Phakathi kwesibhakabhaka esikhanyayo sezinkanyezi sezinto zokusetshenziswa zamakhemikhali, i-m-phenyldimethylamine, enezakhiwo zayo eziyingqayizivele nezivelele, isibe yinto ebalulekile ezimbonini eziningi, ihola ukuguqulwa kwezimboni kanye nokusungula izinto ezintsha ngemva kwenye.
I-M-phenyldimethylamine iwuketshezi olungenambala ekamelweni lokushisa, olunesisindo sama-molecule esingu-136.194, ubuningi obungu-1.1±0.1 g/cm³, iphuzu lokubila elingu-247.0±0.0 °C (760 mmHg), kanye nephuzu lokuncibilika elingu-14°C. Esakhiweni salo sama-molecule, iqembu le-aliphatic primary amine kanye nendandatho ye-benzene kuhlanganiswe ngobuhlakani, okwenza kube nochungechunge lwezakhiwo eziphawulekayo.
"Injini Enkulu" emkhakheni wokwelapha i-epoxy
Njenge-epoxy resin curing agent, i-m-phenyldimethylamine ingumholi embonini. Ngenxa yokuthi iqukethe amaqembu e-aliphatic primary amine, ingaba nemiphumela yokwelapha ngokushesha ekamelweni lokushisa, inciphise kakhulu umjikelezo wokukhiqiza futhi ithuthukise ukusebenza kahle kokukhiqiza. Umkhiqizo osuqediwe awugcini nje ngokuba nokumelana okuhle kokushisa futhi ungahlala uzinzile ezindaweni ezishisa kakhulu, okungcono kune-polyamines ezivamile ze-aliphatic; Uphinde ube nokumelana okuvelele kwamakhemikhali. Kungakhathaliseki ukuthi kuyizinto eziphilayo ezifana ne-toluene noma imidiya egqwalisayo njenge-10% wt sulfuric acid, kunzima ukuyilimaza. Lesi sici sikwenze kwakhanya kakhulu emikhakheni yezinamathiselo zokuvala ibhethri kanye nezinamathiselo ze-terminal post. Ngezinzuzo ze-viscosity ephansi, ukugeleza okulula kanye nokungena okuhle kakhulu, kuqinisekisa ukuthi i-adhesive ingavalwa ngokuphelele, imelane nokuguguleka kwegesi ye-acid kanye noketshezi lwe-acid, futhi imelane nemiphumela yamandla angaphandle, ngaleyo ndlela ivikele ukusebenza okuphephile nokuzinzile kwamabhethri. Okwamanje, ekusetshenzisweni kwezimbozo zokulwa nokugqwala zokulungisa amabhuloho, ukugqoka kwamapayipi, izitsha zemikhumbi, phansi, njll., i-m-phenylenediamine, ngokuhlanganiswa ne-epoxy resin, ingabonisa ukunamathela okuhle kakhulu ngisho nasezindaweni ezinomswakama, imelane ngempumelelo nezimo ezinzima futhi yandise impilo yesevisi yezikhungo.
