I-Polyetherimide, ebizwa ngokuthi i-PEI ngesiNgisi, i-Polyetherimide, ebukeka inhlaka, iwuhlobo lwepulasitiki ekhethekile yobunjiniyela be-amorphous thermoplastic eyethula ibhondi ye-ether eguquguqukayo (- Rmae Omi R -) ibe yi-polyimide eqinile yeketango elide.
Isakhiwo se-PEI
Njengohlobo lwe-thermoplastic polyimide, i-PEI ingathuthukisa ngokuphawulekayo i-thermoplasticity embi kanye nokucutshungulwa okunzima kwe-polyimide ngokwethula ibhondi ye-ether (- Rmurmurr R -) ochungechungeni oluyinhloko lwe-polymer kuyilapho igcina ukwakheka kwendandatho ye-polyimide.
Izici ze-PEI
Izinzuzo:
Amandla aqine kakhulu, angaphezu kuka-110MPa.
Amandla okugoba aphezulu, angaphezu kuka-150MPa.
Umthamo omuhle kakhulu wokuthwala i-thermo-mechanical, izinga lokushisa lokushintsha elishisayo likhulu noma lilingana no-200 ℃.
Ukumelana kahle nokukhasa kanye nokumelana nokukhathala.
Ukubambezeleka kwelangabi okuhle kakhulu kanye nentuthu ephansi.
Izakhiwo ezinhle kakhulu ze-dielectric kanye ne-insulation.
Ukuzinza kwe-dimensional okuhle kakhulu, i-coefficient ephansi yokwanda okushisayo.
Ukumelana nokushisa okuphezulu, kungasetshenziswa ku-170 ℃ isikhathi eside.
Ingadlula kuma-microwave.
Ububi:
Iqukethe i-BPA (bisphenol A), ekhawulela ukusetshenziswa kwayo emikhiqizweni ehlobene nezinsana.
Ukuzwela komthelela we-notch.
Ukumelana ne-alkali kuvamile, ikakhulukazi ngaphansi kwezimo zokushisa.
I-PEEK
I-PEEK yesayensi yegama le-polyether ether ketone iwuhlobo lwe-polymer equkethe ibhondi ye-ketone eyodwa namabhondi e-ether amabili esakhiweni seketango eliyinhloko. Kuyinto ekhethekile ye-polymer. I-PEEK inokubukeka oku-beige, ukucutshungulwa okuhle, ukushibilika nokumelana nokugqoka, ukumelana okuhle kokukhasa, ukumelana okuhle kakhulu kwamakhemikhali, ukumelana kahle ne-hydrolysis kanye nesitimu esishisa kakhulu, imisebe yokushisa ephezulu, izinga lokushisa eliphezulu lokuguquguquka okushisayo kanye nokuhlehla okuhle komlilo wangaphakathi.
I-PEEK yaqala ukusetshenziswa emkhakheni we-aerospace ukuze ithathele indawo i-aluminium, i-titanium nezinye izinto zensimbi ukuze kwenziwe izingxenye zangaphakathi nezangaphandle zendiza. Ngenxa yokuthi i-PEEK inezakhiwo ezinhle kakhulu ezihlanganisayo, ingangena esikhundleni sezinto ezivamile ezifana nezinsimbi nezitsha zobumba emikhakheni eminingi ekhethekile. Ukumelana nokushisa kwayo okuphezulu, ukuzigcoba, ukumelana nokugqoka kanye nokumelana nokukhathala kuyenza ibe enye yepulasitiki yobunjiniyela esebenza kahle kakhulu.
Njengempahla ye-polymer ye-thermoplastic, izici ze-PEI ziyafana nalezo ze-PEEK, noma nokushintshwa kwe-PEEK. Ake sibheke umehluko phakathi kwakho kokubili.
| I-PEI | I-PEEK | |
| Ukuminyana (g/cm3) | 1.28 | 1.31 |
| Amandla Okuqina (MPa) | 127 | 116 |
| Amandla e-Flexural (Mpa) | 164 | 175 |
| I-Ball Indentity Hardness (MPa) | 225 | 253 |
| I-GTT(Glass-transition Temperature) (℃) | 216 | 150 |
| I-HDT (℃) | 220 | 340 |
| Izinga Lokushisa Lokusebenza Lesikhathi eside (℃) | 170 | 260 |
| Ukumelana Okuqondile Kobuso (Ω) | 10 14 | 10 15 |
| I-UL94 Flame Retardant | V0 | V0 |
| Ukumuncwa kwamanzi (%) | 0.1 | 0.03 |
Uma kuqhathaniswa ne-PEEK, ukusebenza okuphelele kwe-PEI kudonsa amehlo kakhulu, futhi inzuzo yayo enkulu isezindlekweni, okuyisizathu esiyinhloko esenza ukuthi ezinye izinto zokwakha zendiza zikhethwe izinto eziyinhlanganisela ye-PEI. Izindleko eziphelele zezingxenye zayo ziphansi kunezensimbi, izinhlanganisela ze-thermosetting nezinhlanganisela ze-PEEK. Kumele kuqashelwe ukuthi nakuba ukusebenza kwezindleko ze-PEI kuphakeme kakhulu, ukumelana kwayo nokushisa akuphakeme kakhulu.
Ezincibilikisini ezine-chlorine, ukuqhekeka kwengcindezi kwenzeka kalula, futhi ukumelana nezinyibilikisi zemvelo akulungile njengalokho kwe-semi-crystalline polymer PEEK. Lapho icutshungulwa, noma ngabe i-PEI inokucutshungulwa kwamapulasitiki obunjiniyela be-thermoplastic bendabuko, idinga izinga lokushisa eliphakeme lokuncibilika.
Isikhathi sokuthumela: 03-03-23