Izici zefilimu ze-PI zebhodi le-mica

1. Ngokuya ngokuhlaziywa kwe-thermogravimetric, izinga lokushisa lokubola kwe-polyimide enamakha ngokuphelele cishe icishe ibe ngama-500 ℃. I-polyimide eyenziwe nge-biphenyl dianhydride ne-p-phenylenediamine inokushisa okubola okushisayo okungama-600 ℃, okungenye yezinhlobo eziphakeme kakhulu zokuqina kwama-polymers kuze kube manje.

2. I-Polyimide ingamelana namazinga okushisa aphansi ngokweqile, njengokuthi angaqhekeki futhi aqhephuke ku-liquid helium ngo -269 ° C.

3. I-Polyimide inezakhiwo ezinhle kakhulu zemishini. Amandla aqine epulasitiki angagcwalisiwe angaphezulu kuka-100Mpa, ifilimu iKapton (Kapton) ingaphezulu kuka-170Mpa, kanti uhlobo lwe-biphenyl polyimide (UpilexS) lufinyelela ku-400Mpa. Njengeplastiki yobunjiniyela, inani lefilimu enwebekayo imvamisa i-3-4 Gpa, futhi i-fiber ingafinyelela kuma-200 Gpa. Ngokwezibalo zethiyori, i-fiber eyenziwe nge-phthalic anhydride ne-p-phenylenediamine ingafinyelela kuma-500 Gpa, okwesibili kuphela kune-carbon fiber.

4. Ezinye izinhlobo ze-polyimide azincibiliki kumakhemikhali awuketshezi angokwemvelo, azinzile ekunciphiseni ama-asidi, futhi izinhlobo ezijwayelekile azimelene ne-hydrolysis. Lokhu kusebenza okubonakala kuyisephutha kwenza i-polyimide umehluko omkhulu kwamanye ama-polymers asebenza kahle kakhulu. Isici salokhu ukuthi izinto zokusetshenziswa i-dianhydride ne-diamine zingatholwa yi-alkaline hydrolysis. Isibonelo, ngefilimu yeKapton, izinga lokutakula lingafinyelela ku-80% -90%. Ukushintsha ukwakheka nakho kungakhiqiza izinhlobo eziphikisana kakhulu ne-hydrolysis, njengalezo ezingamelana nokubila ngo-120 ° C amahora angama-500.

5. I-coefficient yokwanda kwe-polyimide engu-2 × 10-5-3 × 10-5 ° C, i-Guangcheng i-thermoplastic polyimide ingu-3 × 10-5 ° C, uhlobo lwe-biphenyl lungafinyelela ku-10-6 ° C, kanti izinhlobo ngazinye ziyatholakala . Kuze kufike ku-10-7 ° C.

6. I-Polyimide inokuphikiswa okukhulu kwemisebe, futhi isilinganiso sayo sokugcina amandla kwefilimu singama-90% ngemuva kwe-5 × 109rad i-electron irradiation esheshayo.

7. I-Polyimide inezakhiwo ezinhle ze-dielectric. Ukuhlala kwe-dielectric cishe kungu-3.4. Kwethulwa i-fluorine noma kuhlakazeka usayizi we-nanometer womoya ku-polyimide, i-dielectric engaguquki ingancishiswa icishe ibe ngu-2.5. Ukulahleka kwe-dielectric yi-10-3, futhi amandla we-dielectric yi-100-300KV / mm. Lezi zakhiwo zisengagcinwa ezingeni eliphezulu ebangeni lokushisa elibanzi nakububanzi bemvamisa.