Improving Surface Functionality, Hydrophilicity, and Interfacial Adhesion Properties of High-Density Polyethylene with Activated Peroxides

Silica containing immobilized nanosilver (Ag-SiO2) or nanocopper (Cu-SiO2) was used as a filler for high-density polyethylene (HDPE). The HDPE/Ag-SiO2and HDPE/Cu-SiO2composites were prepared by melt blending and injection molding. The microstructure of the composites was examined using transmission electron microscopy (TEM). The crystallization behavior and thermal properties were studied using differential scanning calorimetry (DSC) and thermogravimetry (TGA). The mechanical properties were characterized by tensile, flexural, and impact tests as well as dynamic mechanical thermal analysis (DMTA). The ability of silica to give antimicrobial activity to HDPE was also investigated and discussed. The TEM images indicate that Ag-SiO2show lower degree of agglomeration than Cu-SiO2nanoparticles. The crystallization temperature increased, whereas crystallinity decreased in the composites. The thermal stability of the composites was significantly better compared to HDPE. Improved stiffness indicating very good interfacial adhesion was observed. Excellent activity against different kinds of bacteria was found.

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Comparative study of flexural and physical properties of graphite-filled immiscible polypropylene/epoxy and high-density polyethylene/epoxy blends

Polymers and Polymer Composites ◽

10.1177/09673911211047027 ◽

2021 ◽

pp. 096739112110470

Author(s):

Oluwaseun Ayotunde Alo ◽

Iyiola Olatunji Otunniyi

Keyword(s):

Water Absorption ◽

High Density Polyethylene ◽

Interfacial Adhesion ◽

Flexural Modulus ◽

High Density ◽

Flexural Properties ◽

Melt Mixing ◽

Synthetic Graphite ◽

Epoxy Blends ◽

Scanning Electron

Polypropylene/epoxy/synthetic graphite (PP/EP/SG) and high-density polyethylene (HDPE/EP/SG) composites were prepared by melt mixing followed by compression molding. The immiscibility of the polyolefins with epoxy was confirmed by thermogravimetric analysis. Scanning electron microscopy (SEM) studies showed that HDPE/EP blend exhibits inferior interfacial adhesion between the component polymers compared to PP/EP blend. Also, the effect of SG content on flexural properties, density, moldability, water absorption, and porosity of the PP/EP/SG and HDPE/EP/SG composites was investigated. For both PP/EP/SG and HDPE/EP/SG composites, flexural modulus, density, and porosity increased with increase in SG content. For PP/EP/SG composites, the water absorption decreased from 0.154% at 30 wt% SG to 0.072% at 70 wt% SG. Further increase in SG content to 80 wt% caused an increase in water absorption. On the other hand, water absorption for HDPE/EP/SG increased with SG content all through. At the same filler loadings, PP/EP/SG composites showed lower density and porosity and performed better in terms of flexural modulus and water absorption compared to HDPE/EP/SG composites.

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Structure and adhesion properties of acrylic acid grafted high-density polyethylene powders synthesized by a novel photografting method

Journal of Applied Polymer Science ◽

10.1002/app.28305 ◽

2008 ◽

Vol 109 (4) ◽

pp. 2316-2320 ◽

Cited By ~ 8

Author(s):

Zheng Cao ◽

Jingxin Lei ◽

Wenbing Zhang

Keyword(s):

Acrylic Acid ◽

High Density Polyethylene ◽

High Density ◽

Adhesion Properties

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The Effect of Caprolactam on Tensile Properties and Morphology of Recycled High Density Polyethylene/Ethylene Vinyl Acetate (RHDPE/EVA) Blends

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1133.211 ◽

2016 ◽

Vol 1133 ◽

pp. 211-215 ◽

Cited By ~ 1

Author(s):

A.R.H. Fatimah ◽

A.G. Supri ◽

Z. Firuz

Keyword(s):

