Izakhiwo ezahlukene zepulasitiki zinquma ukusetshenziswa kwayo embonini.Ngokuthuthuka kobuchwepheshe, ucwaningo ngokuguqulwa kwepulasitiki alukayeki.Yiziphi izici eziyinhloko zamapulasitiki?
1. Amapulasitiki amaningi anesisindo esincane, azinzile kumakhemikhali, futhi ngeke agle;
2. Ukumelana nomthelela omuhle;
3. Inokukhanya okuhle nokumelana nokugqoka;
4. Ukwahlukanisa okuhle kanye ne-conductivity ephansi yokushisa;
5. Ukwakheka okujwayelekile kanye nokubalabala kuhle, futhi izindleko zokucubungula ziphansi;
6. Amapulasitiki amaningi anokumelana nokushisa okuphansi, izinga eliphezulu lokunwetshwa kokushisa futhi kulula ukuwashisa;
7. Ukungaqini kahle kwe-dimensional futhi kulula ukukhubaza;
8. Amapulasitiki amaningi awakwazi ukumelana nezinga lokushisa eliphansi, aba brittle lapho izinga lokushisa eliphansi liphansi futhi kulula ukuguga;
9. Amanye amapulasitiki ancibilika kalula kuzincibilikisi.
10. Ipulasitiki ingahlukaniswa ngezigaba ezimbili: i-thermosetting ne-thermoplastic.Eyangaphambili ayikwazi ukubunjwa kabusha ukuze isetshenziswe, futhi lokhu okulandelayo kungaphinda kukhiqizwe.I-Thermoplasticity inobude obukhulu bomzimba, ngokuvamile obungu-50% kuya ku-500%.Amandla awahlukani ngokuphelele ngokomugqa kumabude ahlukene.
Kunezinhlobo ezimbili eziyisisekelo zezinhlaka zamangqamuzana epulasitiki: eyokuqala iyisakhiwo somugqa, futhi inhlanganisela ye-polymer enalesi sakhiwo ibizwa ngokuthi i-linear polymer compound;okwesibili isakhiwo somzimba, kanti i-polymer compound enalesi sakhiwo ibizwa ngokuthi i-compound.Kuyinhlanganisela ye-polymer eningi.Amanye ama-polymers anamaketanga anamagatsha, abizwa ngokuthi ama-polymers e-branched, ayingxenye yesakhiwo somugqa.Nakuba amanye ama-polymer anezixhumanisi eziphambanayo phakathi kwama-molecule, kodwa izixhumanisi eziphambanayo ezincane, ezibizwa ngokuthi isakhiwo senethiwekhi, ziyingxenye yesakhiwo somzimba.
Izakhiwo ezimbili ezihlukene, ezibonisa izakhiwo ezimbili eziphambene.Isakhiwo somugqa, ukushisa kungancibilika, ubulukhuni obuncane kanye nokuqina.Isakhiwo somzimba sinobulukhuni obukhulu kanye nokuqina.Amapulasitiki anezinhlaka ezimbili zama-polymers, ama-thermoplastics enziwe ngama-polymer aqondile, namapulasitiki ashisayo enziwe ngama-polymers ayinqwaba.
Isikhathi sokuthumela: Jul-23-2022