Study on the Properties of LDPE/POE/Zeolite Molecular Sieves Composite Film

2011 ◽  
Vol 194-196 ◽  
pp. 2347-2350 ◽  
Author(s):  
Zi Nian Zhao ◽  
Xin Xin Nie ◽  
Rui Wang
Keyword(s):  
Mechanical Properties ◽  
Composite Film ◽  
Molecular Sieves ◽  
Testing Machine ◽  
Melt Blending ◽  
Screw Extruder ◽  
Scanning Calorimetry ◽  
Twin Screw ◽  
Ethylene Octene Copolymer ◽  
Blending Process

By means of melt blending process in a co-rotating twin screw extruder with two-step process, the low density polyethylene (LDPE)/ethylene octene copolymer (POE)/zeolite molecular sieves (ZMS) composites were prepared. The influence of ZMS on the crystallinity, mechanical properties and permeability was investigated by differential scanning calorimetry(DSC), universal testing machine and permeability tester, respectively. The results showed that the addition of ZMS made the crystallinity of composite film decreased and the growth rate of crystal nucleus promoted. As the content of ZMS rose, the mechanical properties of composite film decreased, while the CO2, O2permeability and the moisture permeability increased.

Crystallization Behavior and Mechanical Properties of PP/EVA Blends

2014 ◽  
Vol 1033-1034 ◽  
pp. 869-872
Author(s):  
Kun Yan Wang
Keyword(s):  
Mechanical Properties ◽  
Crystallization Behavior ◽  
Ethylene Vinyl Acetate ◽  
Melt Blending ◽  
X Ray Diffraction ◽  
Screw Extruder ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Blending Method ◽  
Twin Screw

Polypropylene (PP)/ethylene-vinyl acetate (EVA) blends were prepared using a twin-screw extruder by melt blending method. The influences of the EVA contents in PP/EVA blends on crystallization behavior and mechanical properties were investigated by X-ray diffraction (XRD) and differential scanning calorimetry (DSC). XRD results show that the EVA not change the crystal structure in the blends but only decrease the intensity of the diffraction peak. DSC results showed that the melting point and crystallization point decreased when EVA added to the blend. The tensile properties of PP/EVA blend become much better.

Toughening Modification of Poly(butylene terephthalate)/Polycarbonate Blends by Poly(ethylene-co-octene)

2005 ◽  
Vol 13 (4) ◽  
pp. 385-394
Author(s):  
Huiyu Bai ◽  
Yong Zhang ◽  
Yinxi Zhang ◽  
Xiangfu Zhang ◽  
Wen Zhou
Keyword(s):  
Average Diameter ◽  
Melt Blending ◽  
Screw Extruder ◽  
Scanning Calorimetry ◽  
Bisphenol A Polycarbonate ◽  
Elongation At Break ◽  
Butylene Terephthalate ◽  
Twin Screw ◽  
Poly Ethylene ◽  
The Impact

New toughened poly(butylene terephthalate) (PBT)/bisphenol A polycarbonate (PC) blends were obtained by melt blending with commercial poly(ethylene-co-octene) copolymer (POE), varying the POE content up to 10 wt%, in a twin screw extruder, followed by injection moulding. The influence of POE on the properties of the PBT/PC blends was investigated in terms of mechanical testing, dynamic mechanical thermal (DMTA) analysis, differential scanning calorimetry (DSC), and scanning electronic microscopy (SEM). The results showed that addition of POE led to remarkable increases in the impact strength, elongation at break and Vicat temperature, and a reduction in the tensile strength and flexural properties of PBT/PC blends. The morphology of the blends was observed using SEM and the average diameter of the dispersed phase was determined by image analysis. The critical inter-particle distance for PBT/PC was determined.

