Performance of Polypropylene Composites: Impact of Coupling Agent and Waste Filler Content (original) (raw)

Comparisons of Polypropylene Composites : The Effect of Coupling Agent on Mechanical Properties

2017

The aim of this work is to compare the glass fiber (GF)/polypropylene (PP) and black rice husk (BRH)/black rice husk ash (BRHA)/polypropylene (PP) composites on mechanical properties. Tensile, flexural and falling weight impact test was conducted to investigate the effect of filler content and coupling agent (MAPP) on the mechanical properties of the BRH/BRHA/PP composites. Using a coupling agent, the mechanical properties of glass fiber reinforced material is intended to reach. By incorporating up to 10% (by weight) fillers, the tensile strength of GF/PP increased by 21%, BRH/PP and BRHA/PP were decreased by 20% and 10%, respectively, compare to neat polypropylene. Using MAPP provided to enhance the tensile strength of BRH/PP and BRHA/PP composites. And also the effect of water absorption on GF/BRH/BRHA was investigated. Results showed that increasing BRH and BRHA concentration and increasing water contact time greatly increase water absorption. Keyword: composites, mechanical prop...

Physicomechanical behavior of composites of polypropylene, and mineral fillers with different process cycles

DYNA, 2018

In this work, a development of composites of polypropylene [PP] with mineral fillers [M] of talc and calcium carbonate [CaCO3] by co-extrusion and injection techniques were carried out. In the preparation of the mixtures, was used the rheometric analysis to define the optimum temperature of the extrusion process, and a weight ratio of 80:20 PP: fillers was maintained, while for the injection molding process six generations of PP and its compounds were obtained to study the rheological, thermal, morphological and mechanical properties of the new series of PPnM composites formed from a recycled matrix and the PPMn series reprocessed compounds for up to six cycles. The results allowed correlating the changes due to the thermal history and the influence of adding the mineral fillers. The mechanical characterization in the reprocessed matrix indicated a 6.0% decrease in tensile strength and an increase in flexural strength of 9.9%. Likewise, the compounds showed an increase in tensile st...

Influence of coupling agents in the preparation of polypropylene composites reinforced with recycled fibers

Chemical Engineering Journal, 2011

The use of coupling agents based on polyolefins is an interesting strategy for the preparation of composites with marked different chemical structure between their components. That is the case of polypropylenebased composites reinforced with lignocellulose fibers. In this work a deep study of the influence of the intrinsic parameters of maleated polypropylene (MAH-PP) has been carried out in order to determine the effect of its acid number as well as molecular weight in mechanical properties of composites reinforced with low cost reinforcements, under tensile, flexural and impact stresses, flow capacity, water absorption behavior and surface morphology. The use of high functionalized MAH-PP coupling leaded to important improvements in mechanical stresses and also a lower capacity of water absorption due to the formation of thinner interfaces. In the case high molecular weight MAH-PP agents, even higher than plain polymer matrix, conducted to an interesting increase in unnotched Charpy Impact Strength attributed to a low dispersion of the coupling agent in the matrix during mixing process keeping microdomains that help to avoid crack propagation.

Improvement of mechanical properties of polypropylene composite using filler, modifier and reinforcement Improvement of mechanical properties of polypropylene composite using filler, modifier and reinforcement

Journal of Physics: Conf. Series , 2018

This study focuses on improvement of mechanical and physical properties of polypropylene (PP) composite using filler, modifier and jute fiber as reinforcement. Rice husk ash (RHA), low-density polyethylene (LDPE) and jute fiber were used as filler, modifier, and reinforcement in the PP matrix, respectively. A series of test specimens were using various compositions of PP, fillers, modifiers, and reinforcement. Materials were mixed using two roll mixing machine, and specimens were prepared using injection molding machine. The specimens were evaluated on the basis of mechanical (tensile strength, elongation at break) and Physical (water absorption) properties. Effect of RHA was assessed on the basis of mechanical properties. Surface property of the PP composites was studied using Scanning Electron Microscope (SEM). The water absorption property of composites with various compositions was investigated. Further attempts had been made to optimize the three process parameters (RHA, LDPE, jute fiber) in the PP composite with respect to its tensile strength. The optimum parameters for the PP composite were found to be 10 wt% RHA, 10 wt% LDPE and 25 wt% jute reinforcement, respectively in the PP matrix.

Effect of the Matrix Melt Flow Index and Fillers on Mechanical Properties of Polypropylene-Based Composites

Materials

In this work, mechanical properties of reinforced polypropylene composites were studied. PP in particulates shape with two different melt flow indexes (MFI) was used, i.e., 3 and 23 g/10 min, namely PP3 and PP23, respectively. Three different materials, namely TiO2 nanoparticle (nTiO2, spherical, 0D), micro-size short carbon fiber (SCF, fiber, 1D), and graphite nanoplatelet (GNP, sheet, 2D), were used as reinforcements/fillers. PP and fillers (in the desired composition) were first pre-mixed by a mechanical mixer. The mixture was then fed to a co-rotating twin-screw extruder for melt-compounding, followed by injection molding to fabricate testing samples. The microstructure and fracture surface of the composites were observed by a scanning electron microscope (SEM). Additionally, tensile, flexural, impact, and hardness tests were conducted to evaluate their mechanical properties. The SEM images stipulate that PP23 had better adhesion and dispersion with the fillers. The results from...

