Hydroxypropyl methylcellulose (HPMC, Hydroxypropyl Methylcellulose) bụ ngwakọta polymer a na-ejikarị na nrapado, ihe ụlọ na nkwadebe ọgwụ. N'ihi nhazi kemịkalụ ya pụrụ iche na ihe onwunwe ya, a na-eji HPMC eme ihe na nrapado, ọkachasị n'ịkwalite ike nkekọ.
Chemical Njirimara na Ọdịdị nke HPMC
HPMC bụ ihe mmepụta nke cellulose, nke kpụrụ site na dochie otu hydroxyl na cellulose molecule na methoxy (-OCH3) na hydroxypropoxy (-OCH2CH (OH) CH3). Ọdịdị pụrụ iche nke HPMC na-enye ya ihe dị iche iche magburu onwe ya, dị ka mmiri solubility, thermal gelling, film-forming and thickening properties. Ngwongwo ndị a na-atọ ntọala maka iji ya mee ihe na adhesives, karịsịa na ihe owuwu na ụlọ ọrụ mmepụta ihe.
Usoro nke omume nke HPMC na adhesives
Mmetụta siri ike nke HPMC nwere mmetụta nhịahụ magburu onwe ya ma nwee ike ịbawanye viscosity nke adhesives. Na nrapado formulations, HPMC eme dị ka a thickener, na-emeziwanye rheological Njirimara nke nrapado site na-akpụ a netwọk nke ogologo yinye ụmụ irighiri na mmiri mmiri na-adọ. Mgbochi a na-enyere ihe nrapado aka ikesa karịa n'oge a na-etinye ya, na-amụba mpaghara kọntaktị n'etiti ihe ma si otú a na-eme ka ike nkekọ dịkwuo mma.
Njide mmiri HPMC nwere ikike njide mmiri dị mma, ọkachasị n'ihe eji arụ ọrụ dịka nrapado dabere na ciment, na-ejigide mmiri n'oge usoro ọgwụgwọ. Njirimara a na-eme ka a gwọọ ya n'otu n'otu ma na-ezere njikọ na-ezighi ezi ma ọ bụ enweghị ike n'ihi ụkọ mmiri ngwa ngwa. Tụkwasị na nke ahụ, ihe ndị na-ejigide mmiri nke HPMC na-agbatị oge oghere nke nrapado, na-eme ka arụ ọrụ ihe owuwu na-agbanwe agbanwe ma si otú a na-eme ka njedebe ikpeazụ dịkwuo mma.
Njirimara ndị na-emepụta ihe nkiri Ihe nkiri na-emepụta ihe nkiri nke HPMC bụkwa otu n'ime ihe ndị dị mkpa maka ịkwalite ike njikọ. HPMC nwere ike ịmepụta ihe nkiri dị egwu n'elu ihe ahụ, nke ọ bụghị nanị na-eme ka ihe ndị na-emepụta ihe na-arụ ọrụ nke nrapado, ma na-enyekwa mkpuchi mmiri na nguzogide kemịkalụ. N'ime ngwa ụfọdụ pụrụ iche, dị ka njikọ osisi ma ọ bụ gluing ngwaahịa akwụkwọ, oyi akwa ihe nkiri nchebe nke HPMC hibere nwere ike inye aka melite ike nkekọ ma gbasaa ndụ nkekọ.
HPMC emegharịrị na ihu nwere ike melite ndakọrịta ihu n'etiti nrapado na mkpụrụ. N'ihi na polar molekụla Ọdịdị nke HPMC, ọ nwere ike na-emepụta ike anụ ahụ ma ọ bụ kemịkal ike na elu nke dị iche iche ihe, karịsịa na substrates na elu polarity (dị ka iko, ceramik, ọla, wdg), HPMC nwere ike n'ụzọ dị irè melite Adhesion n'etiti nrapado. na mkpụrụ. Mgbanwe interface a dị oke mkpa iji melite ike nkekọ.
Ngwa nke HPMC na usoro nrapado dị iche iche
Adhesives dabere na mmiri Na nrapado dabere na mmiri, HPMC na-arụ ọrụ dị mkpa dị ka onye na-ebu ibu na onye na-ejigide mmiri. Isi ihe na-eme ka adhesives dabeere na mmiri bụ mmiri. Ihe eji echekwa mmiri nke HPMC nwere ike inye aka na nrapado na-agwọta nke ọma n'elu mkpụrụ osisi ahụ ma mee ka ike ejikọta ya. Tụkwasị na nke ahụ, ihe ndị na-emepụta ihe nkiri nke HPMC na-enyekwa aka na ịdịte aka nke adhesives dabeere na mmiri.
