Classification-plastics-reinforced plastics and adhesives, Mechanical Engineering

Classification

Two categories of plastics are identified. Those are: thermosetting plastics and thermoplastics. Plastics generally cannot stand higher temperatures. They become lose and soft their shapes on higher temperatures. Thermoplastics become raising soft or their capability to deform plastically raises as the temperature rises. They can be specified any shape by moulding any number of times. Conversely thermosetting plastics do not soften at higher temperature but may eventually burn or disintegrate and lose their shape. Hence thermosetting plastics can be moulded merely once. Both the plastics can be cut or machined.

Structure of both plastics being polymeric; have of long chain molecules that are tangled as illustrated in following figure. Thermoplastics either carry extremely week cross linking bonds or no cross linkages among chains. Alternatively thermosetting plastics carry strong cross linking bonds and several unfinished polymeric reaction. At higher temperatures such unfinished polymeric reactions are finished and cross linking assists in distortion quite than melting.

                                         410_Classification-Plastics-reinforced plastics and adhesives.png

                                                                    Figure: Two Types of Plastics

Posted Date: 2/27/2013 4:20:18 AM | Location : United States







Related Discussions:- Classification-plastics-reinforced plastics and adhesives, Assignment Help, Ask Question on Classification-plastics-reinforced plastics and adhesives, Get Answer, Expert's Help, Classification-plastics-reinforced plastics and adhesives Discussions

Write discussion on Classification-plastics-reinforced plastics and adhesives
Your posts are moderated
Related Questions
state a note on reversible and irreversible process?

Part Contact States The loading, movement and unloading of parts via the manufacturing system should be scheduled through supervisory computer. In contrast along with classical

GENERAL FACTORS BEHIND ACCIDENT:  Following are the factors, which may cause accidents in workshop, so we should take care of these factors: Insufficient light and ventilati

to find a horizontal force acting on a body which is inclined to the plane with a particular angle

Consider a car of mass m1 is towing a trailer of mass m2 through a tow bar of stiffness k. Drag forces proportional to the car velocity (b1 v1) and the trailer velocity (b2 v2) a

What is Tube Drawing - cold drawing processes This kind of drawing is very similar to bar drawing process and in majority of cases it is accomplished by the use of a draw be

State of CAD Data Exchange: "Are we closely there yet?" the dreaded question we hear wailing from the back of the car. "Yes, nearly there" is our cheerful response. We didn't

BOILER CLASSIFICATION : (1 )  According to Tube Contents:   Boilers can be water tube or fire tube type. In water tube boilers water flows in tubes and in Fire Tube Boilers h

application of optiz

Dissect an email you have received. First, get the original, ASCII text of the email, including the headers, and the blank line separating the headers and the body of the email.