Tuning of HDPE Properties for 3D Printing

2018 ◽  
Vol 773 ◽  
pp. 67-71 ◽  
Author(s):  
Paweesinee Chatkunakasem ◽  
Panisa Luangjuntawong ◽  
Aphiwat Pongwisuthiruchte ◽  
Chuanchom Aumnate ◽  
Pranut Potiyaraj
Keyword(s):  
3D Printing ◽  
Melt Flow Index ◽  
Flow Index ◽  
Melt Blending ◽  
X Ray Diffraction ◽  
Screw Extruder ◽  
Scanning Calorimetry ◽  
Crystalline Polymers ◽  
Twin Screw ◽  
Low Crystalline

The objective of this study is to improve high density polyethylene (HDPE) properties for 3D printing by addition of graphene and low density polyethylene (LDPE). Graphene was prepared by modified Hummer’s method. The prepared graphene was characterized by the infrared spectroscopy and the X-ray diffraction analysis (XRD). Graphene/HDPE and LDPE/HDPE composites were successfully prepared through the melt-blending technique using a twin-screw extruder. The melt flow index (MFI) and differential scanning calorimetry (DSC) were employed to characterize neat HDPE and the modified HDPE. FTIR and XRD results show that graphite was successfully changed into graphene completely and MFI of graphene/HDPE and LDPE/HDPE decreased as the amount of graphene and LDPE in the composite blends increased. DSC results show that the addition of low crystalline polymers can reduce a crystallization temperature and crystallinity content.

Morphological, Thermal and Mechanical Properties of Poly(Lactic Acid)/Cellulose/ Nano-Clay Composite

2020 ◽  
Vol 856 ◽  
pp. 331-338
Author(s):  
Sirisart Ouajai ◽  
Suttinun Phongtamrug
Keyword(s):  
Mechanical Properties ◽  
Flexural Modulus ◽  
Poly Lactic Acid ◽  
Thermal And Mechanical Properties ◽  
Screw Extruder ◽  
Scanning Calorimetry ◽  
Chemically Modified ◽  
Nano Clay ◽  
Twin Screw ◽  
Modified Cellulose

This research has focused on the effect of modified cellulose and clay on the thermal and mechanical properties of PLA bio-nanocomposite. Cellulose was chemically modified with silane coupling agent in order to enhance compatiblization with PLA. Successful modification was confirmed by Fourier Transform Infrared Spectroscopy and EDX-SEM. PLA was compounded with various amounts and ratios of the modified cellulose and clay by a twin-screw extruder. Thermal properties of the bio-nanocomposites were characterized by Thermogravimetric Analysis and Differential Scanning Calorimetry. Glass transition temperature of the bio-nanocomposite slightly decreased whereas melting temperature remained constant when the amount of both fillers was increased. In addition, crystallization behaviour of PLA has been influenced by the type and amount of the fillers. Clay showed a greater effect on the crystallization of PLA than the modified cellulose and unmodified one, respectively. The flexural modulus of the composite containing equal amount between clay and cellulose was increased with an increasing in fillers contents. But the flexural and impact strength of composite were gradually decreased with an increase in fillers contents. Variation of clay and cellulose ratio resulted in the change of mechanical properties. The composite containing higher ratio between clay:cellulose or cellulose:clay showed a better mechnical properties comparing to the ratio of clay:cellulose equal to 1:1.

Preparation and Properties of PA66/PP/MOS Whisker Composites

2011 ◽  
Vol 311-313 ◽  
pp. 20-25
Author(s):  
Jian Peng ◽  
You Ming Cao
Keyword(s):  
Flame Retardant ◽  
Coupling Agents ◽  
Melt Blending ◽  
Screw Extruder ◽  
Standard Samples ◽  
Scanning Calorimetry ◽  
Flame Retardant Property ◽  
Twin Screw ◽  
Magnesium Oxysulfate ◽  
Flame Retardant Properties

The composites composed of polyamide66（PA66）, polypropylene（PP）, and magnesium oxysulfate whisker(MOS) were prepared by means of melt blending through co-rotation twin screw extruder. The standard samples were prepared by injection machine. The effect of coupling agents on the whisker surface, and the influence of MOS content on mechanical properties, heat properties, flame-retardant properties and the microstructure of the composites were investigated by scanning electron microscopy(SEM), thermogravimetry(TG) and differential scanning calorimetry(DSC) techniques, respectively. The results showed that the MOS whisker modified with coupling agents KH570 possesses better activation exponential and dispersity, and the tensile strength, flexural strength and toughness of PA66/PP/MOS composite were firstly increased and then decreased with the MOS content increasing, the optimum adding amount of MOS was 25phr. The flame retardant property was improved remarkable by adding of MOS.

