Thermoplastic vs Thermoset

Thermoplastic vs Thermoset

Thermoplastic imatanthawuza malo omwe chinthu chimatha kuyenda ndikuwonongeka chikatenthedwa, ndipo chimatha kukhalabe ndi mawonekedwe ena chikazizira. Ma polima ambiri amzere amawonetsa thermoplasticity ndipo amakonzedwa mosavuta ndi extrusion, jekeseni kapena kuwomba. Thermosetting imatanthawuza malo omwe sangafewetse ndikuwumbidwa repeatedly pamene watenthedwa, ndipo sungathe kusungunuka mu zosungunulira. Ma polima ambiri ali ndi izi.

Thermosetting ndi kusintha kwa mankhwala. Pambuyo potenthedwa, mawonekedwewo asintha ndikusintha kukhala chinthu china. Mwachitsanzo, simungathe kubwezeretsa dzira litaphikidwa. Thermoplasticity ndi kusintha kwa thupi. Kungoti momwe zinthu zimasinthira zikatenthedwa, koma mawonekedwe ake sasintha. Akadali mbadwa. Mwachitsanzo, kandulo ikasungunuka ndi kutentha, ikhoza kubwezeretsedwanso ku kandulo yoyambirira, koma kuyaka kwa kandulo ndiko kusintha kwa mankhwala.

1. Thermoplastics

Imakhala yofewa komanso yamadzimadzi ikatenthedwa, ndipo imauma ikazizira. Njirayi ndi yosinthika ndipo ikhoza kukhala repeated. Polyethylene, polypropylene, polyvinyl kolorayidi, polystyrene, polyoxymethylene, polycarbonate, polyamide, acrylic pulasitiki, polyolefins ena ndi copolymers awo, polysulfide, polyphenylene ether, chlorinated polyether, etc. Ndi thermoplastic. Unyolo wa ma molekyulu a resin mu thermoplastics onse ndi mzere kapena nthambi. Palibe mgwirizano wamankhwala pakati pa maunyolo a maselo, ndipo amafewetsa ndikuyenda akatenthedwa. Njira yozizirira ndi kuumitsa ndikusintha kwathupi.

2. Mapulasitiki a thermosetting

Akatenthedwa kwa nthawi yoyamba, amatha kufewa ndi kuyenda. Ikatenthedwa ndi kutentha kwina, makemikolo amafika podutsana ndi kulimba kuti aumbe. Kusinthaku sikungasinthe. Pambuyo pake, ikatenthedwanso, sichingakhalenso chofewa ndi kuyenda. Ndi chifukwa cha chikhalidwe ichi kuti kuumba kumachitika, ndipo kutuluka kwa pulasitiki pa kutentha koyamba kumagwiritsidwa ntchito kudzaza patsekeke pansi pa kupanikizika, ndiyeno kulimba kukhala chinthu cha mawonekedwe ndi kukula kwake. Izi zimatchedwa thermoset.

Utoto wa mapulasitiki a thermosetting ndi wozungulira kapena wanthambi musanachiritsidwe. Pambuyo kuchiritsa, zomangira mankhwala amapangidwa pakati unyolo maselo kupanga atatu azithunzithunzi maukonde dongosolo. Sikuti sungasungunukenso, komanso sungathe kusungunuka mu zosungunulira. Phenolic, aldehyde, melamine formaldehyde, epoxy, unsaturated polyester, silikoni ndi mapulasitiki ena onse ndi pulasitiki thermosetting.

Thermoplastic vs Thermoset