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Chemical katundu wa mankhwala
Polycarbonate (PC) ndi gulu la polyester la carbonic acid, carbonic acid palokha siikhazikika, koma zotumphukira zake (monga phosgene, urea, carbonate, carbonate) zimakhala ndi kukhazikika kwina.
Malingana ndi momwe mowa umapangidwira, polycarbonate ikhoza kugawidwa m'magulu awiri a aliphatic ndi onunkhira.
Aliphatic polycarbonate. Monga polyethylene-carbonate, polytrimethylene carbonate ndi copolymers ake, otsika osungunuka mfundo ndi galasi kusintha kutentha, osauka mphamvu, sangagwiritsidwe ntchito monga zipangizo structural; koma kugwiritsa ntchito biocompatibility ndi biodegradable katundu, angagwiritsidwe ntchito mankhwala pang'onopang'ono kumasula zonyamulira, sutures opaleshoni, fupa thandizo zipangizo ndi ntchito zina.
Polycarbonate imagonjetsedwa ndi ma asidi ofooka, maziko ofooka, ndi mafuta osalowerera.
Polycarbonate sagonjetsedwa ndi kuwala kwa ultraviolet ndi alkalis amphamvu.
PC ndi liniya carbonate polyester ndi alternating carbonic acid magulu mu molekyulu ndi magulu ena amene angakhale onunkhira, aliphatic, kapena onse. Bisphenol A mtundu wa PC ndiye chinthu chofunikira kwambiri m'mafakitale.
PC ndi pafupifupi wopanda mtundu galasi amorphous polima ndi zabwino kuwala katundu. Utoto wa PC wolemera wa mamolekyulu uli ndi kulimba kwambiri, mtengo wa cantilever notched mphamvu ya 600 ~ 900J/m, kutentha kwapang'onopang'ono kosakwanira pafupifupi 130 ° C, utomoni wagalasi wolimbikitsidwa ungapangitse kuti mtengowu uwonjezeke ndi 10 ° C. PC kupinda modulus akhoza kufika oposa 2400MPa, utomoni akhoza kukonzedwa mu mankhwala lalikulu okhwima. Kutsika kwapang'onopang'ono kumatsika kwambiri pansi pa 100 ° C. PC ndi bwino kugonjetsedwa ndi hydrolysis ndipo sangathe kugwiritsidwa ntchito kwa mankhwala amene mobwerezabwereza pansi ndi mkulu kuthamanga nthunzi.
Zofooka zazikulu za PC ndi kusowa kwa kukhazikika kwa hydrolytic, kukhudzika kwa chipwirikiti, kukana mankhwala achilengedwe, kukana kukanda bwino, komanso chikasu chifukwa chowonekera kwa nthawi yayitali ndi kuwala kwa UV. Monga ma resin ena, PC imatha kukokoloka ndi zosungunulira zina za organic.
Zida za PC ndizobweza moto. Kugonjetsedwa ndi oxidation.
