Polyethylene terephthalate Motsoako oa lik'hemik'hale ke -OCH2-CH2OC6H4CO- Lebitso la Senyesemane: polyethylene terephthalate, e khutsufalitsoeng e le PET, ke polymer e phahameng, e tsoang ho dehydration condensation reaction ea ethylene terephthalate.Ethylene terephthalate e fumanoa ka karabelo ea esterification ea terephthalic acid le ethylene glycol.PET ke 'mala o mosoeu oa lebese kapa o mosehla o khanyang, o khanyang haholo, o nang le bokaholimo bo boreleli le bo benyang.E na le thepa e babatsehang ea 'mele le ea mechine sebakeng se pharaletseng sa mocheso.Thempereichara ea tšebeliso ea nako e telele e ka fihla ho 120°C.Insulation ea motlakase e ntle haholo.Leha e le mocheso o phahameng le maqhubu a phahameng, thepa ea eona ea motlakase e ntse e le ntle, empa khanyetso ea corona e fokola.Creep resistance, mokhathala o sa khathaleng, khanyetso ea likhohlano, le botsitso ba dimensional kaofela li ntle haholo.
molemo
1, e na le thepa e ntle ea mochini, matla a ts'usumetso ke makhetlo a 3 ~ 5 a lifilimi tse ling, 'me ho hanyetsa ho phutha ho lokile.
2, e hanana le oli, mafura, asiti e hlapollang, e hlapolla alkali, le lihlapolli tse ngata.
3, e na le khanyetso e ntle haholo ea mocheso o phahameng le o tlase.E ka sebelisoa nako e telele mocheso oa mocheso oa 120 ℃, 'me o khona ho mamella mocheso o phahameng oa 150 ℃ le mocheso o tlase oa -70 ℃ ka tšebeliso ea nako e khutšoanyane,' me thepa ea mechine ea mocheso o phahameng le o tlaase o na le phello e fokolang.
4, ho kenella ha mouoane oa khase le metsi ho tlase, ke hore, ho na le khase e ntle haholo, metsi, oli le monko o hanyetsang.
5, pepeneneng e phahameng, e ka thibela mahlaseli a ultraviolet, khanya e ntle.
6, e seng chefo, e sa latsoeheng, bohloeki bo botle le polokeho, e ka sebelisoa ka kotloloho bakeng sa ho paka lijo.
PET ke polima e bosoeu ba lebese kapa bosehla bo bobebe bo khanyang haholo bo boreleli ebile bo benya.Khanyetso e ntle ea ho lla, ho hanyetsa mokhathala, ho hanyetsa likhohlano le botsitso ba sebopeho, ho senyeha ho tlase le ho thatafala ho hoholo, ka ho tiea ho hoholo har'a lisebelisoa tsa thermoplastic: ts'ebetso e ntle ea motlakase, tšusumetso e tlase ea mocheso, empa khanyetso e mpe ea corona.Mocheso, ho hanyetsa boemo ba leholimo, botsitso bo botle ba lik'hemik'hale, ho monya metsi a tlaase, ho hanyetsa li-acids tse fokolang le li-solvents, empa ha li qoelisoe ka metsing a chesang le alkali.Resin ea PET e na le mocheso o phahameng oa phetoho ea likhalase, lebelo le liehang la kristale, potoloho e telele ea ho bopa, potoloho e telele ea ho bopa, shrinkage e kholo ea ho bopa, botsitso bo fokolang ba sebopeho, ho bopeha ha kristale le ho hanyetsa mocheso o tlase.Ka ntlafatso ea nucleating agent, crystallization agent le glass fiber reinforcement, PET e na le litšobotsi tse latelang ho phaella ho thepa ea PBT:
1, mocheso o sothang mocheso le mocheso oa ts'ebeliso ea nako e telele ke tsona tse phahameng ka ho fetisisa har'a lisebelisoa tse akaretsang tsa thermoplastic.
2, ka lebaka la ho hanyetsa mocheso o phahameng, PET e matlafalitsoeng e qoelisoa ka bateng ea solder ka 250 ° C ka metsotsoana ea 10, 'me hoo e ka bang ha e fetole' mala.E loketse ka ho khetheha bakeng sa ho lokisoa ha likarolo tsa elektronike le tsa motlakase tse rekisoang.
3, matla a ho kobeha ke 200Mpa, modulus elastic ke 4000Mpa, khanyetso ea creep le mokhathala le eona e ntle haholo, boima ba bokaholimo bo phahame, 'me thepa ea mochini e tšoana le polasetiki ea thermosetting.
4, kaha ethylene glycol e sebelisoang ha ho etsoa PET ke hoo e batlang e le halofo ea theko ea butylene glycol e sebelisoang tlhahiso, PET resin le PET e matlafalitsoeng ke theko e tlaase ka ho fetisisa har'a li-plastiki tsa boenjiniere 'me li na le ts'ebetso ea theko e phahameng.