Umehluko phakathi kwe-HEC ne-HPMC

I-HEC (Hydroxyethyl Cellulose) kanye ne-HPMC (Hydroxypropyl Methylcellulose) womabili asetshenziswa kabanzi embonini kapende njengama-thickeners kanye nama-rheology modifiers. Ngenkathi babelana ngokufana okuthile, kukhona futhi umehluko oyinhloko ezimpahleni zabo nasekusetshenzisweni kwazo.

Omunye umehluko omkhulu phakathi kwe-HEC ne-HPMC usekwakheni kwamakhemikhali awo. I-HEC itholakala ku-cellulose ngokungezwa kwamaqembu e-ethylene oxide, kuyilapho i-HPMC ihlanganiswa ku-cellulose ngokufaka i-propylene oxide namaqembu e-methyl. Lokhu kuhlukahluka kwesakhiwo kubangela umehluko ekusebenzeni kwawo ekubunjweni kopende.

Mayelana nesicelo, i-HEC yaziwa ngokugcina amanzi kahle kanye nezindawo ezijiyayo, okuyenza ifanelekele ukusetshenziswa kumapende asekelwe emanzini. Kuyasiza ukuthuthukisa i-viscosity nokuzinza kopende, okuvumela ukusetshenziswa okungcono nokumbozwa. Ngakolunye uhlangothi, i-HPMC inikeza amandla afanayo okujiya kanye nokugcina amanzi, kodwa futhi inikeza ukumelana nokucwila okuthuthukisiwe kanye nesikhathi esingcono sokuvula ekwenziweni kopende. Lokhu kukwenza kube yisinqumo esikhethwayo sokusebenzisa izintambo ezisebenza kahle kakhulu namapende e-latex.

Omunye umehluko obalulekile phakathi kwe-HEC ne-HPMC ukuhambisana kwazo nezinye izithasiselo zikapende. I-HEC izwela kakhulu ku-pH nama-electrolyte, okungakhawulela ukuhambisana kwayo nezithasiselo ezithile kanye nokwakheka. Ngokuphambene, i-HPMC ibonisa ukusebenzisana okungcono nohlu olubanzi lwezithasiselo, okuyenza ibe ukukhetha okuguquguqukayo kwezinhlelo ezihlukahlukene zokupenda.

Ngaphezu kwalokho, i-HPMC yaziwa ngezakhiwo zayo zokwenza ifilimu, ezingaba nomthelela ekuqineni kukonke nasekusebenzeni kwefilimu kapende. Lokhu kuyenza ibe isithako esibalulekile kumapende angaphandle nasezindaweni ezinenamathela lapho ukumelana nesimo sezulu nokuvikela isikhathi eside kubalulekile.

Sengiphetha, ngenkathi kokubili i-HEC ne-HPMC inikeza izinzuzo zokujiya kanye ne-rheological ekwakhiweni kopende, umehluko wabo wesakhiwo samakhemikhali, ukusebenza, nokuhambisana kubenza bafaneleke izinhlobo ezahlukene zamapende nezingubo. Ukuqonda lo mehluko kubalulekile kubadidiyeli ukuthi bakhethe isithasiselo esifaneleka kakhulu sokuzuza izici zopende ezifiselekayo nokusebenza.