Advantage And Disadvantage Of Polymers

Dynamic mechanical analysis showed that increasing fiber content provides an improvement in the rigidity of the composites. Cardanol modified resol reinforced nanoclay composite was prepared and mechanical properties of the final composites were improved by doping a 6 wt% of nanoclay in cardanol modified resol (CMR) into the epoxy matrix. The results show that a 15 wt% of CMR in epoxy is a most suitable ratio (Nguyen et al 2007).

For bio-composite, is a composite material formed by a “matrix” and “reinforcement” of natural fibers. These materials are often mimic the structure of the living materials involved in the process keeping the strengthening properties of

Composite materials have been evaluated with a matrix properties unsaturated polyester resin by conducting mechanical testing, including the pressure, compression, hardness and impact resistance.. While wood flour helped add to the balance between the original compression strength reductions up to 3 wt. wood flour and then reduce the strength. The results confirmed that the best promote and 3% by weight of wood flour consider the compression strength

A polymer is a long chain of molecules made up of many repeating identical units called monomers. A polymer made from two or more repeating units of monomers are called copolymers (Smith et al., 2006). Monomers are often made up of Hydrogen and Carbon with extra elements such as Oxygen, Nitrogen and Chlorine, creating the backbone of the polymer. These can be made synthetically, such as polyethylene or occur naturally like cellulose, as are the polymers being investigated are. Polylactic acid is made naturally and Polypropylene is made synthetically. Polymers can be three dimensional networks which don’t melt such as epoxy resin, and are called thermoset polymers, two dimensional or one dimensional networks or chains which can be melted such as polypropylene called thermoplastic polymers

Composite structures have been around since the beginning of time, but the modern day uses were first applied during World War II. Composites such as rubber tires and glass were used in structures where metal or other material structures could not be applied. The past few years, composite material structures have been used more in aircraft structures than any other time in the history of man. The main reason is that the understanding and technology are at a point were composite structures could be applied in greater use due to human understanding. Composite structures in aircraft are becoming more practical for more applications. This is based on the how/why composites are being applied, the benefits of composites, the problems/ failures of

A composite is a structural material that consists of two or more combined constituents that are combined at a macroscopic level and are not soluble in each other. One constituent is called the

The Photopolymerization of a mixture of multi-functional monomers or oligomers that polymerize by different mechanisms leads to the build-up of two interpenetrating polymer networks (IPN). An obvious requirement is that the two monomers must be fully compatible, and their polymers as well, in order to avoid segregation and the formation of heterophasic materials. The major advantages of these UV-curable hybrid systems lie in their superior combination of properties which can be tailor-made for a given application by adjusting the proportions of the two components. The IPN formed will exhibit the main features of the two polymer networks, for instance the toughness and scratch resistance of UV-cured acrylate polymers and the elastomeric character of the cross-linked polyurethane-vinyl ether, with

Carbon Fibre – Carbon fiber composite is an increasingly popular non-metallic material commonly used for bicycle

Composite materials are the engineering materials made from two or more constituent materials they remain separate and distinct on a macroscopic level but forming a single component or Composites can defined as materials that consist of two more chemically and physically different phases separated by a distinct interface(matrix phase and dispersed phase). The different systems are combined judiciously to achieve a component with more and more useful structural or functional properties non-attainable by any of the constituent alone. In the composites usually Matrix phase is the primary or base phase having a continuous character or continuous molecular chain. But these Matrixes are usually less hard and more ductile phase. In composites it holds the dispersed (reinforcing) phase, shares a load with it. The Dispersed phase is encapsulated in the matrix in a discontinuous form called a secondary phase. This Secondary phase

A "composite" is when two or more different materials are combined together to create a material which is superior and unique and holding different properties than earlier. Light weight high strength materials are essential in fabrication of aerospace structures like airframes, rocket motor casings, nozzles and wings. The composites are the materials formed by embedding fibers in the plastic that add characteristics like high resistance to fatigue, anticorrosive, high tensile strength or stiffness with weight savings up to 25-45% compare with conventional metallic designs. Composites possess greater reliability, which are capable to meet the design requirements, easier to achieve smooth aerodynamic profiles against drag reduction and high resistance to impact damage.

Polymers are all around us, a fact that we cannot deny. Polymers are used by everyone of all ages. Man has used natural polymers throughout history, but it is only in the last 60 years that we have been able to make our own synthetic polymers. Polymers have been used vastly in many industrial applications until now. However, like any other organic compounds, polymer burn readily in presence of oxygen, and generally thermoplastics are worse than thermoset materials. The flammability of polymers can limit their applications. Fire safety concerns regarding flammability of polymers has put specific and strict requirements for certain types of application, for example in enclosed and inescapable areas, namely airplane cabin. Though lightweight and high performance polymeric materials are

Composites are materials consisting of two or more chemically distinct constituents having a clear interface separating them and with properties which cannot be obtained by any constituent material working individually [1].

Today's demand for new and properties improved materials are in high. In order to fulfill all those needs people has to go for the Composites. Metal Matrix Composites is the latest trending technology when it comes to the composite materials that posses various improvised properties that suits many property needs. It is also

Composite materials are defined as the combination of more than two materials, one of the material is called reinforcement material and another one of the material is called matrix, the reinforcement materials in the form of fiber particle, ex; - glass fiber for natural fiber, coconut shell powder matrix material and in the form of resin ex: - phenyl formaldehyde or epoxy, urea formaldehyde and so on.

Composites are able to meet up diverse design requirements with considerable weight savings as well as elevated strength-to-weight ratio as compared to conventional materials. There are various types of composites such as Metal Matrix Composites (MMC), Particulate Composite (PC) and Fiber Reinforced Polymer composites (FRP). Among these composites, Carbon Fiber Reinforced Composites are widely