Iimpawu ze-Thermal kunye noomatshini: isifundo
Ibonisa ukuba i-HPMC inokuphucula i-thermal kunye ne-mechanical properties yokutyabeka udaka. Ngokudibanisa imilinganiselo eyahlukeneyo ye-HPMC (0.015%, 0.030%, 0.045%, kunye ne-0.060%), abaphandi bafumanisa ukuba izinto ezilula zingaveliswa ngokunciphisa ubunzima be-11.76% ngenxa ye-porosity ephezulu ebangelwa yi-HPMC. Le porosity ephezulu inceda ekugqumeni kwe-thermal, ukunciphisa umbane wezinto eziphathekayo ukuya kuthi ga kwi-30% ngelixa ugcina ubushushu obusisigxina malunga ne-49 W xa uphantsi kobushushu obufanayo. Ukuchasana nokuhanjiswa kobushushu ngephaneli kwahluka kunye nenani le-HPMC eyongeziweyo, kunye nokubandakanywa okuphezulu kwe-additive kubangela ukunyuka kwe-32.6% kwi-thermal resistance xa kuthelekiswa nomxube wereferensi.
Ukugcinwa kwamanzi, ukusebenza kunye namandla: esinye isifundo
Kwafunyaniswa ukuba i-HPMC inokuphucula ngokubonakalayo ukugcinwa kwamanzi, ukudityaniswa kunye nokuxhathisa kwe-sag yodaka, kwaye iphucule ngokubonakalayo amandla okuqina kunye namandla okubopha udaka. Ngelo xesha, i-HPMC inokuthintela ngokufanelekileyo ukubunjwa kweentanda zeplastiki kwi-mortar kunye nokunciphisa isalathisi sokuqhekeka kweplastiki. Ukugcinwa kwamanzi odaka kunyuka njengoko i-viscosity ye-HPMC isanda. Xa i-viscosity ye-HPMC idlula i-40000 mPa·s, ukugcinwa kwamanzi akusenyuka kakhulu.
Indlela yokuvavanya i-viscosity: Xa ufunda indlela yokuvavanya i-viscosity ephezulu ye-viscosity hydroxypropyl methylcellulose
, yafumanisa ukuba i-HPMC ine-dispersion elungileyo, i-emulsification, i-thickening, i-bonding, ukugcinwa kwamanzi kunye neempawu zokugcina iglue. Ezi propati zenza i-HPMC isetyenziswe ngokubanzi kushishino lokwakha.
Uzinzo lweVolumu: Uphononongo ngesiphumo sedosi ye-HPMC kumthamo wokuqala uzinzo we-Portland sement-aluminate sement-gypsum ternary composite self-leveling mortar.
Ibonisa ukuba i-HPMC inefuthe elibonakalayo ekusebenzeni kodaka lokuzilinganisa. Emva kokubandakanya i-HPMC, ukusebenza kodaka lokuzilinganisa olufana nokopha kunye nokuhlaliswa kokwahlula kuphuculwe kakhulu. Nangona kunjalo, idosi egqithisileyo ayincedi kumanzi odaka oluzilinganisayo. Olona mthamo ufanelekileyo yi-0.025%~0.05%. Kwangaxeshanye, njengoko umxholo we-HPMC usanda, amandla oxinzelelo kunye namandla okuguquguquka kwe-self-leveling mortar yehla ukuya kumaqondo ahlukeneyo.
Impembelelo kumandla emizimba eluhlaza eyenziwe ngeplastiki eyenziwe nge-ceramic: uvavanyo
Isiphumo semixholo eyahlukeneyo ye-HPMC kumandla aguquguqukayo emizimba ye-ceramic eluhlaza yaphononongwa, kwaye kwafunyaniswa ukuba amandla okuguquguquka kuqala anyuka kwaye ayancipha ngokunyuka komxholo we-HPMC. Xa isixa se-HPMC esongezelelweyo sasiyi-25%, amandla omzimba oluhlaza ayewona aphezulu kwi-7.5 MPa.
Ukusebenza kodaka lomxube owomileyo: isifundo
Kwafunyaniswa ukuba amanani ahlukeneyo kunye ne-viscosities ye-HPMC ineempembelelo ezibalulekileyo ekusebenzeni okusebenzayo kunye neempawu zemishini yodaka oluxubekileyo. I-HPMC inamandla okugcina amanzi kunye nokujiya. Xa i-dosage iphezulu kune-0.6%, i-fluidity ye-mortar iyancipha; xa i-dosage yi-0.4%, izinga lokugcinwa kwamanzi kwi-mortar lingafikelela kwi-100%. Nangona kunjalo, i-HPMC iwanciphisa kakhulu amandla, ukuya kuthi ga kwi-75%.
Iziphumo kwisamente-zinziswe kubunzulu obugcweleyo bomxube owenziwe ngokutsha: uphononongo
Kwafunyaniswa ukuba i-HPMC iya kunciphisa amandla okuguquguquka kunye nokunyanzeliswa kweesampuli zodaka lwesamente emva kwe-cement hydration ngenxa ye-air-entraining effect. Nangona kunjalo, i-samente ifakwe emanzini kwi-dispersion ye-HPMC inyibilikiswe emanzini. Xa kuthelekiswa nesamente ene-hydrated kuqala kwaye ixutywe kunye ne-HPMC, amandla okuguquguquka kunye nokunyanzeliswa kwemizekelo yodaka lwesamente ayanda.
Ezi datha zovavanyo kunye neziphumo zophando zibonisa ukuba i-HPMC inefuthe elihle ekuphuculeni ukugcinwa kwamanzi kwidaka, ukuphucula ukusebenza, kunye nokuphucula ukusebenza kwe-thermal, kodwa kunokuba nefuthe kumandla kunye nokuzinza kwevolumu yodaka. Ke ngoko, kwizicelo ezisebenzayo, idosi kunye neenkcukacha ze-HPMC kufuneka zikhethwe ngokufanelekileyo ngokusekwe kwiimfuno ezithile zobunjineli kunye neemeko zokusingqongileyo ukuze kuphunyezwe ukusebenza kodaka.
Ixesha lokuposa: Oct-29-2024