Ifomula yamakhemikhali yi--OCH2-CH2OCOC6H4CO- Igama lesiNgisi: i-polyethylene terephthalate, elifingqiwe ngokuthi i-PET, iyi-polymer ephezulu, etholakala ekusabeleni kokuphelelwa amanzi emzimbeni kwe-ethylene terephthalate. I-ethylene terephthalate itholakala ngokusabela kwe-esterification kwe-terephthalic acid kanye ne-ethylene glycol. I-PET iyi-polymer emhlophe noma ephuzi elikhanyayo, ekristalu kakhulu enendawo ebushelelezi nekhazimulayo. Inezakhiwo ezinhle kakhulu zomzimba nezemishini ebangeni elibanzi lokushisa. Izinga lokushisa lokusetshenziswa isikhathi eside lingafinyelela ku-120°C. Ukufakwa kukagesi kuhle kakhulu. Ngisho noma izinga lokushisa liphezulu kanye nemvamisa ephezulu, izakhiwo zayo zikagesi zisezinhle, kodwa ukumelana kwe-corona kubi. Ukumelana nokukhukhuleka, ukumelana nokukhathala, ukumelana nokungqubuzana, kanye nokuzinza kobukhulu konke kuhle kakhulu.
inzuzo
1, inezakhiwo ezinhle zomshini, amandla omthelela aphindwe ka-3 ~ 5 kunamanye amafilimu, futhi ukumelana nokugoqa kuhle.
2, ukumelana namafutha, amafutha, i-asidi encishisiwe, i-alkali encishisiwe, kanye nezinyibilikisi eziningi.
3, inokumelana okuhle kakhulu nokushisa okuphezulu nokuphansi. Ingasetshenziswa isikhathi eside ebangeni lokushisa elingu-120℃, futhi ingamelana nokushisa okuphezulu okungu-150℃ kanye nokushisa okuphansi okungu--70℃ ekusetshenzisweni kwesikhathi esifushane, futhi izakhiwo zemishini zokushisa okuphezulu nokuphansi azinawo umphumela omkhulu.
4, ukungena kwegesi nomhwamuko wamanzi kuphansi, okungukuthi, kunokumelana okuhle kakhulu kwegesi, amanzi, uwoyela kanye nephunga.
5, ukukhanya okuphezulu, kungavimba imisebe ye-ultraviolet, kukhanye kahle.
6, ayinabo ubuthi, ayinambitheki, ihlanzekile futhi iphephile, ingasetshenziswa ngqo ekupakisheni ukudla.
I-PET iyi-polymer emhlophe noma ephuzi ekhanyayo ekristalu kakhulu enendawo ebushelelezi necwebezelayo. Ukumelana okuhle kokuqhekeka, ukumelana nokukhathala, ukumelana nokungqubuzana kanye nokuqina kobukhulu, ukuguguleka okuphansi kanye nokuqina okuphezulu, enokuqina okukhulu phakathi kwezinto ze-thermoplastic: ukufudumala okuhle kukagesi, ithonya lokushisa eliphansi, kodwa ukumelana ne-corona okuphansi. Izinga lokushisa, ukumelana nesimo sezulu, ukuqina okuhle kokumelana namakhemikhali, ukumuncwa kwamanzi okuphansi, ukumelana nama-acid abuthakathaka kanye nezinyibilikisi eziphilayo, kodwa azicwiliswa emanzini ashisayo kanye ne-alkali. I-PET resin inokushisa okuphezulu kokuguquka kwengilazi, isivinini se-crystallization esihamba kancane, umjikelezo omude wokubumba, umjikelezo omude wokubumba, ukuncipha okukhulu kokubumba, ukuzinza okuncane kobukhulu, ubuthakathaka bokubumba kwekristalu, kanye nokumelana nokushisa okuphansi. Ngokuthuthukisa i-ejenti ye-nucleating, i-ejenti ye-crystallization kanye nokuqinisa i-fiber yengilazi, i-PET inezici ezilandelayo ngaphezu kwezakhiwo ze-PBT:
1, izinga lokushisa lokuphambukisa ukushisa kanye nezinga lokushisa lokusetshenziswa isikhathi eside yizona eziphakeme kakhulu phakathi kwezinto ezisetshenziswa kabanzi ze-thermoplastic.
2, ngenxa yokumelana kwayo nokushisa okuphezulu, i-PET eqinisiwe ifakwa ebhavini lokusoda ku-250°C imizuzwana eyi-10, futhi cishe ayishintshi umbala. Ifaneleka kakhulu ekulungiseleleni izingxenye zikagesi nezikagesi ezisodayo.
3, amandla okugoba angama-200Mpa, i-modulus enwebekayo ingu-4000Mpa, ukumelana nokukhasa nokukhathala nakho kuhle kakhulu, ubulukhuni bomphezulu buphezulu, futhi izakhiwo zemishini zifana nepulasitiki ye-thermosetting.
4, njengoba i-ethylene glycol esetshenziswa ekukhiqizweni kwe-PET icishe ibe yisigamu sentengo ye-butylene glycol esetshenziswa ekukhiqizweni, i-PET resin kanye ne-PET eqinisiwe yizona ntengo eziphansi kakhulu phakathi kwamapulasitiki obunjiniyela futhi zisebenza kahle kakhulu.