Chiyambi
Pulasitiki ndi zinthu zomwe zimagwiritsidwa ntchito m'magawo angapo chifukwa cha kusinthasintha kwawo komanso chitetezo. Kuonjezera apo, kupanga kwake ndikotsika mtengo kusiyana ndi zipangizo zamakono. Pulasitiki amagawidwa m'magulu awiri akuluakulu: thermoplastics ndi thermoset plastics. M’nkhaniyi tikambirana kusiyana kwa zinthu ziwirizi.
Thermoplastics
Thermoplastics ndi zinthu zapulasitiki zomwe zimatha kusungunuka mobwerezabwereza ndi kutentha kowonjezereka ndikulimba ndi kutentha kochepa. Mapulasitikiwa ndi osinthika kwambiri ndipo amatha kuumbidwa mumtundu uliwonse womwe mukufuna. Thermoplastics ndi recyclable kudzera kusungunuka ndi akamaumba. Mapulasitikiwa ndi osavuta kupanga ndipo mtengo wake wopangira ndi wotsika kwambiri.
Zitsanzo za Thermoplastics
- Polyethylene (PE)
- Polycarbonate (PC)
- Polyester (PET)
- Polypropylene (PP)
Thermostable Pulasitiki
Mapulasitiki a thermoset, mosiyana ndi thermoplastics, sangathe kusungunuka mobwerezabwereza ndikuwumbidwa ndi kugwiritsa ntchito kutentha. Akaumbidwa, amakhala olimba mpaka kalekale. Mapulasitikiwa amakhala ndi kutentha kwambiri ndipo amakhala olimba kuposa thermoplastics. Komabe, mapulasitiki a thermoset sangabwezeretsedwenso ngati thermoplastics.
Zitsanzo za Thermoset Plastics
- Bakelite
- Epoxy
- Galasi la Fiberglass
- Urea-formaldehyde utomoni
Mapeto
Magulu onse apulasitiki ali ndi mawonekedwe awoawo ndi ntchito zawo. Thermoplastics ndi yabwino kupanga zinthu zambiri zapulasitiki zomwe zimakhala zosavuta kupanga ndipo sizimatentha kwambiri. Mapulasitiki a thermoset ndi ofunikira popanga zinthu zomwe zimayenera kukhala zolimba komanso zolimba. Mulimonsemo, kusankha kwa mtundu wa pulasitiki kumadalira ntchito ndi zofunikira zopangira.
Ndine Sebastián Vidal, mainjiniya apakompyuta omwe amakonda ukadaulo komanso DIY. Komanso, ine ndine mlengi wa tecnobits.com, komwe ndimagawana nawo maphunziro kuti ukadaulo ukhale wofikirika komanso womveka kwa aliyense.