Wannan labarin yafi zaɓi MMA, BA, AA a matsayin monomers, kuma yayi magana akan abubuwan da ke haifar da polymerization tare da su, kamar jerin kari, adadin adadin da zafin jiki na mai farawa da kowane monomer, kuma ya gano mafi kyawun yanayin tsari na polymerization. Ana fara shafa robar, sannan a zuga a narkar da shi tare da gaurayawan kaushi a 70 ~ 80 ° C, sa'an nan kuma ana ƙara mai ƙaddamar da BPO a cikin batches. Na farko monomer MMA narkar da BOP ana ƙara a 80 ~ 90 ° C na minti 20, sa'an nan kuma ƙara da na biyu monomer na BPO, bayan wani 20 minutes, ƙara na uku monomer a 84 ~ 88 ℃ da motsawa na 45 minutes. dumi don 1.5 ~ 2 hours, sa'an nan kuma samun CR / MMA-BA-AA uku-hanyar dasa polymerization m, Kwasfa ƙarfi ya fi girma. CR/MMA-BA, ƙimar sa shine 6.6 KN.m-1.
Mahimman kalmomi: Neoprene m, Takalma manne, Multi-bangaren grafted neoprene m.
Cellulose etherMCkumaHPMCda kyau watsawa yi, emulsification, thickening, mannewa, film samuwar, ruwa riƙewa, kuma suna da kyau kwarai solubility na ruwa, surface aiki, kwanciyar hankali, da kuma rushe a Organic kaushi.
Babban kayayyakin da aka ci gaba a halin yanzu sune RT jerin MC da HPMC iri, wanda maki ne 50RT (Methylcellulose), 60RT (Hydroxypropylmethylcellulose), 65RT (Hydroxypropylmethylcellulose), 75RT (Hydroxypropylmethylcellulose), m zuwa Chemical maki na DOW. F da K, bi da bi.
Kayayyakin jerin RT ɗin suna da amfani sosai a cikin kayan gini saboda haɗin kai, kwanciyar hankali na dakatarwa da riƙewar ruwa. Misali, ana iya kera su zuwa “bangon yumbu da kayan adhesives na bene” masu inganci, wanda aka fi sani da foda, wanda aka yi amfani da su a tashar jirgin kasa ta yamma ta Beijing, tasirin yana da kyau. Bugu da kari, ana iya amfani da shi azaman gelled electrolyte a electrolytic capacitors da bonded electrode grids a cikin lantarki kayan, kamar yadda atropine, aminopyrine da tsuliya lu'ulu'u a Pharmaceuticals, kuma a matsayin thickener ga ruwa emulsions a fenti. A cikin fenti na latex da fenti mai narkewa da ruwa, ana iya amfani da shi azaman wakili mai samar da fim, mai kauri, emulsifier da stabilizer, da sauransu don manne fuskar bangon waya, ruwan rewetting roba foda, da dai sauransu.
Mahimman kalmomi: Methyl Cellulose, Hydroxy Propyl Cellulose, m, aikace-aikace.
Haɓaka takarda mai filastik filastik manne hannu na tushen ruwa
A cikin 'yan shekarun nan, an ƙaddamar da sabon tsari na liƙa fim ɗin filastik akan abubuwan da aka buga. Yana da BOPP (fim ɗin polypropylene mai daidaitacce) wanda aka lulluɓe shi da manne sannan kuma a haɗa shi tare da bugu da ƙari bayan an danna shi da silinda na roba da abin nadi mai dumama don samar da takarda. / Filastik 3-in-1 bugu. Wannan ya haɗa da matsalar haɗin takarda da filastik. BOPP abu ne wanda ba na iyakacin duniya ba, saboda haka, akwai buƙatar mannewa wanda ke da kyau adhesion zuwa duka polar da abubuwan da ba na polar ba.
Haɗa mannen SBS tare da resin epoxy yana da dacewa mai kyau. SBS shine elastomer viscose. Ana iya gani daga lanƙwan gazawarsa cewa don haɓaka ƙarfin lalata na viscose, yakamata a sarrafa shi a kusa da SBS: resin epoxy = 2: 1. Daga ƙwanƙwasa ƙarfin kwasfa, ana iya ganin cewa lokacin da rabo ya yi girma, ƙarfin kwasfa zai yi girma, amma manne zai karu. Don kauce wa mannewa, SBS: epoxy resin = 1: 1 ~ 2.5: 1 za a iya sarrafawa don samun ƙarfin kwasfa mai tasowa a hankali. Yin la'akari sosai, ƙayyade SBS a cikin babban manne: resin epoxy = 1: 1 ~ 3.5: 1.
Babban aikin yin amfani da resin tackifying shine ƙara ƙarfin haɗin gwiwa na matrix da haɓaka wettability na manne da saman haɗin gwiwa. Rosin tackifier da aka yi amfani da shi a cikin wannan binciken shine rosin tackifier wanda ya ƙunshi rosin na yau da kullun da kuma rosin da aka ƙera a cikin nau'i daban-daban. Ta hanyar gwaje-gwaje da yawa, an kammala cewa adadin dimerized rosin a cikin tackifier shine 22.5%, kuma ƙarfin peeling na manne da aka shirya bisa ga wannan rabo shine 1.59N/25mm (takarda-roba).
Adadin tackifier yana da takamaiman tasiri akan kaddarorin mannewa. Mafi kyawun sakamako shine lokacin da rabon babban manne da tackifier shine 1: 1. Ƙarfin kwasfa N/mm filastik-roba 1.4, takarda-roba 1.6.
A cikin wannan binciken, an yi amfani da MMA azaman diluent don haɗa SBS da MMA. Gwaje-gwajen sun gano cewa yin amfani da MMA ba zai iya cimma manufar kneading abubuwan da ke cikin colloid kawai ba, amma har ma ya rage danko da inganta ƙarfin mannewa. Saboda haka, MMA shine mai dacewa da gyare-gyaren diluent. Bayan gwaje-gwaje, adadin MMA da aka yi amfani da shi shine jimlar adadin manne 5% ~ 10% ya dace.
Tunda viscose da aka tsara ya kamata ya zama mai narkewar ruwa, muna zaɓar farin latex (polyvinyl acetate emulsion) azaman mai ɗaukar ruwa mai narkewa. Adadin farin latex yana lissafin kashi 60% na jimlar viscose. Bayan da ruwa na tushen viscose ne emulsified a cikin wani ruwa-emulsion jihar ta hanyar watsawa da emulsification na emulsified m, idan diluted daidaito bai dace da amfani, shi za a iya diluted da ruwa. Wannan hanyar dilution yana da ƙananan farashi kuma ba mai guba ba (babu buƙatar amfani da kaushi na halitta), kuma mafi kyawun kewayon ruwan dilution shine 10% ~ 20%.
Don cire ragowar viscose, an gwada cewa ana amfani da maganin Na2CO3 dilute a matsayin wakili na alkalizing, kuma sakamakon shine mafi kyau. Ka'idar tasirin wakili na alkalizing na iya zama cewa aikin saponification yana gabatar da wasu ions masu ƙarfi masu ƙarfi, irin su ions sodium, ta yadda asalin rosin acid ɗin da ba a iya narkewa ya zama gishiri mai Soluble. Bugu da ƙari, idan an ƙara tushe mai ƙarfi da yawa a cikin manne, ƙarfin mannewa zai ɓace, don haka manne ya kasa, don haka manne bai dace da yanayin alkaline ba.
Gudun tsarin da ya dace.
Lokacin aikawa: Afrilu-25-2024