IiPropati zeMzimba kunye nezeMichiza yePolyethylene Resin
IiPropati zeMzimba kunye nezeMichiza yePolyethylene Resin
Iimpawu zeMichiza
I-Polyethylene inozinzo oluhle lweekhemikhali kwaye iyamelana nokungxenga i-nitric acid, i-sulfuric acid encibilikayo kunye naluphi na uxinaniso lwe-hydrochloric acid, i-hydrofluoric acid, i-phosphoric acid, i-formic acid, i-acetic acid, amanzi ammonia, i-amines, i-hydrogen peroxide, i-sodium hydroxide, i-potassium hydroxide, njl. isisombululo. Kodwa ayixhathisi kwi-corrosion eyomeleleyo ye-oxidative, efana ne-fuming sulfuric acid, i-nitric acid egxininisiweyo, i-chromic acid kunye nomxube we-sulfuric acid. Kwiqondo lokushisa lokushisa, i-solvents ekhankanywe ngasentla iya kutshabalalisa ngokukhawuleza i-polyethylene, ngelixa i-90-100 ° C, i-sulfuric acid egxininisiweyo kunye ne-nitric acid egxininisiweyo iya kutshabalalisa ngokukhawuleza i-polyethylene, ibangele ukuba ibhujiswe okanye ichithe. I-Polyethylene kulula ukuba i-photo-oxidized, i-thermal oxidized, idibaniswe yi-ozone, kwaye ithotywe ngokulula phantsi kwesenzo semitha ye-ultraviolet. Ikhabhoni emnyama inefuthe elihle kakhulu lokukhusela ukukhanya kwi-polyethylene. Ukusabela okufana nokudibanisa, i-chain scission, kunye nokuqulunqwa kwamaqela angaxutywanga kunokwenzeka emva kwe-irradiation.
Iimpawu zemizi
Iimpawu zomatshini ze-polyethylene ziyi-general, amandla okuqina aphantsi, ukuxhathisa kwe-creep akulunganga, kwaye ukuchasana kwempembelelo kulungile. Amandla empembelelo LDPE>LLDPE>HDPE, ezinye iimpawu mechanical LDPE crystallinity kunye nobunzima molecular ubunzima, kunye nokuphuculwa kwezi zalathisi, iimpawu zayo mechanical ukwanda. Ukuxhatshazwa koxinzelelo lwendalo akulunganga, kodwa xa ubunzima bemolekyuli bunyuka, buphucula. Ukumelana nokugqobhoza okulungileyo, phakathi kwayo i-LLDPE yeyona ilungileyo.
Iimpawu zokusingqongileyo
I-Polyethylene yi-alkane inert polymer kunye nokuzinza okulungileyo kweekhemikhali. Iyakwazi ukumelana nokubola nge-asidi, i-alkali kunye nezisombululo ezimanzi zetyuwa kwindawo yobushushu begumbi, kodwa ayixhathisi kwii-oxidants ezinamandla ezifana ne-oleum, i-nitric acid egxininisiweyo kunye ne-chromic acid. I-Polyethylene ayinyibiliki kwizinyibilikisi eziqhelekileyo ezingaphantsi kwe-60 ° C, kodwa iya kudumba okanye iqhekeke kuqhagamshelwano lwexesha elide kunye ne-aliphatic hydrocarbons, i-hydrocarbons enuka kamnandi, i-halogenated hydrocarbons, njl. , amyl acetate, trichlorethylene, turpentine, yamral ioli kunye neparafini; xa ubushushu bungaphezulu kwe-100℃, inokunyibilika kwi-tetralngaphakathi.
Ekubeni iamolekyu ze-polyethylene ziqulethe i-double bonds kunye neebhondi ze-ether, ukukhanya kwelanga kunye nemvula kuya kubangela ukuguga, okufuneka kuphuculwe ngokungeza i-antioxidants kunye ne-stabilizers yokukhanya.
Iimpawu zokucwangcisa
Ngenxa yokuba i-LDPE kunye ne-HDPE zine-fluidity efanelekileyo, iqondo lokushisa eliphantsi, i-viscosity ephakathi, iqondo lokushisa eliphantsi lokubola, kwaye aziboli kubushushu obuphezulu obungama-300 ℃ kwigesi engasebenziyo, ziiplastiki ezinomsebenzi omhle wokucubungula. Nangona kunjalo, i-viscosity ye-LLDPE iphezulu kancinci, kwaye amandla emoto kufuneka anyuswe nge-20% ukuya kwi-30%; iyancibilika i-fracture, ngoko ke kuyimfuneko ukwandisa i-gap yokufa kunye nokongeza izixhobo zokusebenza; iqondo lobushushu bokusebenza liphezulu kancinci, ukuya kuthi ga kuma-200 ukuya kuma-215 °C. I-Polyethylene ine-absorption yamanzi ephantsi kwaye ayifuni ukomiswa ngaphambi kokucubungula.
I-Polyethylene inyibilika ilulwelo olungelulo olwaseNewtonian, kwaye i-viscosity yayo iguquguquka kancinci ngeqondo lobushushu, kodwa yehla ngokukhawuleza ngokunyuka kwereyithi yokucheba kwaye inobudlelwane bomgca, phakathi kwayo i-LLDPE inokuncipha kancinci.
Iimveliso ze-polyethylene zilula ukukhazimla ngexesha lokupholisa, ngoko ke, ingqalelo kufuneka ihlawulwe kwiqondo lokushisa lokubumba ngexesha lokucubungula. Ukuze ulawule i-crystallinity yemveliso, ukuze ibe neepropati ezahlukeneyo. I-Polyethylene ine-shrinkage enkulu yokubumba, ekufuneka ithathelwe ingqalelo xa uyila ukubumba.
IiPropati zeMzimba kunye nezeMichiza yePolyethylene Resin