Hydroxypypyl methylcellulose hpmc ndi mtundu wa osakanikirana osakaniza ether. Mosiyana ndi ionic methyl carboxymethyl cellulose yosakaniza ether, sizimagwirizana ndi zitsulo zolemera. Chifukwa cha ma ratios osiyanasiyana a methoxyl zomwe zili mu hydroxypropyl mu methylcropyl ndi ma vispooxyl omwe ali ndi methoxyl pa celyl cellose, pomwe yotsika Methoxyl zokhala ndi hydroxypyl zomwe zili pafupi ndi za hydroxypropyl methy cellose. Komabe, pakatundu uliwonse, ngakhale pang'ono kokha ka hydroxypyl.
(1) Zosintha za hydroxypypyl methylcellulose
①solublity of Hydroxypropyll methylcellulose mu madzi hydroxygyllose kusinthidwa ndi methylcellulose kusinthidwa ndi ma preylcelluse), motero akadali ndi zinthu zofanana ndi methylcellulose. Komabe, chifukwa cha gulu la hydroxypyl, kutentha kwake kwa madzi otentha ndikokwera kwambiri kuposa ma cellouse. Mwachitsanzo, mamasukidwe a hydroxypylpyl mankhwala a aquehoose Soluot ndi ma scarepropyl a mas = 0.46 ndi 500 MPEL CGE CS, pomwe Methyl cellulose pamtunda womwewo ndi pafupifupi 55 ° C. Ponena za kusungunulera kwake m'madzi, zathandizanso kwambiri. Mwachitsanzo, ma hydroxypropyll methylcellulose (granilar mawonekedwe 0.2 ~ 0,5mm pa 20% amatha kugulidwa kutentha kwa 2% amasungunuka pamadzi osazizira.
②solublity of Hydroxypropyll methylcellulose mu orthylcellulose ya hydroxygyl wa hydroxygyulose ku Oryyllulose. Pazinthu pamwamba pa 2.1, mafayilo a ma virupypropyl methylcellulose okhala ndi hydroxypropyl ms = 1.5 ~ 1,5 ~ 1,5 . Amasungunukanso mu hlornated hydrocarbons monga methylene chloride ndi chloroform, ndi okhazikika monga acetone, isoppanol ndi mowa wamaselo. Kusungunuka kwake mu ordic kumali bwino kuposa kusungunuka madzi.
. Makulidwe azomwezi zimawonjezeka ndi kuchuluka kwa ndende. Pazinthu zokhala ndi zolemera zosiyanasiyana kwa maselo omwewo, malonda omwe ali ndi kulemera kwakukulu kwa ma molecular ali ndi mamasukidwe apamwamba. Ubwenzi wake ndi kutentha kwake ndi wofanana ndi wa methyl cellulose. Kutentha kukakwera, mafayilo amayamba kuchepa, koma ikafika pamawu,
Maonekedwe ake amadzuka modzidzimutsa ndi khwalama. Kutentha kwa gel kwa gel otsika mtengo. ndizokwera. Mfundo zake za gellage sikuti zimangokhudzana ndi mawonekedwe a ether, komanso zokhudzana ndi chivindikiro cha methoxyl gulu la methoxyl gulu la hydroxypyl ndi kukula kwa digiri yokhazikika. Ziyenera kudziwika kuti hydroxpyl methylcellulose ilinso preeylclastic, ndipo yankho lake ndi lokhazikika mu kutentha kwa firiji popanda kuwonongeka kwa enzymatic.
. Mchere Geloride, Bromides, photolomide, nitrate, etc. sadzagawa mukamawonjezera yankho lake la madzi. Komabe, kuwonjezera mchere kumakhala ndi chisonkhezero kutentha kwa njira yake yothetsera magazi. Mchere ukayamba kukula, kutentha kwa gel kumatsika. Kukhazikika kwamchere kuli m'munsimu polota, mafayilo a njirayi amakula. Chifukwa chake, kuchuluka kwa mchere kumawonjezeredwa. , pakugwiritsa ntchito, imatha kukwaniritsa kukula kwachuma. Chifukwa chake, m'mabuku ena, ndibwino kugwiritsa ntchito chisakanizo cha maselo a cellulose ndi mchere kuposa kukwaniritsa ether exem kuti mukwaniritse mphamvu.
. Itha kupirira ma acid ena, monga aforac acid, acetic acid, citric acid, succinic acid, bosphoric acid, bororic acid, ndi acid. Alkalis monga caustic soda, caustic positi ndi madzi a laimu alibe mphamvu, koma amatha kuwonjezera mawonekedwe a yankho, kenako ndikuchepetsa.
. Mafuta awa a polyithylene glycol, polyvinyl acetate, polysilicone, polymethylvinoxane, hydroxyethyl cellulose, ndi methyl cellulose. Makina achilengedwe okwera zachilengedwe monga chingamu achiarabuc, dzombe la chingamu, kararaya, ndi zina zotere. Hydroxypylropyl amathanso kusakanikirana ndi mannitol ester kapena sorbitel acid, ndipo amathanso kusakanikirana ndi glycerollluropyl wapulatiyi ya celylllulose.
