The viscosity index nkehydroxypropyl methylcellulosebụ ndeksi dị oke mkpa. Viscosity anaghị anọchi anya ịdị ọcha. The viscosity nke cellulose HPMC dabere na mmepụta usoro. Mpaghara ojiji dị iche iche kwesịrị ịhọrọ cellulose HPMC nwere viscosities dị iche iche, ọ bụghị elu viscosity nke cellulose HPMC, ka mma! Ihe ziri ezi ziri ezi √
Njikwa viscosity
1. High-viscosity hydroxypropyl methylcellulose enweghị ike ịmepụta cellulose dị elu naanị site na ikpochapu na dochie ya na nitrogen. N'ozuzu, a pụghị ịchịkwa mmepụta nke cellulose dị elu na China. Otú ọ dị, ọ bụrụ na enwere ike ịwụnye ihe na-egosi oxygen na ketulu, a pụrụ ịchịkwa mmepụta nke viscosity n'ụzọ artificial.
Ojiji nke ndị nnọchi anya
2. Tụkwasị na nke ahụ, na-atụle ngbanwe ọsọ nke nitrogen, ma n'otu oge ahụ, ọ dị nnọọ mfe ịmepụta ngwaahịa viscosity dị elu n'agbanyeghị otú ikuku ikuku si dị. N'ezie, ogo polymerization nke owu a nụchara anụcha dịkwa oke mkpa. Ọ bụrụ na nke ahụ anaghị arụ ọrụ, mee ya site na njikọ hydrophobic. Enwere ndị nnọchi anya ụlọ na nke a. Kedu ụdị onye na-akpakọrịta ihe a na-ahọrọ nwere mmetụta dị ukwuu na arụmọrụ nke ngwaahịa ikpeazụ.
Hydroxypropyl ọdịnaya
3. The fọdụrụ oxygen na reactor na-eduga ná mmebi nke cellulose na mbelata nke molekụla arọ, ma fọdụrụ oxygen bụ nanị. Ọ naghị esiri ike ime ka viscosity dị elu ma ọ bụrụhaala na molecule ndị gbajiri agbaji na-ejikọtaghachi. Agbanyeghị, ọnụego saturation mmiri nwekwara njikọ chiri anya na ọdịnaya nke hydroxypropyl. Ụfọdụ ụlọ ọrụ na-achọ naanị ibelata ọnụ ahịa na ọnụahịa, ma ha adịghị njikere ịbawanye ọdịnaya nke hydroxypropyl, ya mere àgwà enweghị ike iru ọkwa nke ngwaahịa mba ọzọ yiri ya.
ihe ndị ọzọ
4. Ọnụego njide mmiri nke ngwaahịa ahụ nwere mmekọrịta dị ukwuu na hydroxypropyl, ma maka usoro mmeghachi omume dum, ọ na-ekpebikwa njigide mmiri ya, mmetụta nke alkalization, oke nke methyl chloride na propylene oxide, na ntinye nke alkali. . Na oke mmiri na owu a nụchara anụcha na-ekpebi arụmọrụ nke ngwaahịa ahụ.
Oge nzipu: Ọktoba 19-2022