Usoro mmepụta PVA na ngwa ngwa

Polyvinyl Alcohol (PVA) bụ polymer sịntetik emepụtara site na polymerization nke vinyl acetate na-esote hydrolysis. Nke a bụ nkọwapụta nke usoro mmepụta PVA na ngwa ya sara mbara:

Usoro mmepụta:

1. Polymerization nke Vinyl Acetate:
   • Vinyl acetate monomers na-polymerized site na iji ihe mmalite nke free-radical na ọnụnọ nke ihe mgbaze ma ọ bụ dị ka emulsion. Nzọụkwụ a na-eme ka e guzobe polyvinyl acetate (PVAc), polymer na-acha ọcha, na-edozi mmiri.
2. Hydrolysis nke polyvinyl acetate:
   • A na-eme ka polymer PVAc hydrolyzed site n'ịgwọ ya na ngwọta alkaline (dị ka sodium hydroxide) n'okpuru ọnọdụ a na-achịkwa. Mmeghachi omume hydrolysis a na-ekewa ndị otu acetate site na ọkpụkpụ azụ polymer, na-eme ka e nwee mmanya polyvinyl (PVA).
3. Nsacha na ihicha:
   • Ngwọta PVA na-enweta usoro dị ọcha iji wepụ adịghị ọcha na monomers na-emeghị eme. A na-akpọzi ihe ngwọta PVA dị ọcha iji nweta ma ọ bụ ntụ ntụ PVA siri ike.
4. Nhazi ọzọ:
   • Enwere ike ịhazi flakes PVA ma ọ bụ ntụ ntụ n'ụdị dị iche iche dị ka granules, pellets, ma ọ bụ ngwọta, dabere na ngwa a chọrọ.

Ngwa sara mbara:

1. Adhesives na ihe nkedo:
   • A na-ejikarị PVA eme ihe dị ka ihe nkedo na nrapado, gụnyere osisi gluu, gluu akwụkwọ, na akwa akwa. Ọ na-enye adhesion siri ike na ihe dị iche iche ma na-enye ihe ndị na-emepụta ihe nkiri mara mma.
2. Textiles na Fibers:
   • A na-eji eriri PVA eme ihe na ngwa akwa dị ka ịkwa akwa, ịkwa akwa, na akwa anaghị akwa. Ha na-egosiputa ihe ndị dị ka ike tensile dị elu, nkwụsi ike abrasion na nkwụsi ike kemịkal.
3. Mkpuchi na nha akwụkwọ:
   • A na-eji PVA eme ihe na mkpuchi akwụkwọ na nhazi nha iji meziwanye ire ụtọ elu, ibipụta, na ntinye ink. Ọ na-eme ka ike na ịdịte aka nke ngwaahịa akwụkwọ.
4. Ihe eji ewu ụlọ:
   • A na-eji ihe ndị dabeere na PVA eme ihe na ihe owuwu dị ka ihe mgbakwunye ngwa agha, ihe mkpuchi tile, na mkpuchi cimenti. Ha na-eme ka arụ ọrụ, nrapanye, na ịdịte aka nke ngwaahịa ihe owuwu.
5. Ihe nkiri nkwakọ ngwaahịa:
   • A na-eji ihe nkiri PVA eme ihe maka ngwa nkwakọba ihe n'ihi ihe mgbochi ha dị mma, nkwụsị mmiri, na biodegradaability. A na-eji ha na nkwakọ ngwaahịa nri, ihe nkiri ọrụ ugbo, na ngwa nkwakọ ngwaahịa pụrụ iche.
6. Ngwa ịchọ mma na ngwaahịa nlekọta onwe onye:
   • A na-eji PVA eme ihe ịchọ mma na ngwaahịa nlekọta onwe onye dị ka gels na-edozi ntutu isi, ude, na lotions. Ọ na-enye ihe ndị na-emepụta ihe nkiri, ihe na-eme ka ọ dị arọ, na-eme ka ahụ sie ike.
7. Ngwa ọgwụ na ọgwụ:
   • A na-eji PVA eme ihe na ọgwụ na ọgwụ ndị dị ka usoro nnyefe ọgwụ, akwa ọnya, na mkpuchi lens kọntaktị. Ọ bụ ihe dakọtara na ya, anaghị egbu egbu, ma na-egosipụta oke mmiri solubility.
8. Ụlọ ọrụ nri:
   • A na-eji PVA mee ihe dị ka ihe mgbakwunye nri na ngwa dị iche iche dị ka ihe nkiri a na-eri nri, mkpuchi nke ekpomeekpo ma ọ bụ nri na-edozi ahụ, yana dịka ihe na-eme ka ọ dị arọ na ngwaahịa nri. A na-ewere ya dị mma maka oriri mmadụ.

Na nchịkọta, Polyvinyl Alcohol (PVA) bụ polymer nwere ọtụtụ ngwa n'ofe ụlọ ọrụ dị ka adhesives, textiles, paper, construction, packing, cosmetics, medical, pharmaceutical, and food. Ngwongwo ya pụrụ iche na-eme ka ọ dị mma maka ngwa dị iche iche na-achọ ịmepụta ihe nkiri, nrapado, njide, ihe mgbochi, na mmiri-soluble Njirimara.