A na-eji HPMC nrapado simenti eme ihe n'ọtụtụ ebe na nrapado dabere na ciment dị ka ihe ntanye tile na ihe plasta mgbidi. Adhesives nke dabeere na ciment kwesịrị ịnọgide na-enwe ụfọdụ iru mmiri n'oge usoro ọgwụgwọ, na ezigbo njigide mmiri na-arụ ọrụ nke HPMC na-eme ka otu ciment dị n'oge usoro ọgwụgwọ ma na-ezere mgbawa ma ọ bụ ike na-ezughị ezu kpatara site na ngwa ngwa evaporation nke mmiri. Tụkwasị na nke ahụ, HPMC na-eme ka arụ ọrụ nke nrapado na-arụ ọrụ dịkwuo mma, na-eme ka owuwu dịkwuo mfe ma dị nro, na-eme ka ike nke njikọ dịkwuo mma.
Agba Latex na ihe mkpuchi ụlọ ndị ọzọ Na agba latex na ihe mkpuchi ụlọ ndị ọzọ, a na-eji HPMC eme ihe dị ka ihe na-eme ka ihe sie ike na nkwụsi ike iji meziwanye ịdị n'otu na njiri mara nke mkpuchi ahụ, na-ahụ na mkpuchi ahụ nwere ike ịrapagidesi ike na elu nke mkpụrụ, si otú a na-eme ka agba dị mma. anwụ ngwa ngwa na waterproofing Njirimara. Ihe onwunwe a dị oke mkpa maka ịdị mma na ike njikọ nke mkpuchi ụlọ.
Ihe na-emetụta arụmọrụ HPMC
Ọkwa nke nnọchi Ọkwa nnọchi nke HPMC (ya bụ, oke nke methoxy na hydroxypropoxy otu nọchiri anya na molekul) na-emetụta ọrụ ya na nrapado ozugbo. N'ikwu okwu n'ozuzu, ka ogo ngbanwe dị elu, ka njide mmiri na mmepụta ihe nkiri nke HPMC dịkwuo mma, si otú ahụ na-abawanye ike njikọ nke nrapado. Ya mere, nhọpụta ezi uche nke ogo nnọchi nke HPMC nwere ike ịkwalite arụmọrụ nke nrapado.
Arọ Molecular arọ The molekụla arọ nke HPMC nwere kpọmkwem mmetụta na ya ndim mmetụta na film-akpụ Njirimara. HPMC nwere ibu molekụla buru ibu nwere mmetụta siri ike karịa, ebe HPMC nwere ịdị arọ molekụla pere mpe na-agbaze ma dabara adaba maka iji ya na usoro nrapado chọrọ ọgwụgwọ ngwa ngwa. Ya mere, ịhọrọ HPMC nke nwere ịdị arọ molekụla kwesịrị ekwesị dị ka mkpa a kapịrị ọnụ nke nrapado si dị dị oke mkpa iji melite ike njikọ.
Ihe gbasara gburugburu ebe obibi HPMC na-egosipụta ihe dị iche iche n'okpuru ọnọdụ gburugburu ebe obibi dị iche iche. Dịka ọmụmaatụ, enwere ike imetụta ihe nrịbama na njide mmiri nke HPMC na gburugburu ebe okpomọkụ dị elu ma ọ bụ dị ala. Ya mere, a na-edozi usoro na ọnụọgụ ojiji nke HPMC maka ebe dị iche iche iji hụ na nrapado na-ejigide ike njikọ dị elu n'okpuru ọnọdụ dị iche iche.
HPMC na-arụ ọrụ dị mkpa n'ịkwalite ike nrapado. Site na usoro ya dị iche iche dị ka ịgbara mmiri, njide mmiri, nhazi ihe nkiri na mgbanwe ihu igwe, HPMC nwere ike imeziwanye arụmọrụ nke adhesives nke ọma, karịsịa n'ime mmiri na-edozi mmiri, ihe na-edozi ciment na mkpuchi ụlọ. Ka teknụzụ nrapado na-aga n'ihu na-etolite, ọrụ HPMC na-eme ka ike nkekọ ga-adịwanye mkpa.
Oge nzipu: Sep-09-2024