MOFAN TMEDA (N,N,N',N'-tetramethylethylenediamine, CAS 110-18-9) ndi chothandizira chapamwamba cha tertiary amine chopangidwira machitidwe opanga thovu lamalonda. Chophatikiza chamankhwala chosiyanasiyanachi chimagwira ntchito ngati chothandizira chowongolera bwino komanso chopepuka panthawi yokonza polyol yamadzimadzi. Akatswiri opanga njira amadalira mawonekedwe ake apadera kuti alimbikitse mapangidwe a khungu losalala mu thovu la polyurethane. Chowonjezerachi chimapereka kuwongolera koyenera kwa reaction kinetic pamagwiritsidwe osiyanasiyana a polyurethane system. Akatswiri opanga njira ndi ogwira ntchito m'mafakitale amatsatira malangizo awa aukadaulo kuti akonze magawo a njira pamene akusunga miyezo yolimba yachitetezo. Akatswiri ogula amapezanso chidziwitso chofunikira chaukadaulo chokhudza kukhazikika kwa zinthu ndi magwiridwe antchito odalirika. Bukuli lathunthu limathandizira kuyang'anira bwino zinthu m'malo onse.

Mfundo Zofunika Kwambiri

Katundu wa Mankhwala a MOFAN TMEDA

Kapangidwe ka Mamolekyu ndi Miyezo Yoyera

Makhalidwe oyambira a mankhwala amofani tmedafotokozani momwe imagwirira ntchito popanga polyurethane. Molekyulu iyi ili ndi formula ya molekyulu C6H16N2. Imawonetsa kulemera kwa molekyulu ya 116.2 g/mol. Miyezo yodziwika bwino yamalonda imafuna kuyera kocheperako kwa 98.00%. Madziwo ali ndi madzi okwanira 0.50%. Kuyera kwa madzi kumasunga reactivity ya mankhwala nthawi zonse pokonza. Kapangidwe ka mankhwala kakang'ono kamapereka kuchuluka kwa amine kwapamwamba kwambiri. Kapangidwe ka amine kapadera aka kamathandizira kuti polyurethane iyambe kugwira ntchito.

Ma formulators amayerekeza kulemera kwa ma molekyulu a catalyst kuti awone momwe ma molekyulu amagwirira ntchito m'njira zosiyanasiyana. Kapangidwe ka ma molekyulu kamapatsa mankhwala awa mawonekedwe osiyana.

Kapangidwe ka amine kosavuta kamalola kuyenda mwachangu m'machitidwe a polyol. Kapangidwe kameneka kamathandizira kuti gel iyambe kugwira ntchito mwachangu.

Kukhazikika kwa Solvency ndi Polyol Blend

Makhalidwe akuthupi ndi monga mawonekedwe amadzimadzi owoneka bwino, opanda mtundu ngati udzu. Zinthu zopangira zimatulutsa fungo lapadera la ammoniacal. Zowonjezera zamadzimadzi zimasungunuka 100% m'madzi, mowa, ndi zosungunulira zachilengedwe. Kusungunuka kwathunthu kumathandizira kuti madzi azigwiritsidwa ntchito nthawi yonse yosakaniza zinthu zopangira. Kuyera kwa mankhwala kumalepheretsa kulekanitsa zosakaniza zogwira ntchito m'matanki osungiramo zinthu. Kusungunuka kwa madzi kumawongolera mwachindunji mawonekedwe a thovu lomaliza.

Amasakanikirana ndi madzi, ma alcohols, ma esters, ndi ma polyol ambiri

Kugwirizana kwamphamvu kwa zosungