scholarly journals Investigation of structural and mechanical properties of BioCaCO3-LDPE composites

2019 ◽  
Vol 1 (2) ◽  
pp. 29-43 ◽  
Author(s):  
Serife Yalcın ◽  
Daniel Chateigner ◽  
Loïc Le Pluart ◽  
Stéphanie Gascoin ◽  
Sophie Eve
Keyword(s):  
Mechanical Properties ◽  
Quantitative Phase Analysis ◽  
X Ray Diffraction ◽  
Crepidula Fornicata ◽  
Dog Bone ◽  
The Matrix ◽  
Twin Screw ◽  
Injection Molded ◽  
Ldpe Composites ◽  
Acid Coating

The three different Mollusk shells, Pecten maximus, Crepidula fornicata and Crassostrea gigas, were studied and compared with synthetic and commercial powders. All samples were analysed by X-ray diffraction, Quantitative phase analysis, and quantitative line broadening (microstructure) analysis using the Combined Analysis method. LDPE-CaCO3 composites were prepared in a twin screw extruder in the composition range of 0–10.8 filler content. Ultimate Mechanical properties of dog-bone type injection molded tensile specimens (ISO-527-2-5A) were measured. Results are showing that the biogenic calcium carbonate is less efficient in improving polyethylene stiffness than the synthetic ones, independently of its crystalline form, to use stearic acid coating allows an improvement of the matrix stiffening. The yield strength is unchanged whatever the kind of filler used.

Study Intercalation and Mechanical Properties of Nanocomposites of HDPE/Organoclay

2012 ◽  
Vol 727-728 ◽  
pp. 1785-1788
Author(s):  
Milena Costa da Silva ◽  
Sara Verusca de Oliveira ◽  
Tomás Jefférson Alves de Mélo ◽  
Edcleide Maria Araújo
Keyword(s):  
Mechanical Properties ◽  
High Speed ◽  
Bentonite Clay ◽  
Synthesis Process ◽  
X Ray Diffraction ◽  
New Class ◽  
Different Types ◽  
The Matrix ◽  
Twin Screw ◽  
Xrd Patterns

Nanocomposites are hybrid materials that can be obtained with, three, two or bust one-dimensional in nanoscale found in particles dispersed in the matrix. By presenting a nanometric structure, this new class of materials may have only properties, different from traditional composites and their constituents, which may be established in the synthesis process. The aim of this work is prepare nanocomposites of HDPE/ bentonite clay by melt intercalation technique. Systems were evaluated for the presence of untreated clay and chemically treated (organoclay) with two different types of quaternary ammonium salts, Cetremide and Dodigen. In the preparation of nanocomposites were obtained concentrated using a high speed mixer and then the nominal percentage of clay was dispersed in a twin screw extruder corrotacional. The systems were characterized by X-ray diffraction and mechanical properties. The XRD patterns of nanocomposite of HDPE/organoclay suggest a not intercalated structure. The mechanical properties of nanocomposites presented reducing values in relation to pure polymer.

scholarly journals Reinforcing Linear Low-Density Polyethylene with Surfactant-Treated Microfibrillated Cellulose

Polymers ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 441 ◽  
Author(s):  
Guangzhao Wang ◽  
Xiaohui Yang ◽  
Weihong Wang
Keyword(s):  
Mechanical Properties ◽  
Composite Film ◽  
Mechanical Test ◽  
Intermolecular Hydrogen Bond ◽  
Microfibrillated Cellulose ◽  
Light Transmittance ◽  
Test Results ◽  
X Ray Diffraction ◽  
Twin Screw ◽  
Ldpe Composites

Due to its excellent mechanical properties and reinforcement abilities, cellulose has become a promising candidate for developing nanocomposites. However, cellulose agglomeration is an issue that must be solved. In this study, we treated microfibrillated cellulose (MFC) with a mixture of the non-ionic surfactants Span80 and Tween80 (ratio of 1:1) in order to prevent the intermolecular hydrogen bond aggregation of MFC during the process of MFC drying. We used a conical twin-screw extruder to melt compounds for the surfactant-treated MFC and powdered LLDPE. Furthermore, the extruded mixture was hot-pressed into a film, and we also tested the properties of the composite film. We can conclude that there was no agglomeration in the composite film according to microscopic observations and light transmittance test results. Furthermore, the dispersion of the surfactant-treated MFC (STMFC) was uniform until the STMFC filler increased to 10 wt%. The mechanical test results show that when the content of STMFC filler was 10 wt%, the mechanical properties of the composite were optimal. Compared to LLDPE, the STMFC/LLDPE composite film had an increase of 41.03% in tensile strength and an increase of 106.35% in Young’s modulus. Under this system, the DSC results show that the melting point of LLDPE increased from 125 to 131 °C. X-ray diffraction (XRD) results showed that the addition of STMFC did not change the crystallinity of the STMFC/LDPE composites, although the crystallite size increased.

