Characterization of Mechanical and Thermal Properties of PP/Mineral Composites

2014 ◽  
Vol 1025-1026 ◽  
pp. 241-245 ◽  
Author(s):  
Ľudmila Dulebová ◽  
Emil Spišák ◽  
Branislav Duleba ◽  
František Greškovič ◽  
Tomasz Garbacz
Keyword(s):  
Mechanical Properties ◽  
Thermal Analysis ◽  
Mechanical And Thermal Properties ◽  
Screw Extruder ◽  
Twin Screw ◽  
Pp Composites ◽  
Mineral Fillers ◽  
The Impact ◽  
Properties Of Composites

The paper presents the impact of the use of fillers on the mechanical properties of composites with polymeric matrix from polypropylene (PP). Two main types of mineral fillers - talc and calcium carbonate - were used for experiments. PP composites of different percentage filler in matrix PP were compounded with twin-screw extruder and then injection molding. Properties of composites were investigated by tensile test and thermal analysis. Tensile strength was performed to determine and compare the mechanical properties of the unfilled PP and filled PP with various percentages of fillers. Thermal analysis by thermogravimetric was performed on the tested materials - weight loss, glass transition temperature, thermal decomposition, melting temperature.

Mechanical and thermal characterization of grafted PP-NCC nanocomposites

2019 ◽  
pp. 089270571987822
Author(s):  
Saud Aldajah ◽  
Mohammad Y Al-Haik ◽  
Waseem Siddique ◽  
Mohammad M Kabir ◽  
Yousef Haik
Keyword(s):  
Thermal Properties ◽  
Interfacial Adhesion ◽  
Thermal Characterization ◽  
Mechanical And Thermal Properties ◽  
Screw Extruder ◽  
Scanning Calorimetry ◽  
Three Point Bending ◽  
Twin Screw ◽  
Thermal Stability Of

This study reveals the enhancement of mechanical and thermal properties of maleic anhydride-grafted polypropylene (PP- g-MA) with the addition of nanocrystalline cellulose (NCC). A nanocomposite was manufactured by blending various percentages of PP, MA, and NCC nanoparticles by means of a twin-screw extruder. The influence of varying the percentages of NCC on the mechanical and thermal behavior of the nanocomposite was studied by performing three-point bending, nanoindentation, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and Fourier-transform infrared (FTIR) spectroscopy tests. The novelty of this study stems on the NCC nanoparticles and their ability to enhance the mechanical and thermal properties of PP. Three-point bending and nanoindentation tests revealed improvement in the mechanical properties in terms of strength, modulus, and hardness of the PP- g-MA nanocomposites as the addition of NCC increased. SEM showed homogeneity between the mixtures which proved the presence of interfacial adhesion between the PP- g-MA incorporated with NCC nanoparticles that was confirmed by the FTIR results. DSC and TGA measurements showed that the thermal stability of the nanocomposites was not compromised due to the addition of the coupling agent and reinforced nanoparticles.

Rheology, Morphology and Mechanical Properties of PA6/PP-g-MAH/POE Blends

2011 ◽  
Vol 366 ◽  
pp. 310-313
Author(s):  
Ming Tao Run ◽  
Meng Yao ◽  
Bing Tao Xing ◽  
Wen Zhou
Keyword(s):  
Mechanical Properties ◽  
Impact Strength ◽  
Screw Extruder ◽  
Reinforcing Agent ◽  
Twin Screw ◽  
Impact Tester ◽  
The Impact ◽  
Plastic Fluids ◽  
Morphology And Mechanical Properties ◽  
Toughening Agent

The rheology, morphology and mechanical properties of the PA6/PP-g-MAH/POE blends prepared by twin-screw extruder were studied by rheometer, scanning electron microscopy, universal tester and impact tester, respectively. The results suggest that the impact strength is improved by the POE acting as a toughening agent, while the compatibility of PA6 and POE is improved by the compatibilizer of PP-g-MAH. Furthermore, the PP-g-MAH component also acts as a reinforcing agent for decreasing the strength depression induced by the POE component. When POE content is about 9 wt% and PP-g-MAH content is about 10% in blends, the blend has the maximum tensile strength and impact strength. All melts of PA6/PP-g-MAH/POE blends are pseudo-plastic fluids. Both the POE and PP-g-MAH components can increase the apparent viscosity of the melt due to their facility of the linear molecular.

