Hydroxypropyl methyl cellulose na ciment na plasta dabeere gypsum

HPMC Hydroxypropyl methyl cellulose na ciment ngwa agha na gypsum slurry, tumadi na-arụ ọrụ nke mmiri njigide na ndim, nwere ike n'ụzọ dị irè melite adhesion na sag iguzogide slurry.

Okpomọkụ ikuku, ọnọdụ okpomọkụ na ọnụego ikuku nwere ike imetụta ọnụ ọgụgụ mmiri nke evaporation na ngwa ngwa ciment na ngwaahịa gypsum.Ya mere, n'oge dị iche iche, ịgbakwunye hydroxypropyl methyl cellulose otu ego nke ngwaahịa na-ejide mmiri mmetụta nwere ụfọdụ ọdịiche.N'ime ihe owuwu ihe, enwere ike gbanwee mmetụta njide mmiri nke slurry site na ịba ụba ma ọ bụ ibelata ego HPMC.Njide mmiri nke methyl cellulose ether na okpomọkụ dị elu bụ ihe dị mkpa na-egosi ọdịiche dị mma nke methyl cellulose ether.

Ngwaahịa usoro hydroxypropyl methyl cellulose dị mma nwere ike dozie nsogbu nke njigide mmiri n'okpuru oke okpomọkụ.Na elu okpomọkụ oge, karịsịa na-ekpo ọkụ na akọrọ ebe na mkpa oyi akwa ewu na anwụ na-acha n'akụkụ, mkpa maka elu àgwà HPMC ka mma na mmiri njigide nke slurry;hydroxypropyl methyl cellulose (HPMC), ịdị n'otu dị ezigbo mma, ọ bụ ikuku oxygen na oxygen hydroxypropyl dị iche iche na-ekesa n'otu n'otu n'otu agbụ cellulose, nwere ike melite hydroxyl na ether oxygen na mmiri na isi ihe na-akpakọrịta ụdị hydrogen bonding ike, na-eme ka free mmiri nke hydration, ka i wee chịkwaa nke ọma ihu igwe na-ekpo ọkụ nke mmiri na-eme ka mmiri na-ekupụ, nweta njigide mmiri dị elu.

High mma nke hydroxypropyl methyl cellulose nwere ike uniformly na n'ụzọ dị irè gbasasịa na ciment ngwa agha na plasta ngwaahịa, na ngwugwu niile siri ike ahụ, na-etolite a oyi akwa nke wetting film, na mmiri na isi ruo ogologo oge ji nwayọọ nwayọọ tọhapụrụ, na inorganic cementitious ihe hydration mmeghachi omume. , ka iji hụ na ike nkekọ na mkpakọ ike nke ihe.

N'ime ihe owuwu ahụ, iji nweta mmetụta nke nchekwa mmiri, ọ dị mkpa ịgbakwunye ngwaahịa HPMC dị elu dị ka usoro ahụ si dị, ma ọ bụghị ya, a ga-enwe ihicha ngwa ngwa kpatara hydration na-ezughị ezu, mbelata ike, cracking, oghere oghere na ịwụfu àgwà. nsogbu, ma na-amụbakwa ihe isi ike nke ndị ọrụ na-ewu ụlọ.Ka okpomọkụ na-ebelata, a pụrụ iji nwayọọ nwayọọ belata ọnụ ọgụgụ mmiri HPMC, na otu mmetụta njigide mmiri nwere ike nweta.