I-Polyethylene terephthalate Ifomula yamakhemikhali ithi -OCH2-CH2OC6H4CO- Igama lesiNgisi: i-polyethylene terephthalate, efushanisiwe njenge-PET, i-polymer ephezulu, etholakala ekuphenduleni kokuphelelwa amandla kwamanzi kwe-ethylene terephthalate.I-Ethylene terephthalate itholakala ngokusabela kwe-esterification ye-terephthalic acid ne-ethylene glycol.I-PET iyi-milky emhlophe noma ephuzi ngokukhanyayo, i-polymer ecwebe kakhulu enendawo ebushelelezi futhi ecwebezelayo.Inezici ezinhle kakhulu zomzimba nemishini ebangeni elibanzi lokushisa.Izinga lokushisa lokusebenzisa isikhathi eside lingafinyelela ku-120°C.I-insulation kagesi inhle kakhulu.Ngisho nasezingeni eliphezulu lokushisa kanye nemvamisa ephezulu, izakhiwo zayo zikagesi zisezinhle, kodwa ukumelana ne-corona kubi.Ukumelana ne-Creep, ukumelana nokukhathala, ukumelana nokungqubuzana, nokuzinza kwe-dimensional konke kuhle kakhulu.
inzuzo
I-1, inezici ezinhle zemishini, amandla omthelela angama-3 ~ 5 izikhathi zamanye amafilimu, futhi ukumelana nokugoqa kuhle.
2, imelana namafutha, amafutha, i-asidi ehlanjululwayo, i-alkali ehlanjululwe, kanye nezincibilikisi eziningi.
3, inokumelana okuhle kakhulu nokushisa okuphezulu nokuphansi.Ingasetshenziswa isikhathi eside ebangeni lokushisa elingu-120℃, futhi ingamelana nezinga lokushisa eliphakeme elingu-150℃ kanye nezinga lokushisa eliphansi elingu--70℃ ekusetshenzisweni kwesikhashana, kanye nezakhiwo zemishini zokushisa okuphezulu nokuphansi zinomphumela omncane.
4, igesi ne-vapor permeability iphansi, okungukuthi, inokumelana okuhle kakhulu kwegesi, amanzi, uwoyela kanye nephunga.
5, ukukhanya okuphezulu, kungavimba imisebe ye-ultraviolet, isicwebezelisi esihle.
I-6, engeyona enobuthi, ayinambitheki, inhlanzeko enhle nokuphepha, ingasetshenziswa ngqo ekupakisheni ukudla.
I-PET iyi-polymer emhlophe qhwa noma ephuzi ngokukhanyayo enendawo ebushelelezi futhi ecwebezelayo.Ukumelana okuhle nokukhasa, ukumelana nokukhathala, ukumelana nokungqubuzana nokuzinza kohlangothi, ukuhuzuka okuphansi nokuba lukhuni okuphezulu, nokuqina okukhulu phakathi kwezinto ezisetshenziswa yi-thermoplastic: ukufakwa kahle kukagesi, ithonya eliphansi lokushisa, kodwa ukumelana ne-corona okungekuhle.Izinga lokushisa, ukumelana nesimo sezulu, ukuzinza okuhle kokumelana namakhemikhali, ukumuncwa kwamanzi aphansi, ukumelana nama-acids abuthakathaka nezincibilikisi eziphilayo, kodwa hhayi emanzini ashisayo ne-alkali.I-PET resin inezinga lokushisa eliphezulu lokushintsha kwengilazi, isivinini esisheshayo sekristalu, umjikelezo omude wokubumba, umjikelezo omude wokubumba, ukuncipha okukhulu kokubumba, ukuqina okungekuhle kwe-dimensional, ukubola kokubumba kwekristalu, nokumelana nokushisa okuphansi.Ngokuthuthukiswa kwe-nucleating agent, i-crystallization agent kanye ne-glass fiber reinforcement, i-PET inezici ezilandelayo ngaphezu kwezakhiwo ze-PBT:
I-1, izinga lokushisa lokuhlanekezelwa kokushisa kanye nezinga lokushisa lokusetshenziswa kwesikhathi eside liphakeme kakhulu phakathi kwezinto ezihloselwe i-thermoplastic jikelele.
2, ngenxa yokumelana nokushisa okuphezulu, i-PET eqinisiwe icwiliswa kubhavu we-solder ku-250 ° C imizuzwana engu-10, futhi cishe ayishintshi umbala.Ifaneleka ngokukhethekile ukulungiswa kwezingxenye ze-elekthronikhi nezikagesi ezithengiswayo.
3, amandla okugoba angama-200Mpa, i-elastic modulus ingu-4000Mpa, ukumelana nokukhasa nokukhathala nakho kuhle kakhulu, ubulukhuni bobuso buphezulu, futhi izakhiwo zemishini zifana nepulasitiki ye-thermosetting.
I-4, njengoba i-ethylene glycol esetshenziswa ekukhiqizeni i-PET icishe ibe yingxenye yentengo ye-butylene glycol esetshenziswa ekukhiqizeni, i-PET resin kanye ne-PET eqinisiwe iyinani eliphansi kakhulu phakathi kwamapulasitiki obunjiniyela futhi anezindleko eziphezulu zokusebenza.