Characterization of size, aspect ratio and degree of dispersion of particles in filled polymeric composites using FIB

Clay Minerals ◽  
2009 ◽  
Vol 44 (2) ◽  
pp. 195-205 ◽  
Author(s):  
Y. Zhu ◽  
G. C. Allen ◽  
J. M. Adams ◽  
D. Gittins ◽  
P. J. Heard ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Aspect Ratio ◽  
Focused Ion Beam ◽  
Ion Beam ◽  
Polymeric Composites ◽  
Degree Of Dispersion ◽  
Transmission Electron ◽  
Twin Screw ◽  
Mineral Fillers

AbstractTwo types of mineral fillers, talc and mica, were compounded into polypropylene (PP) via a twin-screw extruder. The morphologies and mechanical properties of the resultant composites were investigated. The dispersion of minerals in PP was observed using Focused Ion Beam (FIB) techniques. The particle size distribution (PSD) and aspect ratio (AR) of particles in the polymer phase were obtained from FIB image analysis. It was found that FIB imaging displays directly the micron to mesoscale level dispersion of particles in polymeric composites. The technique has significant potential for characterizing such materials, having some advantages over ‘traditional’ scanning and transmission electron microscopy in terms of generating representative data in a realistic timescale. The PSD and AR distribution and degree of dispersion in the composites give insights into the modification of mechanical properties of the composites studied.

Morphological, mechanical, and thermal properties of PP/SEBS/talc composites

2019 ◽  
pp. 089270571987667 ◽  
Author(s):  
Carlos Ivan Ribeiro de Oliveira ◽  
Marisa Cristina Guimarães Rocha ◽  
Joaquim Teixeira de Assis ◽  
Ana Lúcia Nazareth da Silva
Keyword(s):  
Thermal Properties ◽  
Impact Resistance ◽  
Mechanical And Thermal Properties ◽  
Processing Conditions ◽  
Screw Extruder ◽  
Crystallinity Degree ◽  
Twin Screw ◽  
The Impact ◽  
Scanning Electron ◽  
Nucleating Effect

The aim of this study is to evaluate the effect of some experimental variables such as the content of styrene–ethylene–butylene–styrene (SEBS) and talc, processing conditions and mixing protocol on the properties of polypropylene (PP). To achieve this objective, PP/SEBS blends and PP/SEBS/talc composites were processed in a corotating twin-screw extruder. A masterbatch of PP/talc was prepared before the extrusion of PP/SEBS/talc composites. The morphology of blends and composites was evaluated by scanning electron microscopy, which revealed the dispersion of small rubber droplets in the PP matrix. Moreover, the micrographs also showed that SEBS and talc particles were uniformly dispersed and distributed in the polymer matrix. Results of thermal properties showed that talc had a nucleating effect, which promoted the increase of both PP crystallization temperature and crystallinity degree. The incorporation of talc in PP/SEBS blends led to an expressive increase in the impact resistance by 70% as compared with the reference blend: PP/SEBS 80/20% (w/w). This result reveals that although the PP/SEBS/talc composites showed a separated morphology, the good dispersion and distribution of this mineral filler in the polymers contributed to avoid crack propagation and increase the impact properties. The tensile properties in the elastic region were not significantly affected.

Mechanical Properties of Polyamide 6 (Pa6) / Ethylene Vinyl Acetate (Eva) / Sepiolite Composite

2014 ◽  
Vol 554 ◽  
pp. 62-65 ◽  
Author(s):  
Noora Tiqah Mohamad Fauzi ◽  
Zurina Mohamad
Keyword(s):  
Mechanical Properties ◽  
Impact Strength ◽  
Vinyl Acetate ◽  
Ethylene Vinyl Acetate ◽  
Polyamide 6 ◽  
The Other ◽  
Screw Extruder ◽  
Twin Screw ◽  
Moulding Machine ◽  
The Impact

The objective of this study is to investigate the effect of sepiolite concentration (2-10 phr) on the mechanical properties of polyamide 6 (PA6) / ethylene vinyl acetate (EVA) blend at the ratio 80/20. Twin screw extruder and injection moulding machine were used to prepare the samples. The strength and modulus of flexural was increased until 6 phr of sepiolite content. On the other hand, the impact strength of PA6/EVA/sepiolite composite was decreased gradually as sepiolite content increased.

Effects of Wood Powder on Mechanical Properties of PP/Wood Powder Composites

2011 ◽  
Vol 194-196 ◽  
pp. 1536-1541
Author(s):  
Cheng Bing Yu ◽  
Yin Yu Rui ◽  
Sai Sai Chen ◽  
Xia Lv ◽  
Xi Lin Lv
Keyword(s):  
Mechanical Properties ◽  
Coupling Agent ◽  
Impact Testing ◽  
Twin Screw Extruder ◽  
Wood Powder ◽  
Screw Extruder ◽  
Twin Screw ◽  
Interfacial Compatibility ◽  
Powder Composites ◽  
Properties Of Composites

Effects of wood powder (WP) on mechanical properties of PP/WP composites were studied, and interfacial compatibility between polypropylene (PP) and WP was investigated with SEM. All PP/WP composites were compounded in a parallel twin-screw extruder. Mechanical properties of composites were characterized by tensile, hardness, and impact testing. The result showed that interfacial compatibility in PP/WP composite was ameliorated efficiently by PP-g-(MAH-St) compatilizer, mechanical properties of PP/WP composites were improved by pre-treating WP with alkali and coupling agent. They were also influenced by WP size and WP amount, which were the best at the size of 60-mesh and the amount of 40 wt%.

Mechanical Properties of Fumed Silica/PP Composites

2014 ◽  
Vol 665 ◽  
pp. 319-322
Author(s):  
Hai Qing Ma ◽  
Zheng Jin ◽  
Wen Long Li ◽  
Di Wu ◽  
Jing Zhao
Keyword(s):  
Mechanical Properties ◽  
Fumed Silica ◽  
Polarized Light ◽  
Silica Content ◽  
Mixing Process ◽  
Melt Mixing ◽  
Dispersion Degree ◽  
Twin Screw ◽  
Pp Composites ◽  
Properties Of Composites

Polypropylene/fumed silica composites were prepared via melt mixing using a twin-screw co-rotating extruder. To improve the dispersion degree of the fumed silica, γ-aminopropyl triethoxy silane (KH-550) was used as silane coupling agent. The PP composites which obtained different fumed silica content were prepared by melt-mixing process. Then composites mechanical properties were measured by the crystal polarized light microscopy (PLM), hardness, tensile testing and so on. The results indicate that fumed silica could toughen PP resin and mechanical properties of composites were optimum when fumed silica content was 1.5 wt%.

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.

Study of the Degradability of PA6/Organoclay Nanocomposites

2016 ◽  
Vol 869 ◽  
pp. 288-292 ◽  
Author(s):  
Thamyres Cardoso de Carvalho ◽  
Erbertt Barros Bezerra ◽  
Renê Anísio da Paz ◽  
Amanda Melissa Damião Leite ◽  
Vanessa Nóbrega Medeiros ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Polyamide 6 ◽  
Ammonium Bromide ◽  
X Ray Diffraction ◽  
Screw Extruder ◽  
X Ray ◽  
Twin Screw ◽  
Organophilic Clay ◽  
The Impact ◽  
Hexadecyltrimethyl Ammonium Bromide

The study of the degradability of PA6 / organoclay nanocomposites was evaluated to minimize the effects of plastic waste in the environment. The use of clays usually accelerates the degradation of nanocomposites. A regional clay (polyamide 6, Polyform - B300) and a quaternary ammonium salt (Cetremide (hexadecyltrimethyl ammonium bromide) were used. The hybrids were obtained in a co-rotating twin screw extruder and the tensile and the impact specimens were obtained through injection. The infrared spectroscopy (FTIR) and the X-ray diffraction (XRD) confirmed the presence of the salt molecules in the modified bentonite and its organophilization. The XRD results of the hybrids indicate that the peak of the organophilic clay disappeared when incorporated into the polyamide, showing that all systems were exfoliated and/or partially exfoliated structure. The nanocomposites showed higher tensile mechanical properties when compared to the properties of pure polyamide, and the various conditions of aging influenced the degradation of these materials.

Preparation and characterization of biopolymer nanocomposites from cellulose nanofibrils and nanoclays

2017 ◽  
Vol 52 (5) ◽  
pp. 689-700 ◽  
Author(s):  
Gulyaz Al ◽  
Deniz Aydemir ◽  
Bulent Kaygin ◽  
Nadir Ayrilmis ◽  
Gokhan Gunduz
Keyword(s):  
Thermal Analysis ◽  
Polylactic Acid ◽  
Cellulose Nanofibrils ◽  
Tensile Modulus ◽  
Morphological Characterization ◽  
Morphological Properties ◽  
Screw Extruder ◽  
Twin Screw ◽  
Thermal Stability Of

The aim of this study was to investigate the effects of cellulose nanofibrils and nanoclays on the mechanical, thermal, and morphological properties of polyhydroxybutyrate and polylactic acid bio-polymers. Polyhydroxybutyrate and polylactic acid as a polymer matrix and nanoclays and cellulose nanofibrils as reinforcing nano-fillers were used to prepare the biopolymer nanocomposites in twin screw extruder. Density, flexure strength and flexure modulus, tensile strength and tensile modulus, impact strength, thermal properties, and morphological characterization of the obtained biopolymer nanocomposites were determined. According to the obtained results, densities of the biopolymer nanocomposites were found to decrease with addition of the bio-fillers, and it was determined to be decreasing the density due to increasing the porosity in biopolymer nanocomposites. Although the increasing in the porosity of biopolymer nanocomposites was found in scanning electron microscope pictures, the mechanical properties of the biopolymer nanocomposites generally increased as compare with neat bio-polymers. Thermal analysis conducted with thermogravimetric-dynamic thermal analysis and differential scanning calorimeter showed that thermal stability of the biopolymer nanocomposites generally improved according to the neat bio-polymers.

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