Wannan labarin ya fi zaɓar MMA, BA, AA a matsayin monomers, kuma ya tattauna abubuwan da ke haifar da polymerization na graft tare da su, kamar jerin ƙarin abubuwa, adadin ƙarin abubuwa da zafin amsawar mai farawa da kowane monomer, kuma ya gano mafi kyawun yanayin tsarin polymerization na graft. Da farko ana masticated robar, sannan a juya shi kuma a narkar da shi da gaurayen mai narkewa a 70 ~ 80°C, sannan a ƙara BPO mai farawa a cikin rukuni-rukuni. Ana ƙara monomer na farko da aka narkar da shi da BOP a 80 ~ 90°C na minti 20, sannan a ƙara shi da monomer na biyu na BPO, bayan wasu mintuna 20, a ƙara monomer na uku a 84 ~ 88 ℃ a juya na minti 45, a ajiye shi a ɗumi na tsawon awanni 1.5 ~ 2, sannan a sami manne mai haɗa polymerization na CR/MMA-BA-AA mai hanyoyi uku, Ƙarfin barewa ya fi CR/MMA-BA, ƙimarsa ita ce 6.6 KN.m-1.
Kalmomi Masu Mahimmanci: Manna Neoprene, Manna Takalma, Manna Neoprene mai sassa da yawa.
Cellulose etherMCkumaHPMCsuna da kyakkyawan aikin watsawa, emulsification, thickening, mannewa, ƙirƙirar fim, riƙe ruwa, kuma suna da kyakkyawan narkewar ruwa, aikin saman, kwanciyar hankali, da narkewa a cikin abubuwan narkewar halitta.
Manyan samfuran da aka haɓaka a halin yanzu sune nau'ikan RT series MC da HPMC, waɗanda makinsu shine 50RT (Methylcellulose), 60RT (Hydroxypropylmethylcellulose), 65RT (Hydroxypropylmethylcellulose), 75RT (Hydroxypropylmethylcellulose), waɗanda suka dace da maki na DOW Chemical Company sune Methocel A, E, F da K, bi da bi.
Kayayyakin jerin RT suna da matuƙar amfani a cikin kayan gini saboda haɗin kansu, kwanciyar hankali na dakatarwa da kuma riƙe ruwa. Misali, ana iya ƙera su zuwa "manne bango da tayal ɗin yumbu" masu inganci, waɗanda aka fi sani da foda na roba, waɗanda aka yi amfani da su a Tashar Jirgin Ƙasa ta Yammacin Beijing, tasirin yana da kyau. Bugu da ƙari, ana iya amfani da shi azaman gelled electrolyte a cikin electrolytic capacitors da connected electrode grids a cikin kayan lantarki, kamar atropine, aminopyrine da dubura lu'ulu'u a cikin magunguna, da kuma azaman thickener don emulsions na ruwa a cikin fenti. A cikin fenti na latex da fenti mai narkewa a ruwa, ana iya amfani da shi azaman wakili mai samar da fim, mai kauri, emulsifier da stabilizer, da sauransu don manne fuskar bangon waya, foda roba mai sake jika ruwa, da sauransu.
Kalmomi masu mahimmanci: Methyl Cellulose, Hydroxy Propyl Cellulose, manne, aikace-aikace.
Ƙirƙirar manne na hannu na takarda mai amfani da ruwa ta filastik
A cikin 'yan shekarun nan, an ƙirƙiri wani sabon tsari na liƙa fim ɗin filastik a kan abin da aka buga. BOPP (fim ɗin polypropylene mai kusurwa biyu) an lulluɓe shi da manne sannan a haɗa shi da abin da aka buga bayan an matse shi da silinda ta roba da abin naɗa dumama don samar da takarda. / Fim ɗin filastik 3-in-1. Wannan ya haɗa da matsalar haɗin takarda da filastik. BOPP abu ne da ba shi da polar, saboda haka, akwai buƙatar manne wanda ke da kyakkyawan mannewa ga abubuwa na polar da waɗanda ba polar ba.