Electron Beam Crosslinking of EVA/ENR-50/HNTS Nanocomposites in the Presence of Trimethylol Propane Triacrylate, TMPTA

2014 ◽  
Vol 970 ◽  
pp. 84-87 ◽  
Author(s):  
Amirah Kamal Rudin ◽  
Zurina Mohamad ◽  
Chantara Thevy Ratnam ◽  
Aznizam Abu Bakar
Keyword(s):  
Tensile Strength ◽  
Electron Beam ◽  
Irradiation Dose ◽  
Room Temperature ◽  
Ethylene Vinyl Acetate ◽  
Melt Blending ◽  
Screw Extruder ◽  
Twin Screw ◽  
Blending Process ◽  
Trimethylol Propane

Ethylene vinyl acetate/ Epoxidised natural rubber/ Halloysite nanotube (EVA/ENR-50/HNT) nanocomposite was prepared through melt blending process using twin screw extruder at 120 oC and 50 rpm of screw speed. The ratio of EVA/ENR-50/HNT was fixed at 80:20:4. The nanocomposites were irradiated with a 3.0 MeV electron beam machine at doses ranging from 50 to 200 kGy in air at room temperature. The effect of irradiation dose and co-agent Trimethylol Propane Triacrylate (TMPTA) on tensile strength and gel content of EVA/ENR-50/HNT nanocomposite were studied. It was found that the tensile strength and gel fraction of the EVA/ENR-50/HNT nanocomposites increased with the increased of irradiation dose. In the presence of TMPTA, a better performance in tensile strength was achieved due to the increased efficiency of irradiation induce crosslinking of EVA/ENR-50/HNT nanocomposite.

Effects of Phthalocyanine Blue and Ultramarine Blue Pigments on Nucleation of Polypropylene

2012 ◽  
Vol 488-489 ◽  
pp. 473-477 ◽  
Author(s):  
Onusa Saravari ◽  
Kodchagorn Keeratichiraththitikan ◽  
Noppadon Kerddonfag ◽  
Wannee Chinsirikul
Keyword(s):  
Nucleating Agent ◽  
Blue Pigment ◽  
Melt Blending ◽  
X Ray Diffraction ◽  
Screw Extruder ◽  
Scanning Calorimetry ◽  
Single Screw ◽  
Ultramarine Blue ◽  
Single Screw Extruder ◽  
Blending Process

This study investigated the effect of the organic phthalocyanine blue and inorganic ultramarine blue pigments on nucleation of polypropylene (PP). The PP/pigment pellets containing various concentrations of each pigment (0.0001-0.1 wt %) were prepared by a melt blending process using a single-screw extruder, followed by fabricating into thin sheets using a single-screw plastic sheet extruder. The nucleation effects of both pigments were characterized by wide angle X-ray diffraction (WAXD), and differential scanning calorimetry (DSC) techniques. The WAXD patterns revealed that the addition of phthalocyanine blue or ultramarine blue did not affect the crystal structure of PP. The DSC results indicated that both pigments were able to nucleate PP, where the organic phthalocyanine blue pigment was a very efficient nucleating agent, increasing the crystallization temperature of PP by 15oC. The results of tensile and optical tests showed that the tensile strength and clarity of PP were improved with phathalocyanine blue addition.

scholarly journals PP-CBW/m-LLDPE/micro-CaCO3 composite films manufactured from bumper waste by blown film extrusion

2019 ◽  
Vol 281 ◽  
pp. 03001 ◽  
Author(s):  
Nancy Zgheib ◽  
Sylvain Seif ◽  
Nemr El Hajj
Keyword(s):  
Mechanical Properties ◽  
Composite Films ◽  
Screw Extruder ◽  
Scanning Calorimetry ◽  
Single Screw Extruder ◽  
Blown Film ◽  
Twin Screw ◽  
Mulch Films ◽  
Blown Film Extrusion ◽  
The Impact

