Chii chinonzi thermoplastics?
Thermoplastics ikirasi yemapurasitiki ari epurasitiki pane imwe tembiricha, anoomesa mushure mekutonhora, uye anogona r.epepanguva iyi. Iyo molecular chimiro inoratidzwa nemutsara wepolymer komboni, iyo kazhinji isina mapoka anoshanda, uye isingaite mutsara intermolecular crosslinking kana yapiswa. Zvigadzirwa zvinoraswa zvinogona kudzokororwa kuita zvigadzirwa zvitsva mushure mekugadzirisa zvakare. Marudzi makuru ma polyolefins (vinyls, olefins, styrenes, acrylates, fluorine-ine olefins, nezvimwewo), cellulose, polyether polyesters uye Aromatic heterocyclic polymers, nezvimwe.
tsananguro
Thermoplastics ndiyo mapurasitiki anoshandiswa zvakanyanya. Iwo akagadzirwa ne thermoplastic resin sechinhu chikuru uye zvakasiyana-siyana zvinowedzera. Pasi pemamwe mamiriro ekupisa, mapurasitiki anogona kupfava kana kunyungudika mune chero chimiro, uye chimiro chinoramba chisina kuchinjika mushure mekutonhora; mamiriro aya anogona kuva repeyakatorwa kakawanda uye inogara iine plastiki, uye iyi repeKuchinja kunongova shanduko yemuviri, iyo inonzi thermoplastic. plastiki.
Kusanganisira polyethylene, polypropylene, polyvinyl chloride, polystyrene, polyoxymethylene, polycarbonate, polyamide, acrylic mapurasitiki, mamwe polyolefins uye copolymers awo, polysulfone, polyphenylene ether
Structural Classification
Thermoplastics inogona kukamurwa kuita zvakajairika-chinangwa mapurasitiki, einjiniya mapurasitiki, uye akakosha epurasitiki zvinoenderana nemaitiro avo ekuita, kuwanda kwekushandisa, uye kuita kwakasiyana-siyana kwehunyanzvi hwekuumba.
Hunhu hukuru hwemapurasitiki-chinangwa ndeaya: kushandiswa kwakakura, kugadzirisa kuri nyore, uye kuita kwakanaka kwakazara. Zvakadai se polyethylene (PE)polyvinyl chloride (PVC), polypropylene (PP), polystyrene (PS), acrylonitrile-butadiene-styrene (ABS) inozivikanwawo se "mapurasitiki mashanu-chinangwa".
Hunhu hweinjiniya mapurasitiki uye mapurasitiki akakosha ndeaya: zvimwe zvimiro uye zvimiro zveakakwira mapolymers akanyanya kunaka, kana kuumba tekinoroji yakaoma, nezvimwewo, uye inowanzoshandiswa muinjiniya yehunyanzvi kana minda yakakosha uye zviitiko. Iwo makuru einjiniya mapurasitiki ndeaya: naironi (Nylon), polycarbonate (PC), polyurethane (PU), polytetrafluoroethylene (Teflon, PTFE), polyethylene terephthalate (PET), nezvimwewo, Mapurasitiki anokosha akadai se "synthetic heart valves" uye "artificial joints" se "medical polymers".