Kedu ihe ga-emetụta viscosity nke hydroxypropyl methylcellulose?

N'ihi na ngwa nke mmiri ngwa agha, hydroxypropyl methylcellulose nwere ezi ndim Njirimara, nwere ike budata dịkwuo bonding ikike n'etiti mmiri ngwa agha na isi oyi akwa, na nwekwara ike melite mgbochi sag arụmọrụ nke ngwa agha, n'ihi ya, ọ na-ọtụtụ-eji na plasta Mortar, mpụga. mgbidi mkpuchi usoro na brik bonding ngwa agha.

N'ihi na ndim mmetụta nke cellulose ether, ọ nwekwara ike dịkwuo homogeneity na mgbochi mgbasa ikike nke freshly agwakọta simenti dabeere ihe, na nwekwara ike igbochi nsogbu nke delamination, segregation na ọbara ọgbụgba na ngwa agha na ihe. Enwere ike itinye ya na kọmpụta a na-eme ka fiber na-eme ka ọ dị ike, mmiri dị n'okpuru mmiri na kọmpat nke onwe ya.

Hydroxypropyl methylcellulose nwere ike ịbawanye arụmọrụ viscous nke ihe ndị sitere na ciment. Ọrụ a na-esite na viscosity nke cellulose ether solution. N'ozuzu, ọnụọgụ index nke viscosity na-eji ikpe ikpe viscosity nke cellulose ether ngwọta, mgbe cellulose The viscosity nke ether na-emekarị tumadi na-ezo aka a ụfọdụ ịta nke cellulose ether ngwọta, na-emekarị 2%, na a kpọmkwem okpomọkụ, dị ka 20 degrees na. ọnụ ọgụgụ ntụgharị, na-eji ngwa ihe atụ akọwapụtara, dị ka viscometer ntụgharị. Uru viscosity.

Viscosity bụ otu n'ime ihe ndị dị mkpa iji nyochaa arụmọrụ cellulose ether. Ka viscosity nke hydroxypropyl methylcellulose ngwọta dị elu, ka mma viscosity nke ihe ndị dabeere na ciment na-eme ka mma na-arụ ọrụ na-arụ ọrụ nke ọma na mkpụrụ. N'otu oge ahụ, ọ nwere The mgbochi-sagging ike na mgbochi mgbasa ike ike, ma ọ bụrụ na viscosity ya dị elu, ọ ga-emetụta eruba arụmọrụ na operability nke ciment dabeere ihe.

Kedu ihe ga-emetụta viscosity nke hydroxypropyl methylcellulose? Ọ kachasị dabere n'ihe ndị a.

1. The elu ogo nke polymerization nke cellulose ether nke hydroxypropyl methylcellulose, ibu ibu ya molekụla arọ, na-eme ka elu viscosity nke mmiri mmiri ngwọta.

2. Ọ bụrụ na ọnụọgụ ma ọ bụ ntinye nke cellulose ether dị elu, viscosity nke ngwọta mmiri ya ga-adị elu. Otú ọ dị, ekwesịrị ịkpachara anya iji họrọ ọnụọgụ cellulose ether kwesịrị ekwesị mgbe ị na-eji ya, karịsịa ka ịzere nnukwu ether cellulose. Ọ ga-emetụta arụmọrụ nke ngwa agha na kọmpat.

3. Dị ka ọtụtụ mmiri mmiri, viscosity nke cellulose ether ngwọta ga-ebelata na mmụba nke okpomọkụ, na elu ntinye nke cellulose ether, na-ebelata okpomọkụ. Mmetụta dị ukwuu.

4. Ihe ngwọta cellulose ether na-abụkarị pseudoplastic, nke nwere njirimara nke ịkpụ ntutu. Ka ọnụ ọgụgụ dị ukwuu nke ịkwa akwa n'oge ule, ka viscosity dị ntakịrị.

A ga-ebelata ịdị n'otu nke ngwa agha n'ihi ọrụ nke ike dị n'èzí, bụ nke na-enyekwa aka n'ịkpụcha ngwa agha, na-eme ka nkwonkwo dị mma na ịrụ ọrụ nke ngwa agha n'otu oge. Otú ọ dị, ọ bụrụ na ngwọta cellulose ether nwere ntinye dị elu Mgbe viscosity dị ala na viscosity dị ntakịrị, ọ ga-egosi njirimara nke mmiri mmiri Newtonian. Mgbe ntinye uche na-abawanye, ihe ngwọta ga-eji nwayọọ nwayọọ gosi njirimara nke mmiri mmiri pseudoplastic, ma ọ bụrụ na ntinye uche dị elu, pseudoplasticity ga-apụta ìhè karị.