ʻO ka viscosity a me ka mālama wai o nā cellulose ethers

ʻO ka cellulose ether he mea nui loa ia i loko o nā morta maloʻo. No ka mea he mea mālama wai koʻikoʻi me nā waiwai mālama wai maikaʻi. Hiki i kēia waiwai paʻa wai ke pale i ka wai i loko o ka mortar pulu mai ka evaporating prematurely a i ʻole e komo ʻia e ka substrate, e hoʻolōʻihi i ka manawa hana o ka mortar pulu, e hōʻoia i ka hoʻomaʻemaʻe piha ʻana o ka sima, a no laila e hōʻoiaʻiʻo i nā waiwai mechanical o ka mortar, ka mea. ʻoi aku ka maikaʻi o ka hana ʻana i nā morta lahilahi (e like me ka plastering mortars) a me nā morta i loko o nā substrate e hoʻoheheʻe nui ʻia (e like me nā poloka aerated concrete), ka wela kiʻekiʻe a me nā kūlana maloʻo.

ʻO ka waiwai paʻa wai o cellulose pili loa i kona viscosity. ʻO ke kiʻekiʻe o ka viscosity o cellulose ether, ʻoi aku ka maikaʻi o ka hana paʻa wai. ʻO ka viscosity kahi mea koʻikoʻi o ka hana MC. I kēia manawa, hoʻohana nā mea hana MC ʻokoʻa i nā ʻano like ʻole a me nā mea hana e hoʻāʻo ai i ka viscosity o MC, a ʻo nā ʻano kumu nui ʻo Haake Rotovisko, Hoppler, Ubbelohde a me Brookfield. No ka huahana like, ʻokoʻa nā hopena viscosity i ana ʻia e nā ʻano hana like ʻole, a ʻokoʻa loa kekahi. No laila, i ka hoʻohālikelike ʻana i nā viscosities, he mea nui ia e hana ma waena o nā ʻano hoʻokolohua like, me ka mahana, rotor, etc.

ʻO ka ʻōlelo maʻamau, ʻoi aku ka kiʻekiʻe o ka viscosity, ʻoi aku ka maikaʻi o ka hopena paʻa wai. Eia nō naʻe, ʻoi aku ka kiʻekiʻe o ka viscosity, ʻoi aku ka kiʻekiʻe o ke kaumaha molekala o MC a me ka emi ʻana o kona solubility, kahi hopena maikaʻi ʻole i ka ikaika a me ke kūkulu ʻana o ka mortar. ʻO ke kiʻekiʻe o ka viscosity, ʻoi aku ka maopopo o ka hopena mānoanoa ma ka mortar. ʻOi aku ka kiʻekiʻe o ka viscosity, ʻoi aku ka ʻoi aku o ka paʻa o ka mortar pulu, ma ke kūkulu ʻana, e like me ka mea i hōʻike ʻia e ka ʻōpala paʻa a me ka pili kiʻekiʻe i ka substrate. Akā naʻe, ʻaʻole ia e kōkua nui i ka hoʻonui ʻana i ka ikaika o ke kūkulu ʻana o ka mortar pulu ponoʻī. Ke kūkulu ʻia ʻelua, hōʻike ia i ka hana anti-sagging ʻaʻole maopopo. ʻO ka mea ʻē aʻe, ʻoi aku ka maikaʻi o ka hoʻomaikaʻi ʻana i ka ikaika hana o ka mortar pulu.