The Investigation of Mechanical Properties of Polypropylene Fiber-Reinforced Composites Produced With the Use of Alternative Wastes

Politeknik Dergisi

Various studies on the disposal or storage of the wastes generated due to mining activities have been carried out until today. With the developing technology, the use of alternative products instead of aggregates in Composite and the effect of fiber addition were investigated. The most common of these studies is the bending strength tests on the beam sample. In this study, solid wastes generated by mining operations were used instead of aggregate used in Composite. Beam samples were poured with the dimensions of 40×40×160 mm by adding 4-6 kg/m3 polypropylene fiber to the mixture obtained by using these solid wastes; then, its effects on ultrasonic pulse velocity test, tensile test, and compressive strength tests were conducted. According to the results of these tests, it was found that the fibers had a positive effect on compressive strength and bending strength. Also, it was found that water absorption rates and densities did not have an effect, while the ultrasonic pulse velocity ...

Polypropylene Blends and Composite: Processing-Morphology-Performance Relationship of Injected Pieces

Polypropylene [Working Title], 2019

Polypropylene (PP) is a low-cost plastic commodity, which currently is in a transition zone between massive use and engineering applications due mainly to its limited mechanical properties, such as low tensile and impact resistance. That is the reason why PP is usually modified with additives and particles to improve its mechanical and thermal performance and thus meet the requirements demanded by engineering applications. Besides, PP composites are suitable materials to be processed by a simple, fast, automatic, and massive technique such as injection molding. This makes PP composites attractive for several applications. However, it is important to keep in mind that PP composites' performance depends not only on their intrinsic properties but also on processing conditions. This chapter will summarize the relationship between processing and performance of several PP composite-micro, nano, and hybrid-injected parts with the aim of generating a bridge between technologic knowledge and scientist knowledge.

Study of the Technical Feasibility of the Use of Polypropylene Residue in Composites for Automotive Industry

Plastics in the Environment [Working Title], 2018

Polypropylene (PP) is widely used in short-term use artifacts, rapidly discarded and should partially replace neat PP. In addition, it is one of the polymers most used in the automobile industry. This study shows the technical feasibility of partially substituting neat PP for a post-consumer counterpart (PP r), as well as adding ground glass (GP), used as filler in the polymer matrix. Mechanical and thermal properties of the recycled blends (PP/PP r) and composites (PP/PP r /GP) were evaluated. The results demonstrated that the blend with the highest PP r content obtained a statistically significant decline in elastic modulus, but adding 5 wt% of GP to this blend increased this property, achieving a similar value in relation to neat PP. The composite developed may be a promising tailor-made product with properties resembling those of the virgin plastic. Thus, the automotive industry seems to be a good option for the use of PP r and GP composites and blends, without increasing product requirements.

Thermomechanical and Rheological Behaviours of Waste Glass Fibre-Filled Polypropylene Composites

Engineering Journal, 2009

The composites between the reinforced glass fibre wastes obtained from surfboard manufacturing industry and polypropylene were developed for value adding and environmental reasons. The thermomechanical and rheological behaviours of the composites were investigated. Glass fibre contents were varied from 5 to 30wt%. The effects of maleic anhydride grafted polypropylene (MA-PP) compatibilizer on the behaviours were also determined. The results revealed that the addition of glass fibre was able to reduce the heat of fusion of the composite. Additionally, the tensile and flexural properties were increased with increasing the glass fibre contents following the rule of mixtures. The addition of MA-PP led to enhance tensile and flexural properties due to the improvement of the adhesion between matrix and glass fibre, which is correlated with morphological observations. From the rheological studies, the apparent flow activation energy revealed that the addition of glass fibre decreased the fluidity of the molten composite materials; however, it could be slightly improved by using MA-PP.

The effect of various compatibilizers on mechanical properties of polystyrene/polypropylene blend

Polymer Testing, 2002

The effect of various compatibilizers on the mechanical properties of polystyrene/polypropylene (PS/PP) blends was investigated. Blends of 20/80, 50/50 and 80/20 (wt%) were prepared through melt blending in a single screw extruder at a blend temperature of 200°C and a screw speed of 40 rpm. Four compatibilizers, viz. polystyrene-block-poly (ethylene-butylene)-block-polystyrene (SEBS), Surlyn, ethylene vinyl acetate (EVA) and sodium salt hydrate of 4 styrenesulfonic acid (4ssa,ssh) with concentration of 7.5% w/w were used. The tensile strength, elongation at break, Young's modulus and impact strength of binary and ternary blends were compared. The blends containing SEBS and EVA showed a positive effect on the ductility of the blend. In the presence of Surlyn the strength of the blend increased, whereas 4 ssa,ssh showed a negative effect.