Hydroxypropyll methylcellulose ndi mtundu wama cellulose osakaniza ether. Mosiyana ndi ionic methyl carboxymethyl cellulose yosakaniza ether, sizimagwirizana ndi zitsulo zolemera. Chifukwa cha ma ratios osiyanasiyana a methoxyl zomwe zili mu hydroxypyllulose komanso ma virus a methoxyl, pomwe magwiridwe antchito a methoxyl omwe ali Ma hydroxypropyl ali pafupi ndi a hydroxypropyl methyl celluse. Komabe, pakatundu uliwonse, ngakhale pang'ono kokha ka hydroxypyl.
(1) Zosintha za hydroxypypyl methylcellulose
① kusungunuka kwa hydroxypropyll methylcellulose m'madzi hydroxygyulose yosinthidwa ndi methylcellulose yosinthidwa (methoxy-prosylcle) Komabe, chifukwa cha gulu la hydroxypyl, kutentha kwake kwa madzi otentha ndikokwera kwambiri kuposa ma cellouse. Mwachitsanzo, mamasukidwe a hydroxypropyl a meaquous fuluted ndi ma staxyprayl a MS = 0.46 ndi 500 MPELU ° C, pomwe pathyl cople kutentha komweko ndi 55 ° C. Ponena za kusungunulera kwake m'madzi, zathandizanso kwambiri. Mwachitsanzo, ma hydroxypropyll methylcellulose (mawonekedwe a granolar frow
② Solubility of Hydroxypropyll methylcellulose mu orthylcellulose ya hydroxygyl wa hydroxygyulose mu orthyllulose. Methylcellulose ayenera kukhala ndi diathoigent ya methoxyl ya 2.1 yomwe ili pamwambapa, koma okhala ndi hydroxypropyl ms = 1.2 ~ 1.2 ~ 1.5 ~ 1.2 ~ 1.2 ~ 1.2 ~ 1.2 thermos-piloni ndi kusungunuka madzi. 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.
. Amayeza 20 ° C ndi 2% yothetsera matenda ngati muyezo. 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 kukayamba kugwetsa, koma ikafika pa kutentha kwina, mawonekedwe awo modzidzimutsa akukwera ndipo miyala imachitika. 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 chipinda 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, kumatha kukula 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 acid acid, monga mawonekedwe a formuc acid, acetic acid, a phosphoric acid, bosphoric acid, boric 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, polymilicone, polymethylvinyl Sidoxane, 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.
. Aldeydes omwe amapanga hydroxpyl infyllulose infoleckyde, glynoxal, chidwi cha addeldehyde, etc. kupanga. Mlingo wa mtundu uwu wa wothandizirana ndi 0,2% ~ 10% ya unyinji wa ether, makamaka ~ 10% ~ Mwachitsanzo, 2% ~ 10% ~ 6% ~ 6% ~ 6% ya glyloxal ndiye oyenera kwambiri. Nthawi zambiri, kutentha kwamankhwala ndi 0 ~ 30 ~ ndipo nthawi yake ndi 1 ~ 120min. Chiwonetsero chazomwe chimayenera kuchitika pansi pa acidic mikhalidwe. Nthawi zambiri, PH ya yankho limasinthidwa kukhala pafupifupi 2 ~ 6 powonjezera inorganic mphamvu acid acid acid acid acid acid acid acid Acid omwe amagwiritsidwa ntchito ali ndi hydrochloric acid, sulfuric acid, a phosphoric acid, aceroxy-acecy-acid acid kapena acerocy-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 yopanda nzeru, 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.
. Kulowetsa gulu lirilonse pamtima pa cellulose sikufanane chokwanira, ndipo tizilombo tating'onoting'ono timatha kuzimilira gulu la anibstititititititititititititinase yopanga ma shugase kuti apange shuga, ngati 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. According to reports, under controlled conditions, the hydrolysis results of the enzymes made, the residual viscosity of hydroxypropyl methylcellulose (DS=1.9) is 13.2%, methylcellulose (DS=1.83) is 7.3%, methylcellulose (DS=1.66) is 3.8%, and hydroxyethyl cellulose is 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 ya filimuyo ndi pulasitiki yowonjezera ndi yayikulu kuposa yomwe popanda pulasikitala, ndipo imachulukitsa ndi kuchuluka kwa kuchuluka kowonjezeredwa. Ponena za hygroscopicity ya filimuyo, imawonjezeranso kuchuluka kwa pulasitiki.
Post Nthawi: Jun-13-2023