Ama-Plasticizers ku-Coating Formulations
AmaPulasitiki asetshenziselwa ukulawula inqubo yokwakheka kwefilimu yezingubo ezisekelwe ezintweni zokwakha ifilimu ezomisa ngokomzimba. Ukwakheka kwefilimu okufanele kubalulekile ukuze kuhlangatshezwane nezidingo zezakhiwo ezithile zokumboza njengokubukeka kwefilimu eyomile, ukunamathela kwe-substrate, ukuqina, kuhlanganiswe nezinga eliphakeme lokuqina ngesikhathi esifanayo.
Ama-Plasticizers asebenza ngokunciphisa izinga lokushisa lokubunjwa kwefilimu futhi anwebe ukumbozwa; ama-plasticizers asebenza ngokuzishumeka phakathi kwamaketanga ama-polymers, ahlukanise phakathi (ukwandisa "ivolumu yamahhala"), futhi ngaleyo ndlela ehlise kakhulu izinga lokushisa lokuguqulwa kwengilazi ku-polymer nokwenza kube lula.
Ama-molecule akuzinto zokwakha ifilimu ye-polymeric, njenge-nitrocellulose (NC), ngokuvamile abonisa ukuhamba kweketango eliphansi, okuchazwa ukusebenzisana okuqinile kwamangqamuzana (okuchazwa amandla e-van der Waals) wamaketanga e-polymer. Indima ye-plasticizer ukunciphisa noma ukuvimbela ngokuphelele ukwakheka kwalezi zibopho zokubopha. Uma kwenzeka ama-polymers okwenziwa lokhu kungafezwa ngokuhlanganisa izingxenye ezinwebekayo noma ama-monomers avimbela kakhulu ukusebenzisana kwamangqamuzana; le nqubo yokuguqulwa kwamakhemikhali yaziwa ngokuthi "i-plasticization yangaphakathi". Okwemveloral imikhiqizo noma ama-polymers aqinile wokucubungula okungalungile, inketho yi-plasticizers yokusetshenziswa kwangaphandle ekubunjweni kokugqoka
Ama-Plasticizer asebenzisana ngokomzimba ne-molecule ye-polymer binder, ngaphandle kokusabela kwamakhemikhali futhi akhe uhlelo olufanayo. Ukusebenzisana kusekelwe esakhiweni esithile se-plasticizer, ngokuvamile equkethe izingxenye ze-polar nezingezona ze-polar, futhi kuphumela ekwehliseni izinga lokushisa lengilazi (Tg). Ukuze kuqinisekiswe ukusebenza kahle okuphezulu, i-plasticizer kufanele ikwazi ukungena ku-resin ezimweni zokwenza ifilimu.
Ama-plastizer angama-Classic ayizinto ezinesisindo esiphansi samangqamuzana, njenge-phthalate esters. Kodwa-ke, muva nje imikhiqizo yamahhala ye-phthalate iyakhethwa njengoba ukusetshenziswa kwe-phthalate esters kukhawulelwe ngenxa yokukhathazeka kokuphepha komkhiqizo.