Antimicrobial low-density polyethylene/low-density polyethylene-grafted acrylic acid biocomposites based on rice bran with tea tree oil for food packaging applications

2020 ◽  
pp. 089270572092514 ◽  
Author(s):  
Abd El-Aziz A El-Wakil ◽  
Hesham Moustafa ◽  
Ahmed M Youssef
Keyword(s):  
Acrylic Acid ◽  
Rice Bran ◽  
Food Packaging ◽  
Transmission Rate ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Melt Blending ◽  
Tea Tree Oil ◽  
Good Thermal Stability ◽  
Tea Tree

Natural volatile antibacterial and anti-mycotoxin tea tree oil (TTO) with rice bran (RB) were used as a solid carrier for achieving a sustained release profile with high antimicrobial efficiency in polyethylene films. Acrylic acid (AAc) monomer was grafted onto a low-density polyethylene (LDPE) through melt blending using a Brabender Plasti-Corder. The low-density polyethylene-grafted acrylic acid (LDPE- g-AAc) was thoroughly characterized by attenuated total reflectance–Fourier transform infrared spectroscopy. LDPE and LDPE- g-AAc (80/20) were mixed with different contents of untreated RB and treated TTO/RB using melt blending to obtain sustainable composites, namely LDPE/LDPE- g-AAc/RB and LDPE/LDPE- g-AAc/TTO-RB, respectively. The effect of the addition of untreated and treated RB on the properties of biocomposites was assessed by using mechanical, barrier, and thermal properties. A prominent decrease in water vapor transmission rate occurred when adding 30 wt% of TTO/RB to LDPE/LDPE- g-AAc blend compared to virgin polymer. This decrease was due to the barrier effect of lignocellulosic material, particularly at high bio-filler content. The prepared biocomposites revealed good thermal stability when compared to virgin LDPE. Moreover, the biodegradability and antimicrobial properties of LDPE/LDPE- g-AAc/TTO-RB biofilms were enhanced with increasing TTO/RB contents from 10 phr to 30 phr due to the combination between LDPE- g-AAc and TTO. The obtained data revealed excellent possibility for using biopolymer grafted with antimicrobial TTO by adding RB for food packaging and biomedical purposes.

Toughening of polylactide by melt blending with linear low-density polyethylene

2003 ◽  
Vol 89 (14) ◽  
pp. 3757-3768 ◽  
Author(s):  
Kelly S. Anderson ◽  
Shawn H. Lim ◽  
Marc A. Hillmyer
Keyword(s):  
Low Density Polyethylene ◽  
Low Density ◽  
Melt Blending ◽  
Linear Low Density Polyethylene

New Thermoplastic Elastomers from Poly(Ethylene-Octene) (Engage), Poly(Ethylene-Vinyl Acetate) and Low-Density Polyethylene by Electron Beam Technology: Structural Characterization and Mechanical Properties

2001 ◽  
Vol 74 (5) ◽  
pp. 815-833 ◽  
Author(s):  
S. Chattopadhyay ◽  
T. K. Chaki ◽  
Anil K. Bhowmick
Keyword(s):  
Mechanical Properties ◽  
Electron Beam ◽  
Vinyl Acetate ◽  
Structural Changes ◽  
Ethylene Vinyl Acetate ◽  
Thermoplastic Elastomers ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Dynamic Mechanical ◽  
Poly Ethylene

Abstract New thermoplastic elastomers have been prepared from the blends of metallocene-based polyolefins (Engage) with low-density polyethylene (LDPE), and ethylene-vinyl acetate copolymers (EVA) of different grades with LDPE by electron beam modification. Structural changes of these blends with or without sensitizer in presence of irradiation have been evaluated by X-ray diffraction (XRD) and differential scanning calorimetry (DSC). Scanning electron microscopy (SEM) in conjunction with atomic force microscopy (AFM) indicate the soft rubber domain in the continuous plastic matrix. Significant improvements of mechanical, dynamic mechanical and set properties have been obtained by electron beam modification, retaining its reprocessibility characteristics. Effects of ditrimethylol propane tetraacrylate (DTMPTA) as radiation sensitizer have also been evaluated from the mechanical, dynamic mechanical properties and reprocessibility.

Sign in / Sign up

Export Citation Format

Share Document