Microstructure characterization and evaluation of mechanical properties of stir rheocast AA2024/TiB2 composite

2019 ◽  
Vol 54 (7) ◽  
pp. 981-997
Author(s):  
Semegn Cheneke ◽  
D Benny Karunakar
Keyword(s):  
Mechanical Properties ◽  
Dendritic Structure ◽  
Optical Microscope ◽  
X Ray Diffraction ◽  
Globular Structure ◽  
Cast Sample ◽  
X Ray ◽  
Weight Percentage ◽  
The Matrix ◽  
Fractured Surface

In this research, microstructure and mechanical properties of stir rheocast AA2024/TiB2 metal matrix composite have been investigated. The working temperature was 640℃, which was the selected semisolid temperature that corresponds to 40% of the solid fraction. Two weight percentage, 4 wt%, and 6 wt% of the TiB2 reinforcements were added to the matrix. The field emission scanning electron microscope micrographs of the developed composites showed a uniform distribution of the particles in the case of the 2 wt% and 4 wt% of the reinforcements. However, the particles agglomerated as the weight percentages of the reinforcement increases to 6%. The optical microscope of the liquid cast sample showed the dendritic structure, whereas the rheocast samples showed a globular structure. The X-ray diffraction analysis confirmed the distribution of the reinforcements in the matrix and the formation of some intermetallic compounds. Mechanical properties significantly improved by the addition of the reinforcements in the matrix. An increase in tensile strength of 13.3%, 40%, 28%, and 5% was achieved for the unreinforced rheocast sample, 2 wt%, 4 wt%, and 6 wt% reinforced rheocast samples respectively, compared to the liquid cast sample. An increase in 20% of hardness was attained for the composite with 2 wt% TiB2 compared to the liquid cast sample. According to the fractography analysis, small dimples were observed on the fractured surface of the unreinforced rheocast sample, whereas small and large voids were dominant on the fractured surface of the 2 wt% composite, which shows the ductile fracture mode.

INNOVATIVE MANUFACTURING OF CARBON NANOTUBE-LOADED FIBRILLAR POLYMER COMPOSITES

2010 ◽  
Vol 24 (15n16) ◽  
pp. 2459-2465 ◽  
Author(s):  
R. J. T. LIN ◽  
D. BHATTACHARYYA ◽  
S. FAKIROV
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Polymer Composites ◽  
Polyamide 66 ◽  
Screw Extruder ◽  
Enhancing Effect ◽  
The Matrix ◽  
Twin Screw ◽  
New Type ◽  
Scanning Electron

The concept of microfibrillar composite (MFC) has been used to create a new type of polymer composites, in which the reinforcing microfibrils are loaded with carbon nanotubes (CNT). Polyamide 66 (PA66) has been melt blended with polypropylene in a twin screw extruder with and without CNT, and thereafter cold drawn to create a fibrillar state as well as to align the CNT in the PA66 microfibrils. The drawn bristles were compression moulded at 180°C to prepare MFC plates. The scanning electron microscope (SEM) observations indicate near perfect distribution of CNT in the reinforcing PA66 microfibrils. Although the fibrillated PA66 is able to improve the tensile stiffness and strength as expected from the MFC structure, the incorporation of CNT does not exhibit any further enhancing effect. It rather adversely affects the mechanical properties due to poor interface adhesion between the matrix and the reinforcing microfibrils with the presence of CNT, as demonstrated by SEM. However, the resulting highly aligned CNT within the MFC are expected to affect the physical and functional properties of these composites.

scholarly journals Enhancement of Mechanical and Thermal Properties of Polylactic Acid/Polycaprolactone Blends by Hydrophilic Nanoclay

2013 ◽  
Vol 2013 ◽  
pp. 1-11 ◽  
Author(s):  
Chern Chiet Eng ◽  
Nor Azowa Ibrahim ◽  
Norhazlin Zainuddin ◽  
Hidayah Ariffin ◽  
Wan Md. Zin Wan Yunus ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Polylactic Acid ◽  
Mechanical Analysis ◽  
Basal Spacing ◽  
Mechanical And Thermal Properties ◽  
X Ray Diffraction ◽  
Transmission Electron ◽  
The Matrix ◽  
Thermal Stability Of

