IHydroxypropyl methylcellulose inika udaka olumanzi kunye ne-viscosity egqwesileyo, enokunyusa kakhulu amandla okudibanisa phakathi kodaka olumanzi kunye nomgangatho wesiseko, kunye nokuphucula ukusebenza kwe-anti-sag yodaka.Isetyenziswa ngokubanzi kwi-plastering mortar, inkqubo yokugquma udonga lwangaphandle kunye nokudibanisa izitena kwidaka.Isiphumo sokutyeba se-cellulose ether inokunyusa i-homogeneity kunye nesakhono sokuchasa ukusasazeka kwezinto ezixutywe ngesamente, zithintele i-delamination, ulwahlulo kunye nokopha kodaka kunye nekhonkrithi, kwaye ingasetyenziselwa kwikhonkrithi yefiber, ikhonkrithi engaphantsi kwamanzi kunye nekhonkrithi yokuzidibanisa. .
IHydroxypropyl methylcelluloseHPMCkwandisa i-viscosity yezinto ezisekelwe kwi-samente ukusuka kwi-viscosity yesisombululo se-cellulose ether.Isalathiso se "viscosity" sihlala sisetyenziselwa ukuvavanya i-viscosity yesisombululo se-cellulose ether.I-viscosity ye-cellulose ether ngokubanzi ibhekisela kwisisombululo se-cellulose ether kunye noxinzelelo oluthile (njenge-2%).Isantya (okanye izinga lokujikeleza, njenge-20 rpm), ixabiso le-viscosity elilinganiswe nesixhobo esichaziweyo sokulinganisa (njenge-viscometer ejikelezayo).
I-Viscosity yiparameter ebalulekileyo yokuvavanya ukusebenza kwe-cellulose ether.Ukuphakama kwe-viscosity yesisombululo se-hydroxypropyl methylcellulose, ngcono i-viscosity yezinto ezisekelwe kwi-samente, bhetele ukunamathela kwi-substrate, kwaye bhetele i-anti-sagging kunye ne-anti-dispersion capabilities.Yomelele, kodwa ukuba i-viscosity yayo inkulu kakhulu, iya kuchaphazela umbane kunye nokusebenza kwezinto ezisekelwe kwisamente (njengokuncamathela imela yokutyabeka ngexesha lokwakhiwa kodaka).Ke ngoko, i-viscosity ye-cellulose ether esetyenziswa kumdaka oxubeneyo owomileyo idla ngokuba yi-15,000 ~ 60,000 mPa.I-S-1, i-self-leveling mortar kunye ne-self-compacting concrete, efuna i-fluidity ephezulu, idinga i-viscosity ephantsi ye-cellulose ether.
Ukongeza, isiphumo esityebileyo se-hydroxypropyl methylcellulose siya kwandisa imfuno yamanzi yezixhobo ezisekelwe kwisamente, ngaloo ndlela inyusa isivuno sodaka.
I-viscosity yezisombululo ze-hydroxypropyl methylcellulose ixhomekeke kwezi zinto zilandelayo:
Ubunzima bemolekyuli (okanye idigri yepolymerization) kunye noxinzelelo lwe-cellulose ether, ubushushu besisombululo, izinga le-shear kunye nendlela yokuvavanya.
1. Iqondo eliphezulu le-polymerization ye-cellulose ether kunye nobukhulu be-molecular weight, iphezulu i-viscosity yesisombululo sayo samanzi;
2. Okukhona idosi ephezulu (okanye i-concentration) ye-cellulose ether, iphezulu i-viscosity yesisombululo sayo samanzi, kodwa kufuneka kuthathelwe ingqalelo ukukhetha idosi efanelekileyo xa uyisebenzisa, ukwenzela ukuba ingachaphazeli ukusebenza kodaka kunye nekhonkrithi ukuba idosi iphezulu kakhulu;
3. Njengamanzi amaninzi, i-viscosity yesisombululo se-ether ye-cellulose iya kuncipha ngokunyuka kweqondo lokushisa, kwaye iphezulu i-concentration ye-cellulose ether, impembelelo enkulu yeqondo lokushisa;
4. Isisombululo se-cellulose ether ngokuqhelekileyo i-pseudoplastic, enepropati ye-shear thinning.Ixabiso elikhulu lokucheba ngexesha lovavanyo, lisezantsi i-viscosity.
Ngoko ke, ukudityaniswa kodaka kuya kuncitshiswa ngenxa yamandla angaphandle, okunenzuzo ekukhutsheni ukwakhiwa kodaka, ukwenzela ukuba udaka lunokusebenza kakuhle kunye nokubambisana ngexesha elifanayo.Nangona kunjalo, isisombululo se-cellulose ether siya kubonisa iimpawu ze-Newtonian fluid xa i-concentration iphantsi kakhulu kwaye i-viscosity incinci.Xa ugxininiso lukhula, isisombululo siya kubonisa ngokuthe ngcembe iimpawu ze-pseudoplastic fluid, kwaye ukuphakama koxinzelelo, kucacile ngakumbi i-pseudoplasticity.
Ixesha lokuposa: Dec-20-2022