The Tensile Behaviour of Common Engineering Polymers
The Tensile Behaviour of Common Engineering Polymers
Abstract
The mechanical properties of polymers vary significantly from polymer to polymer as a result of atomic structures and bond strength. The tensile properties of representative samples from the common polymer were tested and evaluated in this experiment. This laboratory experiment is also designed to demonstrate the procedure used for obtaining mechanical properties as modulus of elasticity, yield strength, ultimate tensile strength (UTS), uniform elongation, elongation and reduction in area at rupture. This report is based on the fact of understanding how tensile properties are controlled by the nature of the polymers chain and how tensile properties of polymers vary with testing speed.
Introduction
The tensile strength of a material quantifies how much stress the material will endure before failing. This is very important in applications that rely upon a polymer 's physical strength or durability. For example, a rubber band with a higher tensile strength will hold a greater weight before snapping. The tensile test consists on the application of a tensile stress on a chosen specimen attached to a device that calculates the force applied on it and the elongation. Polymers or plastic as they are commonly known, consist of long molecular chains of carbon compounds. This type of long chain structure of the plastics or polymers give it special properties that may not be exist in metals. It’s very easy to change the shape of polymers because they are light and corrosion resistant. Additionally in the pure state all polymers are colourless and easy to produce any coloured products by the addition of dyes and pigments. Polymer`s physical, mechanical and electrical properties depends on its structure, temperature and bonds between the monomers.
In general, tensile strength increases with polymer chain length and cross linking of polymer chains. For example, as chain length is increased, melting and
Abstract
The mechanical properties of polymers vary significantly from polymer to polymer as a result of atomic structures and bond strength. The tensile properties of representative samples from the common polymer were tested and evaluated in this experiment. This laboratory experiment is also designed to demonstrate the procedure used for obtaining mechanical properties as modulus of elasticity, yield strength, ultimate tensile strength (UTS), uniform elongation, elongation and reduction in area at rupture. This report is based on the fact of understanding how tensile properties are controlled by the nature of the polymers chain and how tensile properties of polymers vary with testing speed.
Introduction
The tensile strength of a material quantifies how much stress the material will endure before failing. This is very important in applications that rely upon a polymer 's physical strength or durability. For example, a rubber band with a higher tensile strength will hold a greater weight before snapping. The tensile test consists on the application of a tensile stress on a chosen specimen attached to a device that calculates the force applied on it and the elongation. Polymers or plastic as they are commonly known, consist of long molecular chains of carbon compounds. This type of long chain structure of the plastics or polymers give it special properties that may not be exist in metals. It’s very easy to change the shape of polymers because they are light and corrosion resistant. Additionally in the pure state all polymers are colourless and easy to produce any coloured products by the addition of dyes and pigments. Polymer`s physical, mechanical and electrical properties depends on its structure, temperature and bonds between the monomers.
In general, tensile strength increases with polymer chain length and cross linking of polymer chains. For example, as chain length is increased, melting and
References: 1) Ian P.Jones (2001) Materials Science for Electrical and Electronics engineers (Oxford) .