Ndekọ viscosity nke hydroxypropyl methylcellulose bụ ihe dị oke mkpa. viscosity anaghị anọchite anya ịdị ọcha. viscosity nke cellulose HPMC dabere na usoro mmepụta. Gburugburu ojiji dị iche iche kwesịrị ịhọrọ cellulose HPMC nwere viscosities dị iche iche, ọ bụghị ka viscosity nke cellulose HPMC dị elu, ka mma! Ihe ziri ezi bụ ihe ziri ezi!
1. Njikwa viscosity
Hydroxypropyl methylcellulose nke nwere oke viscosity enweghị ike imepụta cellulose dị elu naanị site na iji vacuum na nnọchi nitrogen na mmepụta. N'ozuzu, enweghị ike ijikwa mmepụta nke cellulose dị elu na China. Agbanyeghị, ọ bụrụ na enwere ike itinye mita oxygen dị nso na ketulu ahụ, enwere ike ijikwa mmepụta nke viscosity ya site na aka.
2. Ojiji nke onye nnọchi anya njikọ
Tinyere nke a, n'ịtụle ọsọ nke nitrogen gbanwere, ọ dị mfe imepụta ngwaahịa ndị na-agbawa agbawa n'agbanyeghị otú sistemụ ahụ si ghara ikuku. N'ezie, oke nke polymerization nke owu a nụchara anụcha dịkwa oke mkpa. Ọ bụrụ na nke ahụ anaghị arụ ọrụ, mee ya na njikọ hydrophobic. E nwere ndị nnọchi anya njikọ na mpaghara a na China. Ụdị onye nnọchi anya njikọ ị ga-ahọrọ nwere nnukwu mmetụta na arụmọrụ nke ngwaahịa ikpeazụ.
3. Ọdịnaya Hydroxypropyl
Oxygen fọdụrụ n'ime ihe na-emepụta ihe na-akpata mmebi nke cellulose na mbelata nke ibu molekul, mana oxygen fọdụrụ nwere oke, ma ọ bụrụhaala na molekul ndị gbawara agbawa ejikọtaghachiri, ọ naghị esiri ike ime ka viscosity dị elu. Agbanyeghị, ọnụego saturation nwere ọtụtụ ihe jikọrọ ya na ọdịnaya nke hydroxypropyl. Ụfọdụ ụlọ ọrụ na-achọ naanị ibelata ọnụ ahịa na ọnụ ahịa, mana ha achọghị ịbawanye ọdịnaya nke hydroxypropyl, yabụ àgwà ahụ enweghị ike iru ọkwa nke ngwaahịa mba ọzọ yiri ya.
4. Ihe ndị ọzọ
Ọnụego nchekwa mmiri nke ngwaahịa a nwere mmekọrịta dị mma na hydroxypropyl, mana maka usoro mmeghachi omume niile, ọ na-ekpebikwa ọnụego nchekwa mmiri ya, mmetụta alkalization, oke nke methyl chloride na propylene oxide, mkpokọta alkali na njigide mmiri. Oke ya na owu a nụchara anụcha na-ekpebi arụmọrụ nke ngwaahịa ahụ.
Oge ozi: Eprel-04-2023