Katundu wakuthupi ndi ntchito zazikulu za zothandizira kukonza PVC

Chithandizo chothandizira kukonza PVC ndi polymer ya thermoplastic graft yomwe imapezeka kuchokera ku polymerization ya methyl methacrylate ndi acrylate kudzera mu lotion ya mbewu. Imagwiritsidwa ntchito kwambiri pokonza ndi kupanga zinthu za PVC. Imakhala ndi zotsatira zabwino pakukweza kukana kwa mphamvu ya zinthu za PVC. Imatha kukonza njira ya polymerization ya magawo ambiri pogwiritsa ntchito polymerization ya lotion ya mbewu, kuphatikiza polymerization yachikhalidwe ya lotion ndi polymerization ya lotion ya core shell shell. Ubwino wake uli mukutha kuwongolera kapangidwe kake, kukula, makulidwe a chipolopolo, chiŵerengero cha chipolopolo ndi radius ya core, mawonekedwe a ntchito pamwamba, ndi zina zotero za tinthu malinga ndi zosowa zosiyanasiyana panthawi ya synthesis reaction, ndipo kufalikira kwa tinthu komwe kumachitika kumakhala kofanana.

Zipangizo zazikulu zothandizira kukonza PVC ndi ma ester a acrylic ndi methyl methacrylate. Pakupanga kwenikweni, acrylate nthawi zambiri imayamba kupangidwa ndi ma monomers ena (monga styrene, acrylonitrile, ndi zina zotero) kudzera mu lotion kuti ipange polima yokhala ndi kutentha kochepa kwa kusintha kwa galasi, ndiko kuti, pakati yokhala ndi elastomer properties, kenako imapangidwa ndi methyl methacrylate, styrene, ndi zina zotero kuti ipange polima yokhala ndi kapangidwe ka chipolopolo chapakati. Kuchuluka kolimba kwa lotion iyi yopangidwa ndi polymer nthawi zambiri kumakhala pafupifupi 45% ± 3%, ndipo lotion imauma ndikuuma kuti madzi a chinthucho asapitirire 1% (mass fraction) kuti mupeze ufa woyera.

Kupoletsa kwa lotion ya core shell ndiye maziko a ukadaulo wopanga utomoni wa ACR. Kapangidwe ka chipolopolo cha core cha ACR kangagawidwe m'mitundu itatu: kapangidwe ka chipolopolo chofewa cha core core, kapangidwe ka chipolopolo chofewa cha core core, ndi kapangidwe ka chipolopolo chofewa cha hard-layer katatu. Komabe, mtundu waukulu womwe ukugulitsidwa pamsika pano ndi "kapangidwe ka chipolopolo chofewa cha core core". Ma resin a ACR okhala ndi kapangidwe kameneka ali ndi magwiridwe antchito abwino ndipo amagwiritsidwa ntchito kwambiri. Kupoletsa kwa lotion ya core shell ya "kapangidwe ka chipolopolo chofewa cha core core" ndi njira yomwe monomer yolimba imalumikizidwa pa mbewu ya tinthu tating'onoting'ono ta latex tomwe timapangidwa ndi sitepe yoyamba ya polymerization ya lotion. Mtundu ndi mlingo wa emulsifiers, chiŵerengero cha core-shell, njira yodyetsera monomer ya shell, digiri yolumikizira ya tinthu ta latex ya mbewu (rabala core), kukula kwa tinthu ta mbewu, ndi mtundu ndi mlingo wa crosslinking agent zonse zimakhudza kwambiri kapangidwe ka chipolopolo cha core-shell cha tinthu ta latex ya ACR ndi magwiridwe antchito omaliza a ACR.