Preparation and Study of Mechanical Properties of Nylon 66 / CaCO3 Engineering Thermoplastic Composite
Preparation and Study of Mechanical Properties of Nylon 66 / CaCO3Engineering Thermoplastic Composite.
Abstract:- The thermoplastic materials, which has the capacity to withstand tensile pressure of more than 400 Kg/cm2 and temperature of more than 1000C considered as engineering thermoplastics. In this paper, a new composite of Nylon 66 has been prepared by adding micron-sized calcium carbonate (CaCO3 ) filler aiming in improvement of the mechanical properties of Nylon 66. Directly a standard specimen is prepared by injection moulding process, it is a cyclic process of forming plastic into a desired shape by forcing the material under pressure into a cavity.
Key words: Nylon 66, composite, Caco3 , thermoplastic, filler.
INTRODUCTION
Nowadays, polymers and polymer based composites are used commonly in situations where a good tribological property is required. Homopolymers alone cannot satisfy the required properties for the tribological applications such as cams, brakes, bearings, gears etc.Thus, to improve properties and to lower the cost of polymer products, fillers are employed. The fillers can be in micro and nano sizes of inorganic fillers, organic fillers and metallic particulate materials.The tribological behaviour of polymers with the addition of fillers is of great interests in recent years to improve the friction coefficient and wear rate. (Difallah et al., 2012), Nylon 66 is a well-known engineering thermoplastic polymer over the past decades. The mechanical properties of Nylon 66 have been in studies over the years. Hence, polymers containing inorganic fillers have been studied widely because of its growing industrial applications. Inorganic particulate fillers such as calcium carbonate, talc, mica, kaolin etc. of micrometre-sized particles are used to improve tensile strength, hardness,impact strength, toughness but in reductionof elongation(Wang et al., 2008). Calcium carbonate is one of the most important fillers used in polymer composites. It has emerged as a promising reinforcer due to its easy mix and processing and also it may improve the mechanical, tribological and rheological properties of polymer composites.