Izinto ezimbini zenziwe ngezinto ezifanayo, kodwa ubungakanani bezinto ezihlukeneyo, imeko ebunjiweyo ithambile kwelinye icala kwaye ilukhuni kwelinye.
Ingxowa yeplastiki yePVC
Umbala wendalo utyheli ngokuguquguqukayo kwaye uyakhazimla.Ukucaca kungcono kune-polyethylene kunye ne-polypropylene, kodwa ngaphantsi kwe-polystyrene.Ngokuxhomekeke kubungakanani bezongezo, inokuhlulwa ibe yi-polyvinyl chloride ethambileyo kwaye ilukhuni.Iimveliso ezithambileyo zinokuguquguquka, ukuqina kunye nokuncamathela.Ubunzima beemveliso ezinzima kukuba i-polyethylene ephantsi, kodwa ukuba iphantsi kune-polypropylene, ukumhlophe kuya kwenzeka kwii-bends.Iimveliso eziqhelekileyo: iipleyiti, iipayipi, ii-soles, iithoyi, iingcango kunye neefestile, i-wire sheaths, izinto zokubhala, njl njl. Yimpahla yepolymer esebenzisa i-athomu ye-chlorine endaweni yee-athomu ze-hydrogen kwi-polyethylene.
IiPropati zeMichiza kunye nezoMzimba zePVC (i-Polyvinyl Chloride) I-PVC enzima yenye yezona zinto zisetyenziswa kakhulu kwiplastiki.Imathiriyeli yePVC yimathiriyeli ye-amorphous.Ekusetyenzisweni kwangempela kwezinto zePVC, izinzile, izithambiso, unyango oluncedisayo, ii-pigments, iimpembelelo kunye nezinye izongezo zihlala zongezwa [2].
imathiriyeli yePVC ayinakutsha, yomelele, iyamelana nemozulu kwaye inozinzo oluhle kakhulu lwejometri.I-PVC ixhathisa kakhulu kwii-oxidizing agents, ii-agent zokunciphisa kunye nee-acids ezinamandla.Nangona kunjalo, inokugqweswa yi-acids oxidizing egxininisiweyo efana ne-sulfuric acid egxininisiweyo kunye ne-nitric acid, kwaye ayifanelekanga ukudibana ne-hydrocarbons enevumba elimnandi okanye i-chlorinated.
Ukushisa okunyibilikayo kwePVC ngexesha lokucubungula kuyinkqubo ebaluleke kakhulu ipharamitha.Ukuba le parameter ayifanelekanga, iingxaki zokubola kwezinto ziya kwenzeka.Iimpawu zokuhamba kwePVC zihlupheke kakhulu kwaye uluhlu lwenkqubo yalo luncinci kakhulu.Izinto eziphantsi ze-molecular weight PVC zidla ngokusetyenziswa, ngakumbi ngenxa yokuba izinto ze-PVC ezinobunzima obuphezulu bemolekyuli kunzima ukuqhubekeka (olu hlobo lwemathiriyeli ludla ngokufuna ukongezwa kwezithambiso ukuphucula iimpawu zokuhamba).Izinga lokunciphisa i-PVC liphantsi kakhulu, ngokubanzi i-0.2-0.6%.
Ixesha lokuposa: Oct-20-2021