The effects of hydrophilic nanoclay, Nanomer PGV, on mechanical properties of Polylactic Acid (PLA)/Polycaprolactone (PCL) blends were investigated and compared with hydrophobic clay, Montmorillonite K10. The PLA/PCL/clay composites were prepared by melt intercalation technique and the composites were characterized by X-ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Thermogravimetric Analysis (TGA), Dynamic Mechanical Analysis (DMA), Scanning Electron Microscopy (SEM), and Transmission Electron Microscopy (TEM). FTIR spectra indicated that formation of hydrogen bond between hydrophilic clay with the matrix. XRD results show that shifting of basal spacing when clay incorporated into polymer matrix. TEM micrographs reveal the formation of agglomerate in the composites. Based on mechanical properties results, addition of clay Nanomer PGV significantly enhances the flexibility of PLA/PCL blends about 136.26%. TGA showed that the presence of clay improve thermal stability of blends. DMA show the addition of clay increase storage modulus and the presence of clay Nanomer PGV slightly shift two Tg of blends become closer suggest that the presence of clay slightly compatibilizer the PLA/PCL blends. SEM micrographs revealed that presence of Nanomer PGV in blends influence the miscibility of the blends. The PLA/PCL blends become more homogeneous and consist of single phase morphology.

scholarly journals Polymer Composites Used in Rapid Prototyping Technology

2020 ◽  
Vol 44 (1) ◽  
pp. 15-20
Author(s):  
Katarzyna Bulanda ◽  
Mariusz Oleksy ◽  
Rafał Oliwa ◽  
Grzegorz Budzik ◽  
Tadeusz Markowski
Keyword(s):  
Mechanical Properties ◽  
3D Printing ◽  
Fused Deposition Modeling ◽  
New Materials ◽  
Fused Deposition ◽  
The Matrix ◽  
Molded Parts ◽  
Deposition Modeling ◽  
Injection Molded ◽  
The Impact

AbstractNew materials and filaments dedicated to 3D printing were obtained using the fused deposition modeling method, and the properties of the produced materials were investigated. Polylactide was used as a polymer base for the assays because of the desired properties of the polymer, mainly biodegradability, and the matrix was refilled by the addition of metallic nanofillers, such as bronze, copper, brass, and steel. For the composites obtained, mechanical properties were investigated to determine the dependence of the obtained results on the content and type of filler used and on the method of fabrication of the fittings. It was found that the additives present in the polymer matrix increased the fluidity of the material. The best results were obtained for the compositions with bronze and steel in which the mass flow rate was 72.97 and 79.99 g/10 min, respectively. The filled material that had lower hardness was measured by Rockwell and the impact strength was measured by Charpy. In addition, it was found that injection-molded parts obtained much better mechanical properties than those obtained by 3D printing.

Characterization and determination of thermal and radioluminescence properties of low-density polyethylene (LDPE)-(nanozeolite + Y2O3) composite

2019 ◽  
Vol 28 (2) ◽  
pp. 112-118
Author(s):  
Murat Çanlı ◽  
İlker Çetin Keskin ◽  
Murat Türemiş ◽  
Kamil Sirin ◽  
Mehmet İsmail Katı
Keyword(s):  
Low Density Polyethylene ◽  
Low Density ◽  
X Ray Diffraction ◽  
Twin Screw ◽  
Nanocomposite Fibers ◽  
To Come ◽  
Ldpe Composites ◽  
Dispersing Medium ◽  
Extrusion Method

Nanotechnology has become one of the most popular areas of interdisciplinary research. In the vast majority of nanotechnology applications, polymer-based matrices were used as the dispersing medium of nanoparticles. The combination of polymer–zeolite nanocomposite has the potential to come out with the advantages of polymers and zeolites while coping with the deficiencies of both materials. In this study, the synthesis and properties of low-density polyethylene (LDPE) composites with nanozeolite + Y2O3 are investigated. Polyethylene nanocomposite fibers containing nanozeolite + Y2O3 at 5% by mass using a melt extrusion method were composed in a laboratory type twin screw extruder. The thermal properties of the composite fibers were determined by analysis of both thermal gravimetric and differential thermal spectra. Their structural properties were enlightened by scanning electron microscopy, Fourier transform infrared, and ultraviolet absorption. According to the results of X-ray diffraction tests, the samples contain crystals in semicrystalline and α form. The mechanical properties of LDPE matrices increased with the addition of nanoparticles. In addition, radioluminescence properties of the polymer were also improved after composing with nanozeolite and Y2O3.

