m-Xylylenediamine: Mwala Wamtengo Wapatali Wokhala ndi Magwiridwe Abwino Kwambiri ndi Ntchito Zosiyanasiyana

Pakati pa nyenyezi zambirimbiri zomwe zili ndi zinthu zopangira mankhwala, m-phenyldimethylamine, yokhala ndi mawonekedwe ake apadera komanso odabwitsa, yakhala chinthu chofunikira kwambiri m'mafakitale ambiri, ikutsogolera kusintha kwa mafakitale ndi kupanga zinthu zatsopano pambuyo pa ina.
M-phenyldimethylamine ndi madzi opanda mtundu pa kutentha kwa chipinda, okhala ndi kulemera kwa mamolekyulu a 136.194, kuchuluka kwa 1.1±0.1 g/cm³, kutentha kwa 247.0±0.0 °C (760 mmHg), ndi kutentha kwa 14°C. Mu kapangidwe kake ka mamolekyulu, gulu la aliphatic primary amine ndi mphete ya benzene zimagwirizanitsidwa mwanzeru, zomwe zimapatsa zinthu zingapo zodabwitsa.
"Super Injini" mu gawo la epoxy curating
Monga epoxy resin curing agent, m-phenyldimethylamine ndi mtsogoleri mumakampani. Popeza ili ndi magulu a aliphatic primary amine, imatha kuchiritsa mwachangu kutentha kwa chipinda, kufupikitsa kwambiri nthawi yopangira ndikuwonjezera magwiridwe antchito opanga. Chogulitsa chochiritsidwachi sichimangokhala ndi kutentha kwabwino komanso chimatha kukhala chokhazikika m'malo otentha kwambiri, chomwe ndi chapamwamba kuposa ma polyamine wamba a aliphatic; Chimakhalanso ndi kukana kwapadera kwa mankhwala. Kaya ndi zosungunulira zachilengedwe monga toluene kapena zinthu zowononga monga 10% wt sulfuric acid, n'zovuta kuiwononga. Izi zathandiza kuti iwoneke bwino m'minda ya zomatira zomatira za batri ndi zomatira zomatira zomatira. Ndi ubwino wa kukhuthala kochepa, kuyenda kosavuta komanso kulowa bwino, imatsimikizira kuti zomatirazo zitha kutsekedwa bwino, kukana kuwonongeka kwa mpweya wa asidi ndi madzi a asidi, komanso kupirira mphamvu zakunja, motero kuteteza magwiridwe antchito otetezeka komanso okhazikika a mabatire. Pakadali pano, pogwiritsa ntchito zokutira zotsutsana ndi dzimbiri pokonza mlatho, zokutira mapaipi, zotengera zombo, pansi, ndi zina zotero, m-phenylenediamine, pamodzi ndi epoxy resin, imatha kusonyeza kumamatira bwino ngakhale m'malo ozizira, kukana bwino nyengo zovuta ndikuwonjezera moyo wautumiki wa malo.
"Chilimbikitso cha Zatsopano" cha mafakitale osiyanasiyana
Pakupanga ma resini ndi zokutira za polyurethane, m-phenyldimethylamine imagwira ntchito ngati chinthu chofunikira kwambiri ndipo imagwira ntchito yomanga ma molekyulu ogwira ntchito kwambiri. Ikhoza kukulitsa kusinthasintha, kukana kuwonongeka ndi kukana mphamvu kwa zinthu za polyurethane, kupatsa zokutirazo mphamvu yolimbana ndi nyengo komanso kuwala. Imagwiritsidwa ntchito kwambiri pokongoletsa pamwamba ndi kuteteza mipando, magalimoto, zomangamanga ndi zina. Pankhani yowonjezera mphira, kuwonjezera kwake kumatha kukonza njira yopangira mphira, kuwonjezera mphamvu, kusinthasintha ndi kukana kukalamba kwa zinthu za mphira, ndikukweza bwino mtundu wa zinthu za mphira kuyambira matayala mpaka zisindikizo za mphira. Kuphatikiza apo, m-phenyldimethylamine ndi monomer yofunika kwambiri popanga zinthu za nayiloni zogwira ntchito kwambiri monga polyadipylm-phenyldimethylamine (MXD6). MXD6, yokhala ndi kapangidwe kake kapadera koperekedwa ndi m-phenyldimethylamine, ili ndi zinthu zotchinga kwambiri (kulowa kwa okosijeni ndi 1/10 yokha ya PA6), mphamvu yayikulu komanso kulimba (mphamvu yolimba mpaka 280MPa, flexural modulus mpaka 24GPa), kukana kutentha bwino (kutentha kosinthasintha kutentha mpaka 73.8℃, 1.8MPa), komanso kuchepa kwa kuyamwa madzi. Yawonetsa kuthekera kwakukulu kogwiritsa ntchito m'magawo apamwamba monga zipangizo zopepuka zama robot, zida zamagalimoto atsopano amphamvu, ndi ma phukusi apamwamba azakudya, ndipo yakhala mphamvu yayikulu yopititsa patsogolo kukweza mafakitale. Sikuti zokhazo, m'mafakitale ambiri monga mapulasitiki osavuta kuwala, mankhwala ophera tizilombo, zinthu zomaliza ulusi, zoletsa dzimbiri, zinthu zothira, mafuta, ndi kukonza mapepala, m-phenyldimethylamine, yokhala ndi zinthu zake zapadera, imapereka mphamvu yopitilira yoyendetsera zinthu zatsopano komanso kukonza magwiridwe antchito.
Kuyambira pakupanga mpaka kugwiritsidwa ntchito komaliza, m-phenyldimethylamine imatsatira kwambiri kuwongolera khalidwe. Njira yopangira imagwiritsa ntchito ukadaulo wapamwamba, kuyambira pa chisakanizo cha m-xylene ndi p-xylene, kenako imadutsa mu okosijeni ndi mpweya ndi ammonia kuti ipange m-xylene ndi p-phenyldimethylnitrile. Pambuyo pake, imadutsa munjira zingapo monga kutsuka m'madzi, kuumitsa, ndi catalytic hydrogenation, pamapeto pake kupeza zinthu zoyera kwambiri. Gulu lililonse la zinthu limayesedwa mwamphamvu kuti litsimikizire kuti ndi loyera la ≥ 99.0%, ndi zizindikiro zonse zokhazikika komanso zodalirika, zomwe zimapatsa makasitomala chisankho cholimbikitsa. Chogulitsacho chimapakidwa m'mabokosi apulasitiki a makilogalamu 200 kuti chinyamulidwe mosavuta komanso kusungidwa. Chiyenera kusungidwa pamalo ozizira komanso opumira bwino, kutsatira malamulo osungira ndi mayendedwe a zinthu zoyaka komanso zapoizoni kuti zitsimikizire kuti khalidwe la chinthucho silikukhudzidwa.
M-phenyldimethylamine, yokhala ndi ntchito yabwino kwambiri ngati maziko ndi ntchito zosiyanasiyana monga mapiko, ikuthandiza mafakitale osiyanasiyana kudutsa m'mipata yaukadaulo ndikuyamba ulendo watsopano waukadaulo wapamwamba komanso wamakono. Gwirizanani ndi m-phenyldimethylamine ndikuvomereza tsogolo losatha la makampani opanga mankhwala pamodzi!