Haɗa manne na SBS da resin epoxy yana da kyakkyawan jituwa. SBS viscose ne na elastomer. Ana iya gani daga lanƙwasa ta gazawar cewa domin inganta ƙarfin manne na viscose, ya kamata a sarrafa shi a kusa da SBS: resin epoxy = 2:1. Daga lanƙwasa ƙarfin barewa, ana iya ganin cewa lokacin da rabon ya yi yawa, ƙarfin barewa zai yi kyau, amma mannewar ma ta ƙaru. Domin guje wa mannewa, ana iya sarrafa SBS: resin epoxy = 1:1~2.5:1 don samun ƙarfin barewa mai tasowa a hankali. Idan aka yi la'akari da cikakken bayani, ƙayyade SBS a cikin babban manne: resin epoxy = 1:1~3.5:1.
Babban aikin amfani da resin mai ɗaurewa shine ƙara ƙarfin haɗin matrix da inganta danshi na manne da saman haɗin. Resin mai ɗaurewa da aka yi amfani da shi a cikin wannan binciken shine rosin mai ɗaurewa wanda ya ƙunshi rosin na yau da kullun da rosin mai ƙyalli a cikin girma dabam-dabam. Ta hanyar gwaje-gwaje da yawa, an kammala da cewa kashi na rosin mai ƙyalli a cikin tackifier shine 22.5%, kuma ƙarfin barewar manne da aka shirya bisa ga wannan rabo shine 1.59N/25mm (takarda-roba).
Adadin tackifier yana da wani tasiri akan halayen manne. Mafi kyawun tasirin shine lokacin da rabon babban manne da tackifier shine 1: 1. Ƙarfin barewar N/mm filastik-roba 1.4, takarda-roba 1.6.
A cikin wannan binciken, an yi amfani da MMA a matsayin mai narkewa don haɗa SBS da MMA. Gwaje-gwaje sun gano cewa amfani da MMA ba wai kawai zai iya cimma manufar murɗa abubuwan da ke cikin colloid ba, har ma yana rage ɗanko da inganta ƙarfin manne. Saboda haka, MMA wani mai narkewa ne mai dacewa da aka gyara. Bayan gwaje-gwaje, adadin MMA da aka yi amfani da shi shine jimlar adadin manne 5% ~ 10% ya dace.
Tunda viscose ɗin da aka ƙera yakamata ya zama mai narkewa cikin ruwa, muna zaɓar farin latex (polyvinyl acetate emulsion) a matsayin mai ɗaukar ruwa mai narkewa cikin ruwa. Adadin farin latex ya kai kashi 60% na jimlar viscose. Bayan an canza viscose ɗin da ke cikin ruwa zuwa yanayin emulsion na ruwa ta hanyar watsawa da emulsion na mai ɗaukar emulsified, idan daidaiton da aka narkar bai dace da amfani ba, ana iya narkar da shi da ruwa. Wannan hanyar narkarwa tana da araha kuma ba ta da guba (babu buƙatar amfani da sinadarai na halitta), kuma mafi kyawun kewayon ruwan narkarwa shine 10% ~ 20%.
Domin cire ragowar viscose, ana gwada cewa ana amfani da maganin Na2CO3 mai narkewa azaman maganin alkali, kuma tasirin shine mafi kyau. Ka'idar tasirin maganin alkali na iya zama cewa amsawar saponification yana gabatar da wasu ions masu ƙarfi na polar, kamar ions na sodium, don haka asalin rosin acid mara narkewa ya zama gishirin sodium mai narkewa. Bugu da ƙari, idan aka ƙara tushe mai ƙarfi da yawa a cikin manne, ƙarfin manne zai ɓace, don haka manne ɗin ya gaza, don haka manne ɗin bai dace da yanayin alkaline ba.
Tsarin aiki mai dacewa.
Lokacin Saƙo: Afrilu-25-2024