A cikin wannan fitowar, muna ci gaba da fahimtarmu game da robobi ta fuskar sinadarai.
Abubuwan da ke cikin robobi: Abubuwan da ke tattare da robobi sun dogara ne da nau'in sinadarai na sassan sassan, yadda aka tsara waɗannan sassan, da yadda ake sarrafa su.Duk robobi ne polymers, amma ba duk polymers ne robobi ba.Polymers na filastik sun ƙunshi sarƙoƙi na haɗin haɗin gwiwa da ake kira monomers.Idan an haɗa monomers iri ɗaya, ana samar da homopolymer.An haɗa monomers daban-daban don samar da copolymers.Homopolymers da copolymers na iya zama layika ko reshe.Sauran kaddarorin robobi sun haɗa da: Filastik gabaɗaya suna da ƙarfi.Zasu iya zama daskararrun daskararru, daskararrun kristal ko daskararru na Semi-crystalline (microcrystals).Filastik gabaɗaya matalauta ne masu zafi da wutar lantarki.Yawancin insulators ne tare da babban ƙarfin dielectric.Gilashin polymers suna da ƙarfi (misali, polystyrene).Koyaya, ana iya amfani da flakes na waɗannan polymers azaman fina-finai (misali polyethylene).Kusan dukkanin robobi suna nuna elongation lokacin damuwa kuma ba sa murmurewa lokacin da aka sami sauƙin damuwa.Ana kiran wannan "creep".Filastik suna dawwama kuma suna raguwa sosai a hankali.
Wasu bayanai game da robobi: Filastik na farko na roba shine BAKELITE, wanda LEO BAEKELAND ya kera a 1907. Ya kuma kirkiro kalmar “roba”.Kalmar “roba” ta fito ne daga kalmar Helenanci PLASTIKOS, wanda ke nufin ana iya siffata shi ko a yi shi.Ana amfani da kusan kashi ɗaya bisa uku na robobin da aka samar don yin marufi.Ana amfani da ɗayan na uku don siding da famfo.Tsabtataccen filastik gabaɗaya baya narkewa a cikin ruwa kuma ba mai guba ba.Duk da haka, yawancin abubuwan da ke cikin robobi suna da guba kuma suna iya shiga cikin yanayi.Misalan abubuwan ƙari masu guba sun haɗa da phthalates.Polymers marasa guba kuma suna iya raguwa zuwa sinadarai lokacin zafi.
Bayan karanta wannan, shin kun zurfafa fahimtar ku akan robobi?
Lokacin aikawa: Satumba-17-2022