I-VAE (iAcetate yeVinyl)

I-Vinyl acetate (VAE), ikhemikhali eyaziwa ngokuba yi-CH3COOCH=CH2, i-monomer ephambili esetyenziselwa ukuveliswa kweepolymers ezahlukeneyo, ngakumbi i-vinyl acetate-ethylene (VAE) copolymers. Nantsi isishwankathelo se-vinyl acetate kunye nokubaluleka kwayo:

1. IMonomer kwiMveliso yePolymer:

• IVinyl acetate lulwelo olungenambala nevumba elirhabaxa. Yi-monomer ephambili esetyenziswa ekudibaneni kweepolymers ezahlukeneyo, kubandakanya i-polyvinyl acetate (PVA), i-vinyl acetate-ethylene (VAE) copolymers, kunye ne-vinyl acetate-vinyl versatate (VAV) copolymers.

2. IVinyl Acetate-Ethylene (VAE) IiCopolymers:

• I-VAE copolymers iveliswa nge-copolymerizing vinyl acetate ene-ethylene phambi kwe-polymerization initiator kunye nezinye izongezo. Ezi copolymers zibonisa ukuguquguquka okuphuculweyo, ukunamathela, kunye nokumelana namanzi xa kuthelekiswa ne-acetate ye-polyvinyl ecocekileyo.

3. Usetyenziso:

• Iicopolymers ze-VAE zifumana ukusetyenziswa kakhulu kumashishini ahlukeneyo, kubandakanywa izinto zokuncamathelisa, iingubo, iipeyinti, izinto zokwakha, iingubo kunye neengubo zephepha.
• Kwizicelo zokubambelela, ii-copolymers ze-VAE zibonelela ngokugqwesa ngokugqwesileyo kuluhlu olubanzi lwee-substrates, ezenza zilungele ukusetyenziswa kwi-adhesives yomthi, i-adhesives yephepha, kunye ne-adhesive-sensitive adhesives.
• Kwiingubo kunye neepeyinti, i-VAE copolymers isebenza njengezibophelelo, ibonelela ngeepropati zokwenza ifilimu, ukuqina, kunye nokuchasana kwamanzi. Zisetyenziswa kwiingubo zokwakha, iipeyinti zokuhombisa, kunye neengubo zemizi-mveliso.
• Kwizinto zokwakha, i-VAE copolymers isetyenziswa njengezongezo kumdaka, i-tile adhesives, i-grouts, kunye ne-sealants ukuphucula ukubambelela, ukuguquguquka, kunye nokuchasana kwamanzi.

4. Izinto eziluncedo:

• I-VAE copolymers ibonelela ngeenzuzo ezininzi ngaphezulu kweepolima zemveli, kubandakanya ubutyhefu obuphantsi, ivumba eliphantsi, ukuncamathela okulungileyo, ukuguquguquka, kunye nokuxhathisa amanzi.
• Zinobuhlobo nokusingqongileyo kwaye zithobela imigaqo eyahlukeneyo malunga neekhompawundi ze-volatile organic (VOCs) kunye nezinto eziyingozi.

5. Imveliso:

• I-acetate ye-vinyl iveliswa ngokuyinhloko ngokuphendula kwe-acetic acid kunye ne-ethylene phambi kwe-catalyst, ngokuqhelekileyo i-palladium okanye i-rhodium complex. Inkqubo ibandakanya amanyathelo amaninzi, kuquka i-carbonylation ye-methanol ukuvelisa i-acetic acid, ilandelwa yi-esterification ye-acetic acid kunye ne-ethylene ukuvelisa i-vinyl acetate.

Isishwankathelo, i-vinyl acetate (i-VAE) yi-monomer eguquguqukayo esetyenziselwa ukuveliswa kwee-copolymers ze-VAE, ezifumana izicelo ezibanzi kwi-adhesives, i-coatings, iipeyinti kunye nezinto zokwakha. Iimpawu zayo ezikhethekileyo kunye nendalo ehambelana nokusingqongileyo yenza ukuba ibe yinto ebalulekileyo kwiindlela ezahlukeneyo zemizi-mveliso.