Ndekọ viscosity nke hydroxypropyl methylcellulose bụ ndepụta 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 dabara adaba.
Njikwa viscosity
1. Na mmepụta nke elu-viscosity hydroxypropyl methylcellulose, nanị vacuuming na nitrogen nnọchi enweghị ike imepụta nnọọ elu cellulose. N'ozuzu, a pụghị ịchịkwa mmepụta nke cellulose dị elu na China. Agbanyeghị, ọ bụrụ na enwere ike itinye mita oxygen trace na ketulu, enwere ike ịchịkwa mmepụta nke viscosity ya n'ụzọ artificial.
Ndị nnọchi anya otu na-eji
2. Tụkwasị na nke ahụ, n'ịtụle ọsọ ngbanwe nke nitrogen, ọ dị mfe ịmepụta ngwaahịa viscosity dị elu n'agbanyeghị otú 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 na njikọ hydrophobic. Enwere ndị ọrụ otu na mpaghara a na China. Kedu ụdị onye na-ahụ maka mkpakọrịta ịhọrọ nwere mmetụta dị ukwuu na arụmọrụ nke ngwaahịa ikpeazụ.
Hydroxypropyl ọdịnaya
3. Residual oxygen na reactor na-eduga ná mmebi nke cellulose na ala molekụla arọ. Otú ọ dị, ọ bụrụ na ikuku oxygen fọdụrụnụ dị ntakịrị, ọ bụrụhaala na a na-ejikọta ụmụ irighiri ihe ndị gbajiri agbaji, ọ naghị esiri ike ime nnukwu viscosity. Agbanyeghị, ọnụego saturation nwere ọtụtụ ihe jikọrọ ya 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 ọ na-ekpebikwa njigide mmiri ya, mmetụta alkalization, oke nke methyl chloride na propylene oxide, na ntinye alkali maka usoro mmeghachi omume dum. Ma oke mmiri na owu a nụchara anụcha na-ekpebi arụmọrụ nke ngwaahịa ahụ.
Oge nzipu: Eprel-03-2023