. A Aldeydes omwe amapanga hydroxypyl infyllulose inflydehyde, glyloxal, chidwi cha glydol wothandizira mu mafakitale. Kuchuluka kwa wothandizila mtundu wolumikizirana mu yankho ndi 0,2% ~ 10% ya unyinji wa ether, makamaka ~ 10% ~ 10% ~ 10% ~ 6% ~ 6% ya glyloxal ndiye oyenera kwambiri. Nthawi zambiri, mankhwalawa
Kutentha ndi 0 ~ 30 ℃, ndipo nthawi yake ndi 1 ~ 120min. Kulumikizana kolumikizana kumafunikira kuchitika pansi pa acidic mikhalidwe. Nthawi zambiri, yankho limayamba kuwonjezera ndi itorganic yolimba acid kapena organic carboxyylic ad kuti asinthe pafupifupi 4 ~ 6, kenako kuwonjezera Aldeydes kuti akwaniritse zomwe zikuchitika. Acid omwe amagwiritsidwa ntchito ali ndi hydrochloric acid, sulfuric acid, mafodic acid, hydroxyace acid kapena citric acid ndi oyenera. Acid ndi Aldeyde imathanso kuwonjezeredwa nthawi yomweyo kuti mulole yankho lanu lizilowetsa ndalama zomwe mungafune. Izi zimagwiritsidwa ntchito nthawi zambiri pamankhwala omaliza pokonza ma cellulose okhazikika. Pambuyo pa cellulose ether ndi insuluble, ndiyotheka kugwiritsa ntchito
20 ~ 25 ℃ madzi otsuka ndi kuyeretsa. Izi zikagwiritsidwa ntchito, zinthu zam'madzi zitha kuwonjezeredwa ku yankho la malonda kuti asinthe PH ya yankho kuti akhale alkaline, ndipo malonda adzasungunuka mu yankho mwachangu. Njirayi imagwiranso ntchito pochiza kanemayo pambuyo pa eleluluse ethel ether imapangidwa mu filimu kuti ikhale filimu yopanda insuluble.
. 1, idzawonongedwanso ndi ma enzyme, omwe amatanthauza kuti kuchuluka kwa gulu lililonse pa cellulose kuphatikizika, ndipo ma microorganisms amatha kusinthira gulu la ma anborcluse kuti mupange ma shugafamu, monga michere ya tizilombo tating'onoting'ono. Chifukwa chake, ngati digiri ya kusintha kwa ma cellulose imachuluka, kukana kwa enzymatic envositoc enzonose of cellulose ether ether. Malinga ndi malipoti, pansi pamakhalidwe oyendetsedwa, zotsatira za hydrolysis za ma enzymes a hydroxygyulose (DS =) methycellulose (DS = 2) ndi 3.8%, ndi hydroxyethyl cellulose ndi 1.7%. Itha kuwoneka kuti hydroxypropyll methylcellulose imakhala ndi luso lamphamvu la enzy. Chifukwa chake, enzyme yabwino kwambiri ya hydroxypropyl ya methylcellulose, kuphatikiza ndi kuphatikizika kwake, kuphatikizika ndi mawonekedwe a mafilimu, ndi zina, ndipo nthawi zambiri sizifunikira zoteteza. Komabe, pakusunga kwa nthawi yayitali yankho kapena zodetsedwa kuchokera kunja, zosungira zingawonjezeredwe ngati kusamala, ndipo kusankha kumatha kutsimikizika malinga ndi zofunika zomaliza za yankho. Phenylmercuric acetate ndi ma aceorvil oteteza, koma onse amakhala ndi poizoni, ayenera kulipidwa pantchito. Nthawi zambiri, 1 ~ 5mg ya phenylmecuury acetate akhoza kuwonjezeredwa pa yankho pa lita imodzi ya mlingo.
. Njira yake yothetsera vutoli kapena solc solvent yolumikizidwa imaphimbidwa pa mbale yagalasi, ndipo imakhala yopanda utoto komanso yowonekera pambuyo pouma. Ndi filimu yolimba. Ili ndi chinyontho chabwino ndipo khalani otentha kutentha kwambiri. Ngati pulogiki ya Hygroscopic imawonjezeredwa, chifukwa chake, kusinthasintha kumatha kukulimbikitsidwa. Pogwiritsa ntchito kusinthasintha, ma pulasitiki monga glycerin ndi sorbitel ndiye oyenera kwambiri. Nthawi zambiri, yankho limakhala ndi 2% ~ 3%, ndi kuchuluka kwa pulasitiki ndi 10% ~ 20% ya ethel ether. Ngati zomwe zili mupulati ya pulasitiki ndizokwera kwambiri, kudzipha kwa colloidal dehydration kumachitika pachinyontho. Mphamvu yamphamvu ya filimuyo ndi
Phukusi Ponena za hygroscopicity ya filimuyo, imawonjezeranso kuchuluka kwa pulasitiki.
Post Nthawi: Nov-24-2022