Polycarbonate (PC) yog cov polyester ntawm cov kab mob carbonic acid, carbonic acid nws tus kheej tsis ruaj khov, tab sis nws cov khoom qub (xws li phosgene, urea, carbonate, carbonate) muaj qee qhov kev nyab xeeb.
Raws li cov qauv dej cawv sib txawv, polycarbonate tuaj yeem muab faib ua aliphatic thiab aromatic.
Aliphatic polycarbonate. Xws li polyethylene carbonate, polytrimethylene carbonate thiab lawv cov copolymer, uas muaj cov nplauv tsis tshua pom kev thiab iav hloov qhov kub, qhov muaj zog tsis zoo, thiab tsis tuaj yeem siv los ua cov qauv txheej txheem; tab sis nrog lawv cov biocompatibility thiab biodegradability cov yam ntxwv, lawv tuaj yeem siv los ua cov ntaub ntawv kev teeb tsa. Nws tau siv hauv tshuaj qeeb-tso cov tsheb thauj mus los, phais mob pob txha, pob txha txhawb nqa khoom, thiab lwm yam.
Polycarbonate tiv taus cov acids tsis muaj zog, cov hauv paus tsis muaj zog, thiab cov roj hauv nruab nrab.
Polycarbonate tsis tiv taus ultraviolet teeb thiab muaj zog alkalis.
PC yog linear carbonic acid polyester. Cov pab pawg carbonic acid nyob rau hauv cov molecule tau hloov kho nrog lwm pab pawg. Cov pab pawg no tuaj yeem yog cov tshuaj tsw qab, aliphatic, lossis ob qho tib si. Bisphenol A PC yog qhov khoom lag luam tseem ceeb tshaj plaws.
PC yog qhov yuav luag tsis muaj xim uas tsis muaj xim amorphous polymer nrog cov khoom zoo. PC siab molecular phaus hnyav muaj qhov sib zog tawv, Izod notched cuam tshuam lub zog yog 600 ~ 900J / m, thiab cov cua sov ua kom sov tsis sib xws ntawm cov qib tsis tiav yog txog 130 ° C. Tom qab iav iav yog muaj zog dua, qhov nqi no yuav nce ntxiv los ntawm 10 ° C. Lub flexural modulus ntawm PC tuaj yeem ncav ntau dua 2400MPa, thiab cov khoom xaum yuav tuaj yeem ua tiav rau cov khoom loj loj. Hauv qab no 100 ° C, tus lej nkag hauv qab load tsawg heev. PC muaj hydrolysis tsis zoo thiab tsis tuaj yeem siv rau cov khoom lag luam uas tau hais txog kev kub nyhiab siab.
Lub ntsiab kev ua tsis tiav ntawm PC yog tias nws tsis muaj peev xwm tiv taus hydrolysis, muaj kev nkag siab zoo rau kev ceeb toom, tiv taus cov tshuaj organic, thiab muaj cov xeb tsis zoo. Nws yuav tig daj thaum raug rau lub teeb ci ultraviolet rau lub sijhawm ntev. Zoo li lwm cov resins, PC tau yooj yim corroded los ntawm qee cov kuab tshuaj organic.
Cov khoom siv hauv PC yog nplaim hluav taws thiab hnav-resistant. Antioxidant.
Lub cev
Qhov ceev: 1.18-1.22 g / cm ^ 3 Tawm kev nthuav dav: 3.8 × 10 ^ -5 cm / ° C Kev ntsuas hluav taws xob kub: 135 ° C Tsawg kub -45 ° C
Polycarbonate tsis muaj xim thiab pob tshab, kub-resistant, cuam tshuam-resistant, nplaim taws-retardant BI qib, thiab muaj cov khoom zoo txhua yam ntawm qhov kub tsis zoo. Piv nrog rau kev ua tau zoo nyob ze rau polymethyl methacrylate, polycarbonate muaj cov txiaj ntsig zoo tiv thaiv, qhov ntsuas siab siab, thiab kev ua haujlwm zoo. Nws muaj UL94 V-0 nplaim taws rov zoo tsis muaj cov tshuaj ntxiv. Txawm li cas los xij, tus nqi ntawm polymethyl methacrylate yog tus nqi qis dua li ntawm polycarbonate, thiab cov cuab yeej siv loj tuaj yeem tsim tau los ntawm kev ua rau ntau polymerization.
Polycarbonate muaj cov hnav tsis zoo. Qee cov khoom siv polycarbonate siv rau cov khoom siv coj los yuav tsum tau kho tshwj xeeb saum npoo av.
Kev faib tawm
Anti-static PC, ua PC, hluav taws kub PC nrog fiber ntau, tiv thaiv ultraviolet thiab huab cua-tiv thaiv PC, zaub mov-qib PC, thiab tshuaj tiv thaiv PC.
