Hydroxypropylmethylcellulose (HPMC) ipolymer yakakurumbira inoshandiswa mumaindasitiri akadai semishonga, kuvaka, chikafu uye kutarisirwa kwevanhu. Iyo yakagadziridzwa fomu ye cellulose yakawanikwa nekuita methylcellulose ine propylene oxide. HPMC ichena kana isina-chena, isina kunhuwa, isingaravi hupfu, inonyungudika nyore mumvura, ethanol uye zvimwe zvinonyungudutsa zveorganic. Iri bepa rinokurukura huru tekinoroji zviratidzo zveHPMC.
viscosity
Viscosity ndiyo inonyanya kukosha tekinoroji index yeHPMC, inotaridza mafambiro ayo ekuyerera uye kushandiswa mumaindasitiri akasiyana. HPMC ine viscosity yakakwirira, zvinoreva kuti ine mukobvu, sehuchi. Iyo viscosity yeHPMC inogona kugadziridzwa nekushandura dhigirii rekutsiviwa kwemapoka ehydroxyl. Iyo yakakwirira dhigirii yekutsiva, iyo yakakwirira viscosity.
Degree rekutsiva
Iyo dhigirii yekutsiva (DS) imwe yakakosha tekinoroji chiratidzo cheHPMC, iyo inoreva huwandu hwemapoka ehydroxyl anotsiviwa nemapoka ehydroxypropyl nemapoka emethyl. Iyo DS yeHPMC inowanzosiyana kubva pa0.1 kusvika 1.7, ine DS yepamusoro inoratidza shanduko huru. Iyo DS yeHPMC inokanganisa kunyungudika kwayo, viscosity uye gel zvivakwa.
molecular uremu
Iyo molecular huremu hweHPMC zvakare yakakosha tekinoroji indekisi inobata yayo yemuviri nemakemikari zvimiro zvakaita solubility, viscosity, uye gelation. HPMC kazhinji ine huremu hwemamolecular huremu hwe10,000 kusvika 1,000,000 Daltons, ine huremu hwepamusoro hunoratidza cheni dzepolymer. Huremu hwemamorekuru hweHPMC hunokanganisa kusimba kwayo, kugona kugadzira firimu uye kugona kwemvura.
PH kukosha
Iyo pH kukosha kweHPMC yakakosha tekinoroji index inobata kunyungudika kwayo uye viscosity. HPMC inonyungudika mune acidic uye alkaline mhinduro, asi viscosity yayo yakakwira pasi pemamiriro ane acidic. Iyo pH yeHPMC inogona kugadziriswa nekuwedzera asidhi kana base. HPMC kazhinji ine pH pakati pe4 ne9.
mwando
Hunyoro hwehuwandu hweHPMC yakakosha tekinoroji indekisi inokanganisa kugadzikana kwayo kwekuchengetedza uye mashandiro ekugadzirisa. HPMC is hygroscopic, zvinoreva kuti inotora hunyoro kubva mumhepo. Hunyoro hweHPMC hunofanirwa kuchengetwa huri pasi pe7% kuti ive nechokwadi chekugadzikana uye kunaka kwayo. Yakakwira mwando yemukati inogona kutungamira kune polymer caking, clumping uye kudzikisira.
Ash content
Iyo madota emukati eHPMC yakakosha tekinoroji index inobata kuchena kwayo uye mhando. Madota zvinoreva zvisaririra zvasara mushure mekunge HPMC yapiswa. Madota eHPMC anofanirwa kunge ari pasi pe7% kuti ive nechokwadi chekuchena uye kunaka kwayo. A high ash content inogona kuratidza kuvapo kwetsvina kana kusvibiswa mu polymer.
Gelation tembiricha
Iyo tembiricha yegel yeHPMC yakakosha tekinoroji indekisi inokanganisa kuita kwayo gel. HPMC inogona gel pasi peimwe tembiricha uye mamiriro ekugadzirisa. Iyo tembiricha yegelation yeHPMC inogona kugadziridzwa nekuchinja dhigirii rekutsiva uye huremu hwemamorekuru. Tembiricha yegelling yeHPMC inowanzoita 50 kusvika 90°C.
mukupedzisa
Hydroxypropylmethylcellulose (HPMC) i polymer inoshanda yakawanda ine huwandu hwakasiyana hwezvirevo. Iyo huru yehunyanzvi zviratidzo zveHPMC zvinosanganisira viscosity, dhigirii rekutsiviwa, molecular uremu, pH kukosha, hunyoro hwemukati, madota, tembiricha yegelation, etc. Izvi zviratidzo zvehunyanzvi zvinokanganisa hunhu hwepanyama nemakemikari eHPMC uye kuona kushanda kwayo mumaindasitiri akasiyana. Nekuziva izvi zvakatemwa, tinogona kusarudza iyo chaiyo mhando yeHPMC kune yedu chaiyo application uye ive nechokwadi chemhando uye kugadzikana kwayo.
Nguva yekutumira: Sep-04-2023