Hydroxypropyl methyl cellulose VS methyl cellulose

1. Hydroxypropyl methyl cellulosetiotuka ninu omi tutu, omi gbona tituka yoo pade awọn iṣoro. Ṣugbọn iwọn otutu gelation rẹ ninu omi gbona jẹ pataki ti o ga ju ti methyl cellulose lọ. Solubility ti methyl cellulose ninu omi tutu tun ni ilọsiwaju pupọ.

2. Irisi ti hydroxypropyl methyl cellulose jẹ ibatan si iwuwo molikula rẹ, ati iwuwo molikula nla ni iki ti o ga julọ. Iwọn otutu yoo tun ni ipa lori iki rẹ, iwọn otutu pọ si, iki dinku. Sibẹsibẹ, iki ti iwọn otutu giga jẹ kekere ju ti methyl cellulose lọ. Ojutu naa jẹ iduroṣinṣin nigbati o fipamọ ni iwọn otutu yara.

3. Hydroxypropyl methyl cellulose jẹ iduroṣinṣin si acid ati alkali, ati pe ojutu olomi rẹ jẹ iduroṣinṣin pupọ ni ibiti pH = 2 ~ 12. Omi onisuga caustic ati omi orombo wewe ko ni ipa nla lori awọn ohun-ini rẹ, ṣugbọn alkali le mu iwọn itusilẹ rẹ pọ si ki o mu iki ti pin dara sii. Hydroxypropyl methyl cellulose ni iduroṣinṣin si awọn iyọ gbogbogbo, ṣugbọn nigbati ifọkansi ti ojutu iyọ ba ga, iki ti hydroxypropyl methyl cellulose ojutu duro lati pọ si.

4. Idaduro omi ti hydroxypropyl methyl cellulose da lori iye afikun rẹ, viscosity, bbl Iwọn idaduro omi ti o wa labẹ iye afikun ti o ga ju ti methyl cellulose lọ.

5. Adhesiveness ti hydroxypropyl methyl cellulose si amọ ikole jẹ ti o ga ju ti methyl cellulose.

6. Hydroxypropyl methyl celluloseni resistance henensiamu ti o dara ju methyl cellulose, ati pe o ṣeeṣe ti ibajẹ enzymatic ni ojutu jẹ kekere ju cellulose methyl.