"Isikhuthazi Sokusungula Izinto Ezintsha" sezimboni ezahlukahlukene
Ekukhiqizweni kwama-resin nama-coatings e-polyurethane, i-m-phenyldimethylamine isebenza njengezinto eziwusizo ezibalulekile futhi ihlanganyela ekwakhiweni kwezakhiwo zama-molecule ezisebenza kahle kakhulu. Ingathuthukisa kakhulu ukuguquguquka, ukumelana nokuguguleka kanye nokumelana nomthelela wezinto ze-polyurethane, inikeze ama-coatings ukumelana nesimo sezulu okuphezulu kanye nokucwebezela. Isetshenziswa kabanzi ekuhlobiseni nasekuvikeleni indawo efenisha, ezimotweni, ekwakheni nakwezinye izinkambu. Emkhakheni wezithasiselo zerabha, ukwengeza kwayo kungenza ngcono inqubo yerabha ibe ngcono, kuthuthukise amandla, ukuqina kanye nokumelana nokuguga kwemikhiqizo yerabha, futhi kuthuthukise ngokuphelele ikhwalithi yemikhiqizo yerabha kusukela emathayini kuya ezivalweni zerabha. Ngaphezu kwalokho, i-m-phenyldimethylamine nayo iyi-monomer ebalulekile yokwenziwa kwezinto ze-nylon ezisebenza kahle njenge-polyadipylm-phenyldimethylamine (MXD6). I-MXD6, enesakhiwo sayo esiyingqayizivele esinikezwe yi-m-phenyldimethylamine, inezakhiwo zokuvimbela eziphakeme (ukungena komoya-mpilo kuyi-1/10 kuphela ye-PA6), amandla aphezulu nokuqina (amandla okudonsa afinyelela ku-280MPa, i-modulus ye-flexural afinyelela ku-24GPa), ukumelana okuhle nokushisa (izinga lokushisa lokushintshashintsha kokushisa lifinyelela ku-73.8℃, 1.8MPa), kanye nesilinganiso esiphansi sokumuncwa kwamanzi. Ibonise amandla amakhulu okusebenzisa emikhakheni esezingeni eliphezulu njengezinto ezilula zamarobhothi, izingxenye zezimoto zamandla amasha, kanye nokupakishwa kokudla okuphezulu, futhi isibe yimbangela eyinhloko eqhuba ukuthuthukiswa kwezimboni. Akukhona lokho kuphela, ezimbonini eziningi ezifana nepulasitiki ezwela ukukhanya, izibulala-zinambuzane, izinto zokuqeda ifayibha, izinto zokuvimbela ukugqwala, izinto zokugcoba, kanye nokucubungula iphepha, i-m-phenyldimethylamine, enezakhiwo zayo ezihlukile, inikeza amandla okushayela aqhubekayo okusungula umkhiqizo kanye nokwenza ngcono ukusebenza.
Kusukela emthonjeni wokukhiqiza kuya ekusetshenzisweni kokugcina, i-m-phenyldimethylamine inamathela ngokuqinile ekulawulweni kwekhwalithi. Inqubo yokukhiqiza isebenzisa ubuchwepheshe obuthuthukisiwe, kusukela engxubeni ye-m-xylene ne-p-xylene, bese kuba nokusabela kwe-oxidation nomoya ne-ammonia ukuze kukhiqizwe i-m-xylene ne-p-phenyldimethylnitrile. Ngemva kwalokho, idlula ochungechungeni lwezinyathelo eziqondile njengokugeza ngamanzi, ukomisa, kanye ne-catalytic hydrogenation, ekugcineni ithole imikhiqizo ehlanzekile kakhulu. Iqoqo ngalinye lemikhiqizo lihlolwa ngokuqinile ukuqinisekisa ubumsulwa obungu-≥ 99.0%, nazo zonke izinkomba zizinzile futhi zithembekile, okunikeza amakhasimende ukukhetha okuqinisekisayo. Umkhiqizo upakishwe kuma-drum epulasitiki angamakhilogremu angu-200 ukuze uthuthwe futhi ugcinwe kalula. Kufanele ugcinwe endaweni epholile futhi enomoya omuhle, unamathele ngokuqinile emithethweni yokugcina kanye nokuthuthwa kwezinto ezivuthayo nezinobuthi ukuqinisekisa ukuthi ikhwalithi yomkhiqizo ayithinteki.
I-M-phenyldimethylamine, ngokusebenza kwayo okuvelele njengesisekelo kanye nezinhlelo zokusebenza ezahlukahlukene njengamaphiko, isiza izimboni ezahlukahlukene ukuthi zidlule ezinkingeni zobuchwepheshe futhi ziqale uhambo olusha lwekhwalithi ephezulu kanye nentuthuko entsha. Joyina i-m-phenyldimethylamine futhi wamukele ikusasa elingenamkhawulo lemboni yamakhemikhali ndawonye!
Isikhathi sokuthunyelwe: Juni-30-2025