Influence of Clay Incorporation on the Physical Properties of Polyethylene/Brazilian Clay Nanocomposites

2008 ◽  
Vol 8 (4) ◽  
pp. 1937-1941
Author(s):  
R. Barbosa ◽  
E. M. Araújo ◽  
T. J. A. Melo ◽  
E. N. Ito ◽  
E. Hage
Keyword(s):  
Mechanical Properties ◽  
Ammonium Salt ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salt ◽  
Dispersion Analysis ◽  
Clay Nanocomposites ◽  
X Ray Diffraction ◽  
Clay Particles ◽  
Transmission Electron ◽  
The Matrix

High density polyethylene/Brazilian clay nanocomposites were prepared by the melt intercalation technique. A montmorillonite sample from Boa Vista/PB, Northeast of Brazil, was organically modified with esthearildimethylammonium chloride (Praepagen WB) quaternary ammonium salt. The unmodified and modified clays with the quaternary ammonium salt were introduced in 1, 2, 3 and 5 wt% in a PE polymer matrix. The dispersion analysis and the interlayer distance of the clay particles were obtained by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The mechanical properties of tensile and the flammability of the nanocomposites were studied. In general, the mechanical properties of the systems presented superior values compared to the matrix. The systems showed a reduction on the burning rate, indicating that the flammability resistance of nanocomposites was improved.

Characteristics and Properties of Reinforced Oil Palm Frond Fibers (OPFF) in Polyvinyl Alcohol (PVA) Composite for Tubular-Shaped Trays

2015 ◽  
Vol 751 ◽  
pp. 3-8
Author(s):  
Nawapon Sukudom ◽  
Lerpong Jarupan
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Oil Palm ◽  
Morphological Properties ◽  
Degree Of Crystallinity ◽  
Poly Vinyl Alcohol ◽  
Oil Palm Frond ◽  
The Matrix ◽  
Twin Screw ◽  
Palm Frond

Effects on characteristics and mechanical properties of oil palm frond fiber (OPFF) as a reinforced element in poly vinyl alcohol (PVA) were investigated in this study. Series of different loading of OPFF were prepared by the following compositions: 5, 10, 15, 20 and 25 part per resin (phr). Glycerol at 35 phr was also compounded using twin-screw extruder to decrease degree of crystallinity and to reduce shear force of PVA to improve the processability. Injection molding was used to produce specimen for testing. The results indicated that the OPFF has an impact on mechanical properties of the composite material. Different scanning calorimeter (DSC) showed that the melting temperature (Tm) of OPFF reinforced PVA blended with glycerol was shifted to having decrease when compared to the pure PVA. Different loading contents of OPFF indicated that the compressive strength and morphological properties performed by a similar fashion. A highest compressive strength and the modulus of OPFF-reinforced PVA at 25 phr were achieved. Scanning electron microscope (SEM) indicated that OPFF-reinforced PVA at 25 phr yielded no accumulation of OPFF fibers but showed the dispersion in the matrix phase. In conclusion, the OPFF derived from oil palm industry can be used as reinforcement for manufacturing of plant pot in the future stage

Effect on Flame Retardancy and Mechanical Properties of PA6 Nanocomposites with Addition of OMMT and PFR

2013 ◽  
Vol 712-715 ◽  
pp. 195-198
Author(s):  
Dong Mei Bao ◽  
Ji Ping Liu ◽  
Xiang Yang Hao
Keyword(s):  
Mechanical Properties ◽  
Flame Retardancy ◽  
Flexural Modulus ◽  
Polyamide 6 ◽  
X Ray Diffraction ◽  
Elongation At Break ◽  
Transmission Electron ◽  
Nanocomposite System ◽  
Organically Modified ◽  
Twin Screw

The organically modified montmorrillonite (OMMT)/phosphorus polymeic flame retardant (PFR)/polyamide 6(PA6) nanocomposites were prepared via melt intercalation on a twin-screw extruder. The structure formed in nanocomposite system was investigated by Fourier Transform Infrared Spectroscopy (FTIR), X-ray Diffraction (XRD), and Transmission Electron Microscopy (TEM). Properties such as flame retardancy, notched impact strength, tensile strength, elongation at break and flexural modulus were studied by limited oxygen index (LOI) approach, UL94, and mechanical property test. The results of the studies indicated that flame retardancy and mechanical properties of PA6 nanocomposites were all reinforced due to addition of OMMT and PFR.

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