Thermosets - Revision history

Designing Buildings at 09:35, 10 January 2023

2023-01-10T09:35:10Z

← Older revision		Revision as of 09:35, 10 January 2023
Line 1:		Line 1:
−	Thermosets, thermosetting plastic or thermosetting resins~~, have high melting points, once exposed to that temperature they~~ cure to a solid state, their parts and properties become set. They create an infusible, insoluble network by a chemical reaction ~~where~~ the whole entire heated finished object is in effect a single large molecule. These materials cannot be melted back down they ~~would~~ just burn or char, so cannot be reshaped or restored ~~with~~ their original properties.	+	Thermosets, thermosetting plastic or thermosetting resins cure to a solid state when they reach a certain temperature (as opposed to melting like many materials), that is, their parts and properties become set. They create an infusible, insoluble network via a chemical reaction in which the whole entire heated finished object becomes in effect a single large molecule. These materials cannot be melted back down they just burn or char, so cannot be reshaped or restored to their original properties.

−	These thermosets have covalent intermolecular cross-links, and consist of major resin classes such as isocyanate, unsaturated polyester, formaldehyde, epoxies, and alkyds and because of the cross-links they are extremely strong, whilst often also being lightweight. It is the strength in the cross-links that also make these products difficult to recycle.	+	These thermosets have covalent intermolecular cross-links, and consist of major resin classes such as isocyanate, unsaturated polyester, formaldehyde, epoxies, and alkyds, and because of the cross-links they are extremely strong, whilst often also being lightweight. It is the strength in the cross-links that also make these products difficult to recycle.

−	Whilst thermoplastics have the characteristic of being able to be moulded, remoulded or recycled repeatedly, thermosets don't ~~however~~ some plastics such as PVC (Polyvinyl Chloride) and PE (Polyethylene) can ~~also~~ be processed as thermoplastics or as thermosets. Other well known thermoset materials ~~are~~	+	Whilst thermoplastics have the characteristic of being able to be moulded, remoulded or recycled repeatedly, thermosets don't - although some plastics such as PVC (Polyvinyl Chloride) and PE (Polyethylene) can be processed as thermoplastics or as thermosets.
		+
		+	Other well known thermoset materials include:

	* Polyester		* Polyester
Line 11:		Line 13:
	* Urea formaldehyde		* Urea formaldehyde

−	The main advantages of thermosets are that they are very hard and rigid, very stable and resistant to high ~~temperature~~. These types of plastics can also be reinforced for extra tensile strength with materials such as Kevlar, carbon, and ~~fiberglass~~. Of the total global production of plastic thermosets ~~only form arund~~ 11%, whilst 75% is thermosplastics that can be recycled, although ~~of that 15%~~ it is estimated that only about 5-9% of global plastic is recycled.	+	The main advantages of thermosets are that they are very hard and rigid, very stable and resistant to high temperatures. These types of plastics can also be reinforced for extra tensile strength with materials such as Kevlar, carbon, and fibreglass. Of the total global production of plastic, thermosets account for around 11%, whilst 75% are thermosplastics that can be recycled, although it is estimated that only about 5-9% of global plastic is recycled.

−	Whilst most commercial plastic, both thermoset and thermoplastic is made from fossil based resources, both types of plastic can also be made from ~~renewablere~~ sources often referred to as bio-plastics. Monomers are extracted or synthesised from biomass compounds (such as sugar) and then polymerised to make bioplastics in a similar way to standard plastics.	+	Whilst most commercial plastic, both thermoset and thermoplastic, is made from fossil-based resources, both types of plastic can also be made from renewable sources, often referred to as bio-plastics. Monomers are extracted or synthesised from biomass compounds (such as sugar) and then polymerised to make bioplastics in a similar way to standard plastics.

	= Related articles on Designing Buildings =		= Related articles on Designing Buildings =

Editor at 21:05, 3 January 2023

2023-01-03T21:05:54Z

← Older revision		Revision as of 21:05, 3 January 2023
Line 12:		Line 12:

	The main advantages of thermosets are that they are very hard and rigid, very stable and resistant to high temperature. These types of plastics can also be reinforced for extra tensile strength with materials such as Kevlar, carbon, and fiberglass. Of the total global production of plastic thermosets only form arund 11%, whilst 75% is thermosplastics that can be recycled, although of that 15% it is estimated that only about 5-9% of global plastic is recycled.		The main advantages of thermosets are that they are very hard and rigid, very stable and resistant to high temperature. These types of plastics can also be reinforced for extra tensile strength with materials such as Kevlar, carbon, and fiberglass. Of the total global production of plastic thermosets only form arund 11%, whilst 75% is thermosplastics that can be recycled, although of that 15% it is estimated that only about 5-9% of global plastic is recycled.
		+
		+	Whilst most commercial plastic, both thermoset and thermoplastic is made from fossil based resources, both types of plastic can also be made from renewablere sources often referred to as bio-plastics. Monomers are extracted or synthesised from biomass compounds (such as sugar) and then polymerised to make bioplastics in a similar way to standard plastics.

	= Related articles on Designing Buildings =		= Related articles on Designing Buildings =

Editor: Created page with "Thermosets, thermosetting plastic or thermosetting resins, have high melting points, once exposed to that temperature they cure to a solid state, their parts and properties becom..."

2023-01-03T21:01:23Z

Created page with "Thermosets, thermosetting plastic or thermosetting resins, have high melting points, once exposed to that temperature they cure to a solid state, their parts and properties becom..."

New page

Thermosets, thermosetting plastic or thermosetting resins, have high melting points, once exposed to that temperature they cure to a solid state, their parts and properties become set. They create an infusible, insoluble network by a chemical reaction where the whole entire heated finished object is in effect a single large molecule. These materials cannot be melted back down they would just burn or char, so cannot be reshaped or restored with their original properties.

These thermosets have covalent intermolecular cross-links, and consist of major resin classes such as isocyanate, unsaturated polyester, formaldehyde, epoxies, and alkyds and because of the cross-links they are extremely strong, whilst often also being lightweight. It is the strength in the cross-links that also make these products difficult to recycle.

Whilst thermoplastics have the characteristic of being able to be moulded, remoulded or recycled repeatedly, thermosets don't however some plastics such as PVC (Polyvinyl Chloride) and PE (Polyethylene) can also be processed as thermoplastics or as thermosets. Other well known thermoset materials are

* Polyester
* Silicone
* Melamine
* Epoxy
* Urea formaldehyde

The main advantages of thermosets are that they are very hard and rigid, very stable and resistant to high temperature. These types of plastics can also be reinforced for extra tensile strength with materials such as Kevlar, carbon, and fiberglass. Of the total global production of plastic thermosets only form arund 11%, whilst 75% is thermosplastics that can be recycled, although of that 15% it is estimated that only about 5-9% of global plastic is recycled.

= Related articles on Designing Buildings =

* Biogenic.
* Biobased materials.
* Glass reinforced plastic GRP.
* Glass fibre reinforced plastic.
* Polycarbonate plastic.
* Plastic cladding.
* Plastic coating market.
* Plastic in construction.
* Plastic in concrete.
* Recycled plastic bridges.
* Types of biobased materials.
* Thermoplastic.
* Wood plastic composites market for construction.

[[Category:DCN_Commentary]] [[Category:DCN_Definition]] [[Category:DCN_Product_Knowledge]] [[Category:Definitions]] [[Category:Standards_/_measurements]] [[Category:Sustainability]]