Ngokuqhelekileyo sifunda ngeeplastiki ngokwembonakalo, umbala, uxinzelelo, ubungakanani, njl., ngoko ke kuthekani ngeeplastiki kwimbono yekhemikhali?
I-Synthetic resin iyona nxalenye ephambili yeplastiki, kwaye umxholo wayo kwiplastiki ngokuqhelekileyo i-40% ukuya kwi-100%.Ngenxa yomxholo omkhulu kunye neepropathi zee-resin ezihlala zichaza iipropathi zeplastiki, abantu bahlala bejonga ii-resin njengezinto ezifanayo kunye neeplastiki.
Iplastiki yikhompawundi yepolymer eyenziwe nge-monomer njengemathiriyeli ekrwada kunye nepolymerized ngokongezwa okanye ukusabela kwe-polycondensation.Ukuchasana kwayo ne-deformation kumodareyitha, phakathi kwefiber kunye nerubha.Iqulethwe izongezo ezifana nee-agent kunye nee-pigments.
Inkcazo yePlastiki kunye noKubunjwa: Iplastiki yiyo nayiphi na i-polymer ephilayo okanye eyokwenziwa kwe-semi-synthetic.Ngamanye amazwi, iplastiki ihlala inekhabhoni kunye nehydrogen, nangona ezinye izinto zinokubakho.Ngelixa iiplastiki zinokwenziwa phantse kuyo nayiphi na i-polymer ephilayo, uninzi lweeplastiki zemizi-mveliso zenziwe ngeepetrochemicals.I-Thermoplastics kunye ne-thermoset polymers ziindidi ezimbini zeeplastiki.Igama elithi "iplastiki" libhekisela kwiplastiki, ukukwazi ukuguqula ngaphandle kokuphuka.Iipolymers ezisetyenziselwa ukwenza iiplastiki ziphantse zixutywe kunye nezongezo, kubandakanywa imibala, iiplastiki, izizinzi, izihlungi kunye ne-reinforcing agents.Ezi zongezo zichaphazela ukubunjwa kweekhemikhali, iikhemikhali kunye neepropathi zomatshini zeplastiki, kunye neendleko.
I-Thermosets kunye ne-Thermoplastics: Iipolymers ze-Thermoset, ezikwabizwa ngokuba yi-thermosets, zonyango zibe yimo esisigxina.Ziyi-amorphous kwaye zikholelwa ukuba zinobunzima obungenasiphelo bemolekyuli.I-Thermoplastics, kwelinye icala, inokufudunyezwa kwaye iphinde ilungiswe ngokuphindaphindiweyo.Ezinye i-thermoplastics zi-amorphous, ngelixa ezinye zine-crystalline structure.I-Thermoplastics idla ngokuba ne-molecular weights phakathi kwe-20,000 kunye ne-500,000 AMU.
Ixesha lokuposa: Sep-17-2022