STUDY OF TALC FILLED POLYPROPYLENE- A CONCEPT FOR (original) (raw)
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STUDY OF TALC FILLED POLYPROPYLENE- A CONCEPT FOR IMPROVING MECHANICAL PROPERTIES OF POLYPROPYLENE
IJRET, 2013
Talc is a important filler for polypropylene (PP) and Non halogen flame retardants (ammonium polyphosphate) is used with PP. It does not generate toxic gases and corrosive smokes during combustion. The addition of flame retardants will lower the flammability of PP. Talc improves the mechanical properties (stiffness, flexural strength, modulus etc) and heat deflection temperature. Two types of mechanical testing have been done to determine the mechanical properties, which are flexural test and tensile test .In this study, the improvement of mechanical properties have shown with increasing suitable percentage (by weight) of talc for a new applications
Effect of the talc filler content on the mechanical properties of polypropylene composites
Journal of Applied Polymer Science, 2008
This research examines the effect of a microsize/nanosize talc filler on the physicochemical and mechanical properties of filled polypropylene (108MF10 and 33MBTU from Saudi Basic Industries Corp. and HE125MO grade from Borealis) composite matrices. A range of mechanical properties were measured [tensile properties, bending properties, fracture toughness, notched impact strength (at the ambient temperature and À20 C), strain at break, and impact strength] along with microhardness testing and thermal stability testing from 40 to 600 C as measured by differential thermal analysis and thermogravimetric analysis. Increasing filler content lead to an increase in the mechanical strength of the composite material with a simultaneous decrease in the fracture toughness. The observed increase in tensile strength ranged from 15 to 25% (the maximum tensile strength at break was found to be 22 MPa). The increase in mechanical strength simultaneously led to a higher brittleness, which was reflected in a decrease in the mean impact strength from the initial 18 kJ/m 2 (for the virgin polypropylene sample) to 14 kJ/m 2 , that is, a 23% decrease. A similar dependency was also obtained for the samples conditioned at À20 C (a decrease of 12.5%). With increasing degree of filling of the talc-polypropylene composite matrix, the thermooxidative stability increased; the highest magnitude was obtained for the 20 wt % sample (decomposition temperature ¼ 482 C, cf. 392 C for the virgin polymer). V
Polymer sciences, 2017
Talc represents one of the most useful mineral fillers which are compatible with the polypropylene (PP). It is characterized with its lamellar structure. The introduction of 30% by weight of talc, three types differing with the particle size d 50 and the composition, has not only a positive influence on stiffness and crystallinity but also it decreases the impact strength and tenacity. The abrasive wear behavior depends mainly on the particle size of talc. Microscopic observations revealed that the talc layers are aligned along the injection flow direction, and uniformly dispersed in the PP matrix.
Effect of Titanate Coupling Agent on the Mechanical Properties of Talc Filled Polypropylene
Composites of polypropylene filled with untreated and treated talc have been prepared. The surface modification of talc was done by using titanate coupling agent (TCA). The effect of this treatment on the interfacial adhesion of filler particles in the polymeric matrix was evaluated by mechanical analysis. The results obtained indicate that incorporation of non treated talc generally decreased the mechanical properties of the composites except the modulus. However, the use of treated talc increased the amount of filler that was incorporated in the polymeric matrix. Therefore the Mechanical properties such as tensile strength, flexural strength, elongation at break and impact strength are also improved.
EFFECT OF TALC ON BENDING STRENGTH OF POLYPROPYLENE COMPOSITES
TJPRC, 2013
In this study the Polypropylene (PP) was taken as a base material. The PP composites were made with talc at various concentrations by weight. The specimens used for the experiments were made on Injection moulding machine (De- Tech 60LNC5 made by Larsen & Tubro). To obtain the test specimens the die was clamped onto the injection mould-ing machine. The talc was added and mixed manually in 10, 20 & 30% by weight and the specimens were made at 4, 5 & 6 MPa injection pressures. For performing the bending strength tests a NETZSCH bending stress test machine manufactured by GERATEBAU was used.
Polymers for Advanced Technologies, 2008
Intumescent systems have been developed since many years for a wide range of applications, even if they are mainly used in coatings nowadays. The objective of this paper is to determine if the intumescent concept can be applied to highly filled reinforced polypropylene (PP) composites containing talc. Formulations that meet the electrical industry requirements have been developed, even if it has been observed that the addition of talc into intumescent PP leads to a decrease in the fire retardancy of the systems. A thermal stabilization of the material is noted at high temperature in the presence of talc. An increase in the crystallinity of the intumescent structure is suspected to be, at least partially, responsible for the decrease in the performance.
The effect of polyethylene on the properties of talc-filled recycled polypropylene
Plastics, Rubber and Composites, 2020
The reinforcement of recycled polypropylene (rPP) with mineral fillers, to obtain modulus values of 3000-4000 MPa has proven challenging for recyclers, whereas this is common practice for virgin PP. The main difference between recycled and virgin PP is the contaminating presence of other polymers. In this study, the composition of rPP sourced from electrical and electronic waste was analytically estimated. The rPP was found to be a PP/HDPE blend with ca. 90/10 m% ratio. Furthermore, the effect of HDPE on the thermal and physical properties of talc-filled PP was investigated by means of re-engineered blends and talc-filled compounds. It was found that HDPE has a profound effect on the degree to which rPP can be reinforced by talc. However, the quantified effects of the HDPE alone were not of sufficient magnitude to account for the full difference in properties between talc-filled rPP and virgin PP.
Journal of Applied Polymer Science, 2007
We report an alternative method to modify talc for use in the fabrication of composites of polypropylene (PP) and talc. Grinding pulverization is employed to prepare talc fillers (referred to hereafter as p-talc). The properties of composites made with p-talc compare favorably with composites made with pulverized talc that has been further treated with a silane coupling agent (referred to as s-talc). The morphology of PP/p-talc composites illustrates particle orientation and a uniform dispersion of pulverized talc in the PP matrix. Modulated DSC analysis shows the ability of p-talc and s-talc to nucleate PP crystallization. The mechanical properties (i.e., the dynamic modulus, tensile strength, and impact resistance) of the PP/p-talc composites are very similar to PP/stalc composites. The modification of talc by grinding is thus a highly effective alternative method to prepare PP/talc composites that does not require chemical treatment of the talc. The pulverization method is simpler and less expensive in comparison to silane treatment.
Effects of surface modification of talc on mechanical properties of polypropylene/talc composites
2016
Low compatibility of polymer matrix and dispersed filler negatively affects the performance of polymeric composites. In order to improve the adhesion between the components in a compound the polymer matrix or/and the filler particles should be modified with a compatibilizer or/and a coupling agent. An overview of our current research on the effect of the addition of silane treated and untreated talc powders on the mechanical properties of polypropylene/talc composites is presented in this paper. Different silane coupling agents (3aminopropyltriethoxysilane, 3-glycidoxypropyltrimethoxysilane and 3-methacryloxypropyltrimethoxysilane) were used to improve the adhesion at the surface of talc powders. Maleic anhydride grafted polypropylene was utilized to increase the adhesion between the polypropylene matrix and talc powders. The content of maleic anhydride grafted polypropylene (MA-g-PP) was varied between 1 and 5 wt% in polypropylene/talc composites. The surface modification of talc powders has a significant effect on the interfacial structure and the mechanical properties such as tensile strength and impact strength of polypropylene/talc composites. The experiments show that polypropylene grafted with maleic anhydride together with silane surface treatment exhibits the highest potential for improvements in this field.
Materials Science and …, 2005
In the present paper, thermal and mechanical behavior of neat polypropylene, 40 wt.% talc-filled polypropylene and 5 wt.% silicate-clay filled polypropylene nanocomposite were tested and evaluated. TGA and DSC results show that filling the talc particle or nano clay into polypropylene can increase the decomposition temperature, but has no effect on glass transition temperature and melt temperature. Tensile results show that 40 wt.% talc particle can increase the modulus, but decrease the yield strength, 5 wt.% nano clay can improve both modulus and yield strength by 90 and 5%, respectively. Fatigue results show that the nanophased polypropylene exhibited the highest fatigue performance, and fatigue strength coefficient, σ f , of nanophased polypropylene was 13.3% higher than that of the neat propyropylene and 50% higher than that of talc-filled polypropylene. At last, a three-parameter non-linear constitutive equation was developed to describe strain rate depend strain softening behavior of three materials.