The synthesis of polypropylene-based car bumper waste (PP-CBW)/metallocene linear low-density polyethylene (m-LLDPE)/micro-CaCO3 composite films for agriculture mulch films applications has been thoroughly investigated during this study. The chemical composition of these wastes was determined by Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). Three blends of various compositions were prepared using a twin-screw extruder, the pellets were then blown into films using a single screw extruder. The mechanical properties of the films were then studied and compared with the EN 13655, 2002 standards for agriculture mulch films applications. The results indicated that the use of an anhydride grafted polypropylene (MAH-g-PP) as compatibilizer improves the adherence at the interface between the polar acrylic paints present in the car bumper waste and the polymer matrix. Also, the presence of stearic acid surface treated micro-CaCO3 improves considerably the mechanical properties of the composite when the amount of PP-CBW is less than 13 wt%. Using higher amount of PP-CBW improves the tear resistance properties in TD and MD but fails to increase the impact strength and the tensile properties in MD and TD.

Effect of the Citric Acid as Blowing Agent on the Compressive Properties and Morphology of PLA/ENR Blend Foams

2017 ◽  
Vol 873 ◽  
pp. 95-100
Author(s):  
Sumate Ouipanich ◽  
Thiti Kaisone ◽  
Pran Hanthanon ◽  
Chanon Wiphanurat ◽  
Yupawan Thongjun ◽  
...  
Keyword(s):  
Citric Acid ◽  
Testing Machine ◽  
Morphological Properties ◽  
Compressive Properties ◽  
Screw Extruder ◽  
Scanning Calorimetry ◽  
Blowing Agents ◽  
Universal Testing ◽  
Hydrogen Carbonate ◽  
Twin Screw

The effect of a blowing agents that affected Polylactic acid (PLA) and Epoxidized natural rubber (ENR) the blowing agents composed of citric acid (CA) and sodium hydrogen carbonate (NaHCO3) mixing by twin screw extruder with co-rotation screw. The properties of biodegradable foams were investigated. Blended foams of all composition were prepared by using compression molding at 200°C using different proportions of PLA, ENR, CA and NaHCO3. Mechanical properties of the samples were characterized by using universal testing machine. Thermal properties including Glass transition temperature (Tg), crystallization temperature (Tc) and melting temperature (Tm) were examined by using differential scanning calorimetry (DSC). Physical properties including morphology and density of blended foams were also investigated and morphological properties were studied with a scanning electron microscope (SEM).

scholarly journals Nylon 66/nano CaCO3 composites

2018 ◽  
Vol 1 (1) ◽  
Author(s):  
Peipei Yuan ◽  
Jianshu Zhong ◽  
Xisheng Liu
Keyword(s):  
Calcium Carbonate ◽  
Crystallization Temperature ◽  
Polarized Light ◽  
Decomposition Temperature ◽  
Melt Blending ◽  
Screw Extruder ◽  
Scanning Calorimetry ◽  
Nylon 66 ◽  
Twin Screw ◽  
Half Height Width

The nylon 66/nano-CaCO3 composites were prepared by melt blending on a twin-screw extruder. Scanning electron microscopy (SEM), polarized light microscopy (PLM), thermal loss (TGA) and differential scanning calorimetry (DSC) The effects of nanometer calcium carbonate on the polycrystalline behavior and thermal properties of nylon 66/nano CaCO3 composites were investigated. The results show that the nanometer calcium carbonate particles are dispersed in the nylon 66 matrix and exist in the form of aggregates. The nanometer calcium carbonate has the effect of heterogeneous nucleation, which can reduce the size of the spherules. The decomposition temperature of the nylon 66 is 400 ℃, the addition of nano-CaCO3 to reduce the decomposition temperature. At the same time, DSC test showed that the β-crystalline form in the material reduced the melting temperature of the material. The addition of nano-CaCO3 in the nylon 66 matrix resulted in the decrease of the crystallization temperature and the increase of the half-height width of the endothermic peak. The lower the crystallization temperature, the wider the crystallization temperature range.

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