ISINGENISO ESISISEKELO SE-POLYURETHANE RUBBER
Ikhodi (UR) iyi-polymerization ye-polyester (noma i-polyether) kanye nenhlanganisela ye-disocyanate. Ukwakheka kwayo kwamakhemikhali kuyinkimbinkimbi kakhulu kunama-polymer anwebekayo ajwayelekile. Ngaphezu kwamaqembu e-urethane aphindaphindayo, uchungechunge lwamangqamuzana ngokuvamile luqukethe namaqembu e-ester, amaqembu e-ether, amaqembu anephunga elimnandi nokunye okunjalo.
Iketango eliyinhloko le-molecule ye-UR liqukethe ingxenye eguquguqukayo kanye nengxenye eqinile; ingxenye eguquguqukayo ibizwa nangokuthi ingxenye ethambile futhi yakhiwe i-oligomer polyol (njenge-polyester, i-polyether, i-polybutadiene, njll.); Ingxenye eqinile ibizwa ngokuthi umkhiqizo wokusabela we-disocyanate (njenge-TDI, i-MDI, njll.) kanye ne-molecular chain extender encane (njenge-diamine ne-glycol). Amasegimenti athambile asebenza ngaphezu kwamasegimenti aqinile. Ukuqina kwezingxenye ezithambile neziqinile zihlukile. Izingxenye eziqinile ziyi-polar futhi kulula ukuqoqa ndawonye. Izingxenye ezincane eziningi zakhiwe esigabeni sesigaba esithambile, esibizwa ngokuthi isakhiwo sokuhlukaniswa kwesigaba esincane. Izakhiwo zayo ezingokomzimba nezomshini kanye nesigaba esincane Izinga lokuhlukaniswa lihlobene kakhulu nalo.
Iketango eliyinhloko le-molecule ye-UR linamandla aphezulu kanye nokunwebeka okuphezulu ngenxa yokusebenzisana kwamabhondi e-hydrogen.
Izici: Inezinzuzo zobulukhuni obuphezulu, amandla amahle, ukunwebeka okuphezulu, ukumelana nokugqoka okuphezulu, ukumelana nezinyembezi, ukumelana nokuguga, ukumelana ne-ozone, ukumelana nemisebe kanye nokuhamba kahle kukagesi. Ayifani nerabha ejwayelekile.
Isikhathi sokuthumela: Sep-02-2019