2006-11-29 05:43:21 · 2 answers · asked by PAUL F 1 in Science & Mathematics ➔ Chemistry
Their behaviour when you heat them:
Thermoplastics soften, and re-set on cooling.
Thermosetting plastics don't soften at all, and merely catch fire if you overdo the heating!
2006-11-29 05:46:56 · answer #1 · answered by Gervald F 7 · 0⤊ 0⤋
Thermo-forming: Forming of thermoplastic sheet by using heating it and then pulling it down onto a mildew floor to shape it. Thermoforming differs from injection molding, blow molding, rotational molding, and different varieties of processing plastics. skinny-gauge thermoforming is basically the manufacture of disposable cups, bins, lids, trays, blisters, clamshells, and different products for the nutrition, scientific, and well-known retail industries. Thick-gauge thermoforming contains factors as different as motor vehicle door and sprint panels, refrigerator liners, application motor vehicle beds, and plastic pallets. Thermo-placing: completely hardening or solidifying on being heated. Used of particular guy made resins. Thermosetting plastics (thermosets) communicate over with particularly a quantity polymer components that treatment, in the time of the addition of potential, to a extra suitable variety. The potential could be interior the variety of heat (many times above 2 hundred tiers Celsius), via a chemical reaction (2 section epoxy, as an occasion), or irradiation. Thermoset components are many times liquid or malleable only before curing, and designed to be molded into their very final variety, or used as adhesive. Thermoset polymer resins may well be switched over into plastics or rubbers by using circulate-linking. potential and catalysts are extra that reason the molecular chains to link right into a inflexible, 3-D shape. A thermoset fabric can't be melted and re-molded after that's cured. Thermoset components are many times extra suitable than thermoplastic components. they are additionally extra effective appropriate to extreme temperature purposes. they do no longer look to be certainly recyclable like thermoplastics, which may well be melted and re-molded.
2016-10-13 08:58:37 · answer #2 · answered by Anonymous · 0⤊ 0⤋