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  • Once 'set' these plastics cannot be reheated to soften, shape and mould.

  • 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.

  • Unlike thermoplastics, they retain their strength and shape even when heated.
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14y ago
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13y ago

Thermoplastic structures only have weak forces/bonds between molecules.

Thermosetting molecules however have strong inter-linked cross links and strong bonds between their molecules.

This would effect their melting point etc.

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9y ago

The properties of thermoplastic material are widely varied. However, they have many uses including insulators, either thermal or electrical and are generally quite light in weight.

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11y ago

linear chain polymer

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Q: How does the structure of a thermoplastic differ from a thermosetting plastic?
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How does thermoplastic material differ from a thermosetting material?

Thermoplastic and thermoset materials both fall under the broad category of Polymers. The biggest difference between a thermoplastic and thermoset is that a thermoplastic can be recycled. Whereas a thermoset irreversibly cure. Thermoplastic: PE, PP, PVC. Thermoset: Bakelite, Epoxy.


Where does plastic come from?

Thermoplastic, also known as a thermosoftening plastic,[1][2] is a polymer that turns to a liquid when heated and freezes to a rigid state when cooled sufficiently. Most thermoplastics are high-molecular-weight polymers whose chains associate through weak Van der Waals forces (polyethylene); stronger dipole-dipole interactions and hydrogen bonding (nylon);[3] or even stacking of aromatic rings (polystyrene). Thermoplastic polymers differ from thermosetting polymers (e.g. phenolics, epoxies) in that they can be remelted and remoulded. Many thermoplastic materials are addition polymers; e.g., vinyl chain-growth polymers such as polyethylene and polypropylene; others are productions of condensation or other forms of polyaddition polymerisation, such as the polyamides or polyester.


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