Lintho tsa 'Mele le Lik'hemik'hale tsa Resin ea Polyethylene
Lintho tsa 'Mele le Lik'hemik'hale tsa Resin ea Polyethylene
Mefuta ea Lik'hemik'hale
Polyethylene e na le botsitso bo botle ba lik'hemik'hale 'me e hanela ho hlapolla asiti ea nitric, e hlapolla sulfuric acid le motsoako ofe kapa ofe oa hydrochloric acid, hydrofluoric acid, phosphoric acid, formic acid, acetic acid, metsi a ammonia, amines, hydrogen peroxide, sodium hydroxide, potasiamo hydroxide, joalo-joalo. tharollo. Empa ha e hanyetsane le kutu e matla ea oxidative, joalo ka fuming sulfuric acid, concentrated nitric acid, chromic acid le motsoako oa sulfuric acid. Mocheso oa kamore, li-solvents tse boletsoeng ka holimo li tla senya polyethylene butle-butle, ha 90-100 ° C, acid e ngata ea sulfuric le concentrated nitric acid e tla senya polyethylene ka potlako, e etse hore e senyehe kapa e senyehe. Polyethylene e bonolo ho e-na le oxidized photo-oxidized, thermally oxidized, e qhibilihisoa ke ozone, 'me e senyeha habonolo tlas'a ketso ea mahlaseli a ultraviolet. Carbon black e na le phello e ntle ea ho sireletsa leseli holim'a polyethylene. Maikutlo a kang cross-linking, chain scission, le ho thehoa ha lihlopha tse sa tsitsang li ka etsahala ka mor'a mahlaseli.
Mechanical thepa
Thepa ea mochini oa polyethylene ke liphatsa tsa lefutsoral, matla a ho tsitsa a tlase, khanyetso ea creep ha e ntle, 'me ho hanyetsa tšusumetso ho molemo. Matla a tšusumetso LDPE> LLDPE> HDPE, thepa e meng ea mochini LDPE crystallinity le boima ba limolek'hule tse lekanyelitsoeng, ka ntlafatso ea matšoao ana, thepa ea eona ea mochini e eketseha. Khatello ea tikoloho ea khatello ea maikutlo ha e ntle, empa ha boima ba molek'hule bo eketseha, boa ntlafala. Khanyetso e ntle ea ho phunya, eo har'a eona LLDPE e leng eona e ntle ka ho fetisisa.
Litšobotsi tsa tikoloho
Polyethylene ke alkane inert polymer e nang le botsitso bo botle ba lik'hemik'hale. E hanyetsana le ho bola ka asiti, alkali le letsoai litharollo tse nang le metsi ka mocheso oa kamore, empa ha e hanyetsane le li-oxidants tse matla tse kang oleum, concentrated nitric acid le chromic acid. Polyethylene ha e qhibilihe ka har'a metsoako e tloaelehileng e ka tlase ho 60 ° C, empa e tla ruruha kapa e petsoha ha e kopana nako e telele le li-aliphatic hydrocarbons, li-hydrocarbon tse nkhang hamonate, li-halogenated hydrocarbons, joalo-joalo. , amyl acetate, trichlorethylene, turpentine, ea karal oli le parafine; ha mocheso o phahame ho feta 100 ℃, o ka qhibiliha ka tetralka.
Kaha limolek'hule tsa polyethylene li na le li-bond tse nyenyane tse peli le litlamo tsa ether, ho pepeseha ha letsatsi le pula ho tla baka botsofali, bo hlokang ho ntlafatsoa ka ho eketsa li-antioxidants le li-stabilizers tse khanyang.
Litšobotsi tsa ts'ebetso
Hobane LDPE le HDPE li na le mokelikeli o motle, mocheso o tlase oa ts'ebetso, viscosity e itekanetseng, mocheso o tlaase oa ho bola, 'me ha li bole ka mocheso o phahameng oa 300 ℃ ka khase ea inert, ke lipolasetiki tse nang le ts'ebetso e ntle ea ts'ebetso. Leha ho le joalo, viscosity ea LLDPE e phahame hanyane, 'me matla a motlakase a hloka ho eketseha ka 20% ho isa ho 30%; e na le tšekamelo ea ho qhibiliha fracture, kahoo hoa hlokahala ho eketsa lekhalo la lefu le ho eketsa lisebelisoa tsa ho sebetsa; mocheso oa ho sebetsa o phahame hanyane, ho fihla ho 200 ho isa ho 215 °C. Polyethylene e na le metsi a fokolang 'me ha e hloke ho omisoa pele e sebetsa.
Polyethylene melt ke mokelikeli oo e seng oa Newtonian, 'me viscosity ea eona e feto-fetoha hanyenyane le mocheso, empa e fokotseha ka potlako ka keketseho ea sekhahla sa ho kuta 'me e na le kamano e haufi, eo LLDPE e nang le ho fokotseha butle haholo.
Lihlahisoa tsa polyethylene li bonolo ho kristale nakong ea pholileng, ka hona, tlhokomelo e lokela ho lefshoa mocheso oa hlobo nakong ea ts'ebetso. E le ho laola crystallinity ea sehlahisoa, e le hore se na le thepa e fapaneng. Polyethylene e na le shrinkage e kholo ea ho bopa, e lokelang ho nahanoa ha ho etsoa hlobo.
Lintho tsa 'Mele le Lik'hemik'hale tsa Resin ea Polyethylene