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The Time Project
Lesson 4: Plastics (Thermosetting plastics)
 
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Thermoplastics

Thermosetting plastics
Plastic Memory
Table of plastics
Programmes of study


Thermosetting plastics

Thermosetting Plastics are made up of lines of molecules which are heavily cross-linked.

It creates a rigid molecular structure. They may be heated the first time and shaped but they become permanently stiff and solid. They cannot be reshaped again.


Cross-linked molecules

The molecules of thermosetting plastics are heavily cross-linked. They form a rigid molecular structure.

Whereas in thermoplastics the molecules sit end to end, the molecules in thermoplastics sit end-to-end and side-by-side.

Although they soften when heated the first time, which allows them to be shaped they become permanently stiff and solid and cannot be reshaped.

Thermoplastics remain rigid and non-flexible even at high temperatures. Polyester resin and urea formaldehyde are examples of thermosetting plastics.



Useful links

Introduction
Situation & Brief

Orthographic Drawing

Brain Storming
Plastics Theory
Woods Theory
Metals Theory
Drawing Styles
Tools used
Flowcharts
Vacuum Forming
Quality Control
Finishes

Teacher's Rationale
Programmes of Study

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