Umahluko wezakhiwo zomzimba kunye neekhemikhali kunye nokusetyenziswa kwe-HPMC kunye ne-HEMC kwishishini lokwakha

Umahluko wezakhiwo zomzimba kunye neekhemikhali kunye nokusetyenziswa kwe-HPMC kunye ne-HEMC kwishishini lokwakha

I-Hydroxypropyl Methylcellulose (HPMC) kunye ne-Hydroxyethyl Methylcellulose (HEMC) ziintlobo ezimbini ze-cellulose ethers ezisetyenziswa ngokuqhelekileyo kushishino lokwakha. Ngelixa babelana ngezinto ezifanayo, kukwakho umahluko ophambili kwiimpawu zabo zomzimba kunye neekhemikhali, kunye nezicelo zabo.

Iinkcazelo Ngeempawu:

1. Ukunyibilika: I-HPMC kunye ne-HEMC zombini zinyibilika emanzini, oku kuthetha ukuba zinyibilika ngokulula emanzini ukwenza isisombululo esicacileyo. Nangona kunjalo, i-solubility ye-HEMC ingcono kune-HPMC.
2. I-Viscosity: Zombini i-HPMC kunye ne-HEMC zi-thickeners kwaye zibonisa ukuziphatha kwe-pseudoplastic, oku kuthetha ukuba i-viscosity yabo iyancipha xa iphantsi koxinzelelo lwe-shear. I-HEMC ngokubanzi ine-viscosity ephezulu kune-HPMC.
3. Ukugcinwa kwamanzi: Zombini i-HPMC kunye ne-HEMC ziyaziwa ngokugqwesileyo kweendawo zokugcina amanzi, ezenza zibe luncedo kwizicelo zokwakha apho ukulawulwa komswakama kubalulekile.

Iinkcazelo ngeMichiza:

1. Ubume beMichiza: Umahluko omkhulu phakathi kwe-HPMC kunye ne-HEMC ilele kubume bemichiza yabo. I-HPMC ineqela le-hydroxypropyl elifakwe kwi-cellulose backbone, ngelixa i-HEMC ineqela le-hydroxyethyl eliqhotyoshelweyo.
2. I-Chemical Reactivity: Zombini i-HPMC kunye ne-HEMC zi-ethers ze-cellulose ze-nonionic kwaye ngoko zizinzileyo kwiikhemikhali. Nangona kunjalo, i-HEMC isebenze ngakumbi kune-HPMC ngenxa yobukho beqela le-ethyl, elenza kube lula ngakumbi kwi-hydrolysis.

Usetyenziso:

1. Izicelo ze-HPMC: I-HPMC idla ngokusetyenziswa kwizinto zokuncamathelisa iithayile, udaka lwesamente, kunye neemveliso ezisekelwe kwigypsum ngenxa yogcino lwamanzi olugqwesileyo kunye neempawu ezityebisayo. Ikwasetyenziswa kwiinkqubo zangaphandle zokugquma kunye nokugqiba (EIFS) ukuphucula ukusebenza kodaka.
2. Izicelo ze-HEMC: I-HEMC isetyenziswa ngokuqhelekileyo kwi-samente-based mortars, i-adhesives tile, kunye neemveliso ezisekelwe kwi-gypsum ngenxa yezinto eziphezulu zokugcina amanzi. Ikwasetyenziswa nakwii-self-leveling compounds, apho isebenza njenge-arhente yokulawula ukuhamba.

Isishwankathelo, i-HPMC kunye ne-HEMC zimbini iintlobo ze-cellulose ethers ezisetyenziswa ngokuqhelekileyo kushishino lokwakha. Ngelixa besabelana ngezinto ezifanayo, ezifana nokunyibilika kwamanzi, i-pseudoplastic behaviour, kunye neempawu ezigqwesileyo zokugcina amanzi, kukwakho umahluko ophambili kwiipropathi zabo zomzimba kunye neekhemikhali, kunye nezicelo zabo. I-HPMC isetyenziswa ngokuqhelekileyo kwi-adhesives tile, i-cement mortars, kunye neemveliso ezisekelwe kwi-gypsum, ngelixa i-HEMC isetyenziswa ngokuqhelekileyo kwi-samente-based mortars, i-adhesives tile, kunye ne-self-leveling compounds.