Tensile Strength ◽

Tensile Properties ◽

Vinyl Acetate ◽

High Density Polyethylene ◽

Interfacial Adhesion ◽

Ethylene Vinyl Acetate ◽

High Density ◽

Rotor Speed ◽

Sem Micrograph ◽

Internal Mixer

This paper describes tensile properties, and morphology analysis of different composition of RHDPE and EVA blends were studied. The main goals are to describe the effect of Caprolactam as compatibilizer used to improve the compatibility between RHDPE and EVA. The RHDPE/EVA blends were prepared at 160°C and the rotor speed of 50rpm in an internal mixer. The tensile strength for RHDPE/EVA blends increased, while adding Caprolactam by 6phr in the blend formulation significantly improved the tensile properties. The SEM micrograph show a better interfacial adhesion between RHDPE and EVA phases for RHDEP/EVA/Caprolactam blends than RHDPE/EVA blends.

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Effect of fiber modified by alkali/polyvinyl alcohol coating treatment on properties of sisal fiber plastic composites

Journal of Reinforced Plastics and Composites ◽

10.1177/0731684420934866 ◽

2020 ◽

Vol 39 (23-24) ◽

pp. 880-889

Author(s):

Can Hu ◽

Yueyun Zhou ◽

Ting Zhang ◽

Taijun Jiang ◽

Guangsheng Zeng

Keyword(s):

Mechanical Properties ◽

Polyvinyl Alcohol ◽

Water Absorption ◽

High Density Polyethylene ◽

Interfacial Adhesion ◽

Natural Fibers ◽

High Density ◽

Sisal Fiber ◽

Reinforced Composites ◽

Plastic Composites

Demand for natural fibers reinforced composites is growing as an alternative to synthetic fiber reinforced plastic composites. However, poor compatibility between natural fiber and matrix has limited its development. Therefore, it is necessary to improve their interfacial adhesion to improve the comprehensive properties of composites. In this work, sisal fibers were subjected to an alkali/polyvinyl alcohol coating treatment by an ultrasonic impregnation method, and the sisal/high-density polyethylene composite was prepared by a twin-screw extruder. The Fourier transform infrared spectroscopy was used to characterize the modification effect of sisal fiber. The surface morphology of sisal fiber and the interfacial morphology of sisal/high-density polyethylene composites were observed. The mechanical properties and water absorption of sisal/ high-density polyethylene composites were also studied. The results show that alkali/polyvinyl alcohol coating compound treatment can effectively improve the interfacial adhesion between sisal fiber and high-density polyethylene, improve the mechanical properties of composite, and reduce water absorption. Alkali/polyvinyl alcohol coating compound treatment is a very environment-friendly, cost-effective fiber modification method when compared with traditional modification methods. It is helpful for the development and application of natural fibers reinforced composites.

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Effect of Benzyl Urea on Properties of Recycled High Density Polyethylene/Ethylene Vinyl Acetate/Egg Shell Powder Composites

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.695.40 ◽

2014 ◽

Vol 695 ◽

pp. 40-43

Author(s):

R.N. Farahana ◽

A.G. Supri ◽

Pei Leng Teh

Keyword(s):

Vinyl Acetate ◽

High Density Polyethylene ◽

Interfacial Adhesion ◽

Water Resistance ◽

Ethylene Vinyl Acetate ◽

High Density ◽

Absorption Properties ◽

Powder Composites ◽

Egg Shell ◽

Shell Powder

This paper presents the study on the effects of benzyl urea (BU) on the mechanical, morphological, and water absorption properties of recycled high density polyethylene/ ethylene vinyl acetate/ eggshell (rHDPE/EVA/ESP) composites. The results indicated significant improvement in the tensile strength and modulus of elasticity of the compatibilized composites due to better interfacial adhesion between the rHDPE and EVA. The water resistance properties were increased by the addition of the BU to the rHDPE/EVA/ESP composites. This study may suggest that BU can act as compatibilizer to enhance the interfacial interaction between the rHDPE and EVA matrix in the rHDPE/EVA/ESP composites.

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