Hydroxypropyl methylcellulose (HPMC) ni amazi ashonga polymer ibikoresho bikoreshwa cyane mubuvuzi, ibiryo, ubwubatsi nizindi nzego. Ifite ubushyuhe bwiza, ariko irashobora kwangirika munsi yubushyuhe bwinshi. Ubushyuhe bwo kwangirika bwa HPMC bwibasiwe cyane cyane nuburyo bwimiterere ya molekile, ibidukikije (nkubushuhe, agaciro ka pH) nigihe cyo gushyuha.
Ubushyuhe bwo kugabanuka bwa HPMC
Kwangirika k'ubushyuhe bwa HPMC mubisanzwe bitangira kugaragara hejuru ya 200℃, kandi kubora kugaragara bizaba hagati ya 250℃-300℃. By'umwihariko:
Munsi ya 100℃: HPMC yerekana cyane cyane guhumeka kwamazi nimpinduka mumiterere yumubiri, kandi nta kwangirika bibaho.
100℃-200℃: HPMC irashobora gutera okiside igice bitewe nubushyuhe bwaho, ariko irahagaze muri rusange.
200℃-250℃: HPMC yerekana buhoro buhoro iyangirika ryubushyuhe, bugaragarira cyane cyane nko kuvunika kwimiterere no kurekura ibinyabuzima bito bito.
250℃-300℃.
Hejuru ya 300℃: HPMC itesha agaciro vuba na karubone, kandi ibintu bimwe na bimwe bidahinduka bikomeza kurangira.
Ibintu bigira ingaruka mbi kuri HPMC
Uburemere bwa molekuline n'urwego rwo gusimburwa
Iyo uburemere bwa molekuline ya HPMC ari nini, ubusanzwe ubushyuhe bwabwo buri hejuru.
Urwego rwo gusimbuza imikorerexy na hydroxypropoxy matsinda bizagira ingaruka kumyuka yubushyuhe. HPMC ifite urwego rwo hejuru rwo gusimburwa biroroshye kwangirika kubushyuhe bwinshi.
Ibidukikije
Ubushuhe: HPMC ifite hygroscopique ikomeye, kandi ubuhehere bushobora kwihuta kwangirika kwayo mubushyuhe bwinshi.
agaciro ka pH: HPMC irashobora kwibasirwa na hydrolysis no kwangirika mugihe acide ikomeye cyangwa alkali.
Igihe cyo gushyuha
Gushyushya 250℃mugihe gito ntigishobora kubora rwose, mugihe gukomeza ubushyuhe bwo hejuru igihe kirekire bizihutisha inzira yo kwangirika.
Ibicuruzwa bitesha agaciro HPMC
HPMC ikomoka ahanini kuri selile, kandi ibicuruzwa byayo bitesha agaciro bisa na selile. Mugihe cyo gushyushya, ibi birashobora kurekurwa:
Umwuka wamazi (uva mumatsinda ya hydroxyl)
Methanol, Ethanol (biva mumikorere ya hydroxypropoxy)
Acide acike (ivuye mubicuruzwa byangirika)
Umwuka wa karubone (CO, CO₂, byakozwe no gutwika ibintu kama)
Umubare muto wa kokiya
Koresha ubushyuhe bwa HPMC
Nubwo HPMC izagenda igabanuka buhoro buhoro hejuru ya 200℃, mubisanzwe ntabwo ihura nubushyuhe bwo hejuru mubikorwa bifatika. Urugero:
Uruganda rwa farumasi: HPMC ikoreshwa cyane cyane mugukoresha ibinini bya tableti hamwe nubushakashatsi burambye-busanzwe, bukoreshwa kuri 60℃-80℃, ikaba iri munsi yubushyuhe bwayo.
Inganda zibiribwa: HPMC irashobora gukoreshwa nkibyimbye cyangwa emulisiferi, kandi ubusanzwe ubushyuhe bwo gukoresha ntiburenze 100℃.
Inganda zubaka: HPMC ikoreshwa nka sima na minisiteri, kandi ubushyuhe bwubwubatsi muri rusange ntiburenga 80℃, kandi nta gutesha agaciro bizabaho.
HPMC itangira kumanuka hejuru ya 200℃, ibora cyane hagati ya 250℃-300℃, na karubone byihuse hejuru ya 300℃. Mubikorwa bifatika, igihe kirekire guhura nubushyuhe bwo hejuru bigomba kwirindwa kugirango bikomeze imikorere ihamye.
Igihe cyo kohereza: Apr-03-2025