Hanyar samarwa
Hanyar 1: Hanyar Hydrolysis
Theacrylamideda aka samu ta hanyar hydrolysis yana da rarraba sarƙoƙin acrylamide mara daidaituwa akan sarƙoƙi na macromolecular. Kashi na molaracrylamidesarƙoƙi akan sarƙoƙi na macromolecular shine matakin hydrolysis.
Idan aka kwatanta da hanyar copolymerization, da ruwa-soluble anti-dandruff factor (HD) na kayayyakin da aka shirya ta general hydrolysis Hanyar ba high, kasa da 30%. A ka'ida, samfuran tare da HD fiye da 70% yakamata a shirya su ta hanyar copolymerization, wanda ke da wasu buƙatu akan yanayin zafin hydrolysis da abubuwan da suka faru, kuma yana da haɗari ga lalatawar macromolecular yayin aikin hydrolysis.
Hanyar 2: Polymerization na maganin ruwa
Aqueous bayani polymerization polymerization a cikin abin da dauki monomer da initiator suna narkar da cikin ruwa. Wannan hanya mai sauƙi ce, ƙarancin gurɓataccen muhalli, yawan amfanin ƙasa na polymer, mai sauƙin samun babban nau'in nau'in nau'in ƙwayar ƙwayar ƙwayar cuta, ita ce hanya ta farko da aka yi amfani da ita wajen samar da masana'antu na polyacrylamide, kuma ta kasance babbar hanyar samar da masana'antu na polyacrylamide. An yi nazarin polymerization na maganin ruwa mai zurfi.
Hanyar 3: Inverted emulsion polymerization
Reversed-lokaci colloidal watsawa tsarin bukatar da za a shirya kafin juya-lokaci emulsion polymerization da juyi-lokaci dakatar polymerization, wato, ruwa / mai (W / 0) iri-iri watsawa tsarin da aka kafa a cikin man lokaci na monomer aqueous bayani ta hanyar zuga watsawa watsawa. ko emulsifier, sa'an nan kuma an ƙara ƙaddamarwa don polymerization na tushe kyauta.
Gabaɗaya, ana amfani da masu ƙaddamar da mai mai narkewa a cikin juyi-lokaci emulsion polymerization, galibi masu ƙaddamar da radical free anionic da waɗanda ba na ionic free radical initiators, yayin da juye-lokaci dakatar polymerization amfani da ruwa mai narkewa initiators, kamar persulfate. Akwai ra'ayoyi guda biyu akan tsarin nucleation na AM/AA juyi emulsion polymerization: micellar nucleation da monomer droplet nucleation. Kinetics ne quite daban-daban daga na hali tabbatacce emulsion polymerization.
Hanyar 4: Juya dakatarwar polymerization
Juya-lokaci dakatar polymerization hanya ce mai kyau don samar da masana'antu na polymers masu narkewa da aka haɓaka a cikin shekaru 10 na baya-bayan nan. Di-monie yayi nazari akan polymerization na dakatarwa-lokaci na AM ta amfani da haɓakawa, NMR da microscopy na lantarki a cikin 1982.
Hanyar 5: Sauran hanyoyin polymerization
Baya ga hanyoyin da ke sama, ana iya canza homopolymer da copolymer na acrylamide da abubuwan da suka samo asali ta hanyar Mannich reaction da grafting copolymerization. Gabatarwar amines a cikin polyacrylamide yayin amsawar Mannich hanya ce mai mahimmanci don samun cationic polyelectrografting na polyacrylamide. Amines da aka saba amfani da su sune dimethylamine, diethylamine, diethanolamine da sauransu.
AM/AA galibi ana grafting da sitaci don shirya resins masu ɗaukar nauyi sosai, ko tare da wasu macromolecular monomers don dasa AM/AA cikin wasu membranes. Babban nauyin kwayoyin cationic polyacrylamide (CPAM) ana amfani dashi sosai wajen samar da mai, amma HPAM yana da ƙarancin haƙurin gishiri.
Lokacin aikawa: Maris-09-2023