Effect of EVA and DCP addition on injection moldability and tensile properties of recycled PE from disposable drip tapes

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Shoujun Wu ◽  
Jinlian Liang ◽  
Yingjun Feng ◽  
Delan Zhu ◽  
Bin Guo
Keyword(s):  
Tensile Strength ◽  
Tensile Properties ◽  
Ethylene Vinyl Acetate ◽  
Adverse Impact ◽  
Dicumyl Peroxide ◽  
Positive Effects ◽  
Recycled Polyethylene ◽  
Co Addition ◽  
Acetate Copolymer ◽  
Ethylene Vinyl Acetate Copolymer

Abstract The effects of ethylene-vinyl acetate copolymer (EVA) and dicumyl peroxide (DCP) addition on injection moldability and tensile properties of recycled polyethylene (PE) from disposable drip tapes were studied. DCP showed an adverse impact on the injection moldability of recycled PE materials, while EVA had positive effects on it. Tensile properties of the reproduced PE increased with the increasing amount of EVA up to 10 wt.% and decreased beyond it. The DCP addition reduced the elastic properties of the reproduced PE, while it enhanced the tensile strength. Overall, the co-addition of 6 wt.% EVA + 0.4 wt.% DCP could improve the tensile strength of the reproduced PE materials.

scholarly journals STUDY ON SOME PROPERTIES AND MORPHOLOGY OF COMPOSITES BASED ON POLYETHYLENE GRAFTED ACRYLIC ACID/ETHYLENE-VINYL ACETATE COPOLYMER/CALCIUM CARBONATE

2017 ◽  
Vol 25 (2) ◽  
pp. 355-361
Author(s):  
Thai Hoang ◽  
Do Van Cong
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Calcium Carbonate ◽  
Acrylic Acid ◽  
Ethylene Vinyl Acetate ◽  
Melt Mixing ◽  
Elongation At Break ◽  
Acetate Copolymer ◽  
Ethylene Vinyl Acetate Copolymer ◽  
Better Than

Composites based on polyethylene grafted acrylic acid (PE-g-AAc)/ethylene-co-vinylacetate copolymer (EVA)/calcium carbonate (CaCO3) were prepared by melt mixing. Relative melt viscosity, morphology, mechanical properties and thermostability of the composites were studied. The experimental results show that the presence of (CaCO3) activated by stearic acid (10-20 wt.%) changes lightly stable torque of polymer blend of PE-g-AAc/EVA. Use of modified PE improves compatibility of PE and EVA as well as makes the components disperse into each other better than in blends using unmodified PE. Tensile strength and elongation at break of both polymer blends decrease with presence of CaCO3. However, tensile strength of the composites of PE-g-AAc/EVA/CaCO3 is higher than that of composites of PE/EVA/CaCO3. Beside that, the composites of PE-g-AAc/EVA/CaCO3 have thermostability higher than the composites of PE/EVA/CaCO3.  

Recycled Polycarbonate Based Nanocomposites

2013 ◽  
Vol 559 ◽  
pp. 43-47 ◽  
Author(s):  
G. Japins ◽  
Janis Zicans ◽  
Remo Merijs Meri ◽  
T. Ivanova ◽  
R. Berzina ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Tensile Strength ◽  
Impact Strength ◽  
Yield Strength ◽  
Ethylene Vinyl Acetate ◽  
Weight Content ◽  
Thermal Stability Of ◽  
Acetate Copolymer ◽  
Montmorillonite Nanoclay ◽  
Ethylene Vinyl Acetate Copolymer

Post-consumer polycarbonate (RPC) blends with various amounts (5, 10, 30 wt. %) of ethylene vinyl acetate copolymer (EVAc) are investigated as potential nanocomposite matrices. At EVAc weight content of 10 wt.% maximum tensile strength σM and impact strength AI increase is observed in comparison to neat RPC. Addition of EVAc, however, reduces resistance to creep as well as decrease thermal stability of the investigated compositions. Addition of montmorillonite nanoclay (MMT), however, allows increase modulus of elasticity E and yield strength σY of the investigated RPC blend with 10 wt. % of EVAc. Besides it creep resistance and thermal resistance of the investigated system is increased to certain extent.

scholarly journals SYNTHESIS OF EVAgMA AND ITS EFFECTS ON TENSILE PROPERTIES AND MORPHOLOGY OF ETHYLENE VINYL ACETATE COPOLYMER/BAMBOO FLOUR AND POLYPROPYLENE/ BAMBOO FLOUR COMPOSITES

2018 ◽  
Vol 56 (3B) ◽  
pp. 199
Author(s):  
Mai Duc Huynh ◽  
Do Quang Tham ◽  
Do Van Cong ◽  
Tran Huu Trung ◽  
Nguyen Vu Giang
Keyword(s):  
Tensile Properties ◽  
Vinyl Acetate ◽  
Ethylene Vinyl Acetate ◽  
Thermoplastic Composites ◽  
The Poor ◽  
Bamboo Flour ◽  
Natural Additive ◽  
Poor Adhesion ◽  
Acetate Copolymer ◽  
Ethylene Vinyl Acetate Copolymer

Thermoplastic composites reinforced with natural fillers (WPCs) have being attracted many attentions in recent years. The biggest challenges for WPCs production have to face is the poor adhesion and interaction between the components in the composites. This study investigates the technique to overcome these challenges without the treatment and surface modification of natural additive fillers. The obtained experimental results showed that using maleic anhydride grafted ethylene vinyl acetate copolymer (EVAgMA) with 1.16 wt.% of MA could enhance the adhesion and interaction of bamboo flour (BF) with EVA and polypropylene (PP) matrices. These expressed through the improvement of tensile properties and mophological structure of EVA/BF composite and PP/BF composite with the presence of EVAgMA. Tensile strength of EVA/BF and PP/BF composites at the same 50 wt% of BF, increased 67 and 12%, respectively when EVAgMA was introduced.

scholarly journals Indicator Layers Based on Ethylene-Vinyl Acetate Copolymer (EVA) and Dicyanovinyl Azobenzene Dyes for Fast and Selective Evaluation of Vaporous Biogenic Amines

Sensors ◽  
2018 ◽  
Vol 18 (12) ◽  
pp. 4361
Author(s):  
Tinkara Mastnak ◽  
Aleksandra Lobnik ◽  
Gerhard Mohr ◽  
Matjaž Finšgar
Keyword(s):  
Biogenic Amines ◽  
Vinyl Acetate ◽  
Colour Change ◽  
Ethylene Vinyl Acetate ◽  
Yellow Orange ◽  
Colour Changes ◽  
Limit Sensitivity ◽  
Linear Concentration Range ◽  
Acetate Copolymer ◽  
Ethylene Vinyl Acetate Copolymer

The article presents naked-eye methods for fast, sensitive, and selective detection of isopentylamine and cadaverine vapours based on 4-N,N-dioctylamino-4′-dicyanovinylazobenzene (CR-528) and 4-N,N-dioctylamino-2′-nitro-4′-dicyanovinylazobenzene (CR-555) dyes immobilized in ethylene-vinyl acetate copolymer (EVA). The reaction of CR-528/EVA and CR-555/EVA indicator layers with isopentylamine vapours caused a vivid colour change from pink/purple to yellow/orange-yellow. Additionally, CR-555/EVA showed colour changes upon exposure to cadaverine. The colour changes were analysed by ultraviolet–visible (UV/VIS) molecular absorption spectroscopy for amine quantification, and the method was partially validated for the detection limit, sensitivity, and linear concentration range. The lowest detection limits were reached with CR-555/EVA indicator layers (0.41 ppm for isopentylamine and 1.80 ppm for cadaverine). The indicator layers based on EVA and dicyanovinyl azobenzene dyes complement the existing library of colorimetric probes for the detection of biogenic amines and show great potential for food quality control.

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