Zomwe Zimakhudza Kupanga kwa Hydroxypropyl Methyl Cellulose Viscosity!

Mndandanda wa viscosity index wa hydroxypropyl methylcellulose ndiwofunikira kwambiri. Kukhuthala sikuyimira chiyero. Kukhuthala kwa cellulose HPMC kumatengera kupanga. Zosiyanasiyana ntchito mapangidwe ayenera kusankha mapadi HPMC ndi viscosities osiyana, osati apamwamba mamasukidwe akayendedwe a mapadi HPMC, bwino! Cholondola ndi cholondola!

1. Viscosity control

High-viscosity hydroxypropyl methylcellulose sangatulutse mapadi okwera kwambiri pokhapokha pakupukuta ndikusintha nayitrogeni popanga. Nthawi zambiri, kupanga ma cellulose apamwamba kwambiri ku China sikungawongoleredwe. Komabe, ngati mita ya okosijeni imatha kuyikidwa mu ketulo, kupanga mamasukidwe ake kutha kuwongoleredwa mwachinyengo.

2. Kugwiritsa ntchito wothandizirana

Kuonjezera apo, poganizira kuthamanga kwa nayitrogeni m'malo mwake, ndikosavuta kupanga zinthu zowoneka bwino mosasamala kanthu kuti makinawo ali ndi mpweya wotani. Zachidziwikire, kuchuluka kwa ma polymerization a thonje woyengedwa ndikofunikiranso. Ngati izi sizikugwira ntchito, chitani ndi hydrophobic association. Pali othandizira othandizira mderali ku China. Ndi mtundu wanji wa othandizira omwe angasankhe ali ndi chikoka chachikulu pakuchita kwa chinthu chomaliza.

3. Hydroxypropyl zili

Mpweya wotsalira wa okosijeni mu riyakitala umayambitsa kuwonongeka kwa cellulose ndi kuchepa kwa kulemera kwa maselo, koma mpweya wotsalirawo ndi wochepa, malinga ngati mamolekyu osweka akugwirizanitsanso, sizovuta kupanga kukhuthala kwakukulu. Komabe, kuchuluka kwa machulukidwe kumakhudzana kwambiri ndi zomwe zili mu hydroxypropyl. Mafakitale ena amangofuna kuchepetsa mtengo ndi mtengo, koma sakufuna kuwonjezera zomwe zili mu hydroxypropyl, kotero kuti khalidweli silingathe kufika pamlingo wazinthu zakunja zofanana.

4. Zinthu zina

Mlingo wosungira madzi wa mankhwalawa uli ndi ubale wabwino kwambiri ndi hydroxypropyl, koma panjira yonseyi, imatsimikiziranso kuchuluka kwa kusungirako madzi, zotsatira za alkalization, chiŵerengero cha methyl chloride ndi propylene oxide, ndende ya alkali ndi kusunga madzi. Chiŵerengero cha thonje woyengedwa chimatsimikizira ntchito ya mankhwala.