HydroxyPropyl Methylcellse (HPMC)ni ugukemura amazi ya polymer ikoreshwa cyane mubwubatsi, ubuvuzi, ibiryo n'imiti. Nubuhanga butari uonic ether bwabonye kubihindura imiti ya selile karemano, hamwe nubwinshi, kwiyongera, guhobera, imitungo yo gukora film na film. Ariko, munsi yubushyuhe bwinshi, HPMC izatesha agaciro ubushyuhe, bufite ingaruka zingenzi kumutekano no gukora muburyo bufatika.
Inzira yo gutesha agaciro ya HPMC
Gutesha agaciro hpmc ahanini bikubiyemo impinduka zumubiri nubupfumu. Impinduka zumubiri zigaragarira cyane nkuko amazi yinzibacyuho, kugabanya ibirahure, mugihe impinduka zimiti zirimo gusenya imiterere ya molekeri, itsinda ryibikorwa byitsinda ryamatsinda rya Cleavage na karubone yanyuma.
1. Icyiciro cyo hasi (100-200 ° C): guhumeka amazi no kubora kwambere
Munsi yubushyuhe buke (hafi 100 ° C), HPMC ahanini ihura na HPMC ahanini ihumeka amazi ninzibacyuho. Kubera ko HPMC ikubiyemo umubare runaka wamazi yigihugu, aya mazi azagenda ahunga buhoro buhoro mugihe cyo gushyushya, bityo bikagira ingaruka kumiterere ya motelelogiya. Byongeye kandi, viscosiya ya HPMC nayo izagabanuka no kwiyongera k'ubushyuhe. Impinduka muriki cyiciro ni impinduka cyane mumitungo yumubiri, mugihe imiterere yimiti ikomeza kuba idahindutse.
Iyo ubushyuhe bukomeje kuzamuka kugeza 150-200 ° C, HPMC itangira kunyuramo imiti isobanura imiti ibanziriza. Igaragara cyane cyane mugukuraho hydroxyProppepropy na gahunda imikorere yimikorere, bikaviramo kugabanuka muburemere bwa molecular hamwe nibihinduka. Kuri iki cyiciro, HPMC irashobora gutanga amafaranga make ya molekile ntoya ihindagurika, nka methanol na proinyeldehyde.
2. Icyiciro cyo hagati (200-300 ° C): Gutesha uruniko nyamukuru na molekile ntoya
Iyo ubushyuhe bwongerewe muri 200-300 ° C, igipimo cyangiritse cya HPMC cyihuse cyane. Uburyo bushingiye ku gutegura imigambi burimo:
Ether Bond Gutandukana: Urunigi nyamukuru rwa HPMC ruhujwe nibice bya glucose, hamwe na ether ubumwe muri bwo bumeneka buhoro buhoro munsi yubushyuhe bwo hejuru, bigatuma urunigi rwa polymer rwo kubora.
Umwubatsi reaction: Imiterere y'Isukari ya HPMC irashobora kunyura mu butaha ku bushyuhe bwo hejuru kugirango ikore hagati, bikaba byangirika mu bicuruzwa bihindagurika.
Kurekura ijisho rito rya molecule: Muri iki cyiciro, HPMC irekura Co,, H₂MC na Molekile Ntoya, nka formaldehyde, Acetaldehyde, Acroleyine.
Izi mpinduka zizatera uburemere bwa moleki za HPMC guta cyane, viscosity kugabanuka cyane, kandi ibikoresho bizatangira guhindura umuhondo ndetse no kubyara.
3. Icyiciro cy'ubushyuhe bwo hejuru (300-500 ° C): Karubonisation na Couking
Iyo ubushyuhe buzamutse hejuru ya 300 ° C, HPMC yinjira murwego rwo gutesha agaciro. Muri iki gihe, ibicana byuruhererekane nyamukuru hamwe nigihe cyo gukoraho molekile kito kiganisha ku kurimbura byuzuye imiterere yibikoresho, hanyuma ukore ibisigazwa bya karubone (Coke). Ibikurikira bikurikira bibaho cyane muriki cyiciro:
Kwangiza ibyangiritse: Kubushyuhe Bwinshi, HPMC ituruka kuri okiside ya okiside kugirango itange co₂ na co, kandi icyarimwe igisigara cya karubone.
Guhangana reaction: Igice cyurwego rwa polymer cyahinduwe nibicuruzwa bituzuye byo gutwika, nka karubone cyangwa ibisigazwa bya karubone cyangwa coke.
Ibicuruzwa bihindagurika: Komeza urekure hydrocarbone nka Ethylene, propaylene, na metani.
Iyo gushyuha mu kirere, HPMC irashobora gukomeza gushya, mugihe ashyushya ogisijeni ahanini igira igisigara cya karubone.
Ibintu bigira ingaruka kumiti ya HPMC
Gutesha agaciro HPMS bigira ingaruka kubintu byinshi, harimo:
Imiterere yimiti: Urwego rwo gusimbuza HydroxyPropyl na Methoxy muri HPMC bigira ingaruka kumutekano wacyo. Muri rusange, HPMC ifite hydroxy odlexypropyle ifite umutekano mwiza.
Ikirere kidukikije: Mu kirere, HPMC ikunda kwangirika kwa okiildative, mugihe kiri muri gaze ya inert (nka azote), igipimo cyacyo cyangiza cyane kiratinda.
Igipimo cyo gushyushya: gushyushya vuba vuba, mugihe ubushyuhe butinze bushobora gufasha HPMC kugenda buhoro buhoro kandi bigabanye umusaruro wibicuruzwa bihindagurika bya gase.
Ubushuhe: HPMC ikubiyemo umubare runaka wamazi. Mugihe cyo gushyushya, guhumeka bizagira ingaruka ku bushyuhe bwinzibacyuho no gutesha agaciro.
Ingaruka zifatika zo gutesha agaciro HPMC
Ibiranga ubushyuhe bwa HPMC bifite akamaro gakomeye mumirima ya porogaramu. Kurugero:
Inganda zubwubatsi: HPMC ikoreshwa muri sima y'ibicuruzwa bya pertar na gypsum, kandi umutekano wacyo mugihe cyo kubaka ubushyuhe bwinshi bigomba gufatwa nkirinda gutesha agaciro bigira ingaruka kumikorere ihuza.
Inganda za farumasi: HPMC ni umukozi ushinzwe kurekura ibiyobyabwenge, kandi kubora bigomba kwirindwa mugihe cyo gutanga ubushyuhe bwinshi kugirango ibiyobyabwenge bihamye.
Inganda zibiribwa: HPMC ni ibiryo byongeweho, kandi ibiranga ubushyuhe bwaho byerekana ko byakoreshwa mubushyuhe bwo hejuru bwo guteka no gutunganya.
Inzira yo gutesha agaciro yaHpmcIrashobora kugabanywa mumazi no kwangirika kwabanjirije ubushyuhe buke, urunigi rwibanze rwamasombe mato muburyo buciriritse, hamwe na karubone no guswera hejuru yubushyuhe bwinshi. Umutekano wacyo utisuye bigira ingaruka kubintu nkibi imiterere yimiti, ikirere cyinshi, gushyushya. Gusobanukirwa uburyo bwo gushushanya ubushyuhe bwa HPMC ifite agaciro gakomeye kugirango ategure gusaba no kunoza umutekano.
Igihe cya nyuma: Werurwe-28-2025