Kodi thermoplastics ndi chiyani?

Thermoplastics ndi gulu la mapulasitiki omwe ali pulasitiki pa kutentha kwina, kulimba pambuyo pozizira, ndipo amathaepepa ndondomeko iyi. Mapangidwe a mamolekyulu amakhala ndi liniya wa polima pawiri, omwe nthawi zambiri alibe magulu omwe akugwira ntchito, ndipo samakumana ndi ma intermolecular crosslinking akatenthedwa. Zinyalala zitha kukonzedwanso kukhala zatsopano pambuyo pozikonzanso. Mitundu yayikulu ndi ma polyolefins (vinyls, olefins, styrenes, acrylates, olefins okhala ndi fluorine, etc.), mapadi, polyether polyesters ndi Aromatic heterocyclic polima, etc.

Tanthauzo

Thermoplastics ndi mapulasitiki omwe amagwiritsidwa ntchito kwambiri. Amapangidwa ndi utomoni wa thermoplastic monga chigawo chachikulu ndi zowonjezera zosiyanasiyana. Pazikhalidwe zina za kutentha, mapulasitiki amatha kufewetsa kapena kusungunuka mu mawonekedwe aliwonse, ndipo mawonekedwewo amakhalabe osasintha pambuyo pozizira; boma ili likhoza kukhala repeamadya nthawi zambiri ndipo amakhala ndi pulasitiki nthawi zonse, ndipo izi repekusintha kwa thupi kumatchedwa thermoplastic. pulasitiki.

Kuphatikiza polyethylene, polypropylene, polyvinyl chloride, polystyrene, polyoxymethylene, polycarbonate, polyamide, acrylic pulasitiki, polyolefins ena ndi copolymers awo, polysulfone, polyphenylene etha

Gulu Lamapangidwe

Ma thermoplastics amatha kugawidwa m'mapulasitiki ogwiritsidwa ntchito wamba, mapulasitiki opangira uinjiniya, ndi mapulasitiki apadera malinga ndi momwe amagwirira ntchito, ntchito zosiyanasiyana, komanso kusinthasintha kwaukadaulo wakuumba.

Makhalidwe akuluakulu a mapulasitiki azinthu zambiri ndi awa: kugwiritsa ntchito kwakukulu, kukonza kosavuta, ndi ntchito yabwino yokwanira. Monga polyethylene (PE)polyvinyl kolorayidi (PVC), polypropylene (PP), polystyrene (PS), acrylonitrile-butadiene-styrene (ABS) amadziwikanso kuti "mapulasitiki asanu a cholinga chachikulu".

Makhalidwe a mapulasitiki a uinjiniya ndi mapulasitiki apadera ndi awa: zomanga zina ndi katundu wa ma polima apamwamba ndizopambana kwambiri, kapena ukadaulo wopangira ukadaulo ndizovuta, ndi zina zambiri, ndipo nthawi zambiri amagwiritsidwa ntchito muukadaulo waukadaulo kapena magawo apadera ndi zochitika. Mapulasitiki akuluakulu aumisiri ndi: nayiloni (nayiloni), polycarbonate (PC), polyurethane (PU), polytetrafluoroethylene (Teflon, PTFE), polyethylene terephthalate (PET), etc., Mapulastiki apadera monga "ma valve opangidwa ndi mtima" ndi "zolumikizana zopangira" monga "ma polima azachipatala".