Compare thermoplastics and thermosetting plastics.

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PROPERTY	THERMOPLASTIC	THERMOSETTING PLASTIC
Bonding	Bonding by covalent bonds, Primary bonds held together by,strong cross links	Bonded by covalent bonds, Secondary bonds with weak Van,Der Waals forces which can be broken down by heat
Process	Condensation polymerisation, Compression moulding, Transfer moulding	Addition polymerisation, Extrusion, Injection Moulding, Calendering
Properties	High melting points, High tensile strength, Can withstand high temperatures without losing rigidity, Primary bonds between moleculechains	Low melting points, Low tensile strength, Can be remoulded and are,subject to disruption by heat, Secondary bonds between,molecule chains, Easy to mould

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