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1. Chiyambi: Hydroxypropyl Methylcellulose (HPMC) ndi polima wogwiritsidwa ntchito kwambiri m'mafakitale osiyanasiyana, kuphatikizapo mankhwala, zomangamanga, ndi chakudya. Chimodzi mwa ntchito zake zazikulu ndikusintha mawonekedwe a rheological a suspensions. Rheology, kuphunzira kayendedwe ndi kusintha kwa m...Werengani zambiri»
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HPMC, kapena hydroxypropyl methylcellulose, ndi polima yogwiritsidwa ntchito mosiyanasiyana yochokera ku cellulose, chinthu chachilengedwe chomwe chimapezeka m'makoma a maselo a zomera. Zipangizo zopangidwa ndi HPMC zatchuka kwambiri m'mafakitale osiyanasiyana chifukwa cha mawonekedwe awo apadera komanso ntchito zosiyanasiyana. Chiyambi...Werengani zambiri»
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1. Chiyambi: Mu kupanga mankhwala, ma binder amagwira ntchito yofunika kwambiri pakuwonetsetsa kuti mitundu yosiyanasiyana ya ma binder ikugwira ntchito bwino. Pakati pa mitundu yosiyanasiyana ya ma binder yomwe ilipo, Hydroxypropyl Methylcellulose (HPMC) imadziwika kuti ndi njira yosinthika komanso yogwiritsidwa ntchito kwambiri. 2. Katundu wa HPMC Binder Systems...Werengani zambiri»
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Hydroxypropyl methylcellulose (HPMC) ndi polima wogwiritsidwa ntchito mosiyanasiyana womwe umagwiritsidwa ntchito kwambiri m'mafakitale osiyanasiyana, kuphatikizapo zomangamanga, mankhwala, chakudya, ndi zodzoladzola. Pa zomangamanga, HPMC imagwira ntchito yofunika kwambiri ngati chowonjezera mu zipangizo zopangidwa ndi simenti, makamaka pakukweza mphamvu zomangira. 1.Int...Werengani zambiri»
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MC ndi methyl cellulose, yomwe imapezeka pochiza thonje loyengedwa ndi alkali, pogwiritsa ntchito methyl chloride ngati chothandizira kutenthetsa, ndikupanga cellulose ether kudzera muzochita zingapo. Kawirikawiri, mlingo wa kusintha ndi 1.6 ~ 2.0, ndipo kusungunuka kumasiyananso ndi madigiri osiyanasiyana ...Werengani zambiri»
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HPMC hydroxypropyl methyl cellulose wopanga wopanga mafakitale ogulitsa kunja Kodi ntchito yaikulu ya HPMC ndi yotani? HPMC ingagawidwe m'magulu awa: kalasi yomanga, kalasi ya chakudya ndi kalasi yachipatala pogwiritsira ntchito. HPMC imagwiritsidwa ntchito kwambiri mu zipangizo zomangira, zokutira, ma resini opangidwa, ziwiya zadothi, mankhwala, chakudya, zovala...Werengani zambiri»
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Cellulose ether ndi polima yokhala ndi kapangidwe ka ether kopangidwa ndi cellulose. Mzere uliwonse wa glucosyl mu cellulose macromolecule uli ndi magulu atatu a hydroxyl, gulu loyamba la hydroxyl pa atomu yachisanu ndi chimodzi ya carbon, gulu lachiwiri la hydroxyl pa atomu yachiwiri ndi yachitatu ya carbon, ndi hydrog...Werengani zambiri»
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Cellulose ether idzawonjezera nthawi yoyika simenti kapena ukonde wa matope, idzachedwetsa kayendedwe ka madzi a simenti, zomwe zimathandiza kukonza nthawi yogwirira ntchito ya simenti, kukonza kusinthasintha ndi kugwa kwa simenti pambuyo pa kutayika, komanso zitha kuchedwetsa kupita patsogolo kwa ntchito yomanga, makamaka ...Werengani zambiri»
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Pogwiritsa ntchito matope onyowa, hydroxypropyl methylcellulose ili ndi mphamvu zabwino zokhuthala, imatha kuwonjezera kwambiri mphamvu yolumikizirana pakati pa matope onyowa ndi maziko, komanso imatha kukonza magwiridwe antchito a matope oletsa kutsika, kotero imagwiritsidwa ntchito kwambiri popaka matope, khoma lakunja ...Werengani zambiri»
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Kukhuthala kwa ether ya cellulose kumadalira: kuchuluka kwa polymerization ya ether ya cellulose, kuchuluka kwa yankho, kuchuluka kwa shear, kutentha ndi zina. Kapangidwe ka gelling ka yankho ndi kapadera kwa alkyl cellulose ndi zotumphukira zake zosinthidwa. Kapangidwe ka gelation ndi r...Werengani zambiri»
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1. Kutentha kwa madzi Malinga ndi kakulidwe ka kutentha kwa madzi pakapita nthawi, njira yothira madzi ya simenti nthawi zambiri imagawidwa m'magawo asanu, omwe ndi nthawi yoyamba ya madzi (0~15min), nthawi yoyambitsa (15min~4h), nthawi yofulumizitsa ndi kukhazikitsa (4h~8h), kuchepetsa mphamvu ...Werengani zambiri»
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Pogwiritsa ntchito zipangizo zomangira, hydroxypropyl methylcellulose ndi chowonjezera chomwe chimagwiritsidwa ntchito kwambiri pa zinthu zomangira, ndipo hydroxypropyl methylcellulose imagwiritsidwa ntchito kwambiri m'mafakitale ndipo ili ndi mitundu yosiyanasiyana. Hydroxypropyl methylcellulose ikhoza kugawidwa m'magulu awiri: mtundu wa madzi ozizira nthawi yomweyo ndi mtundu wa hot melt,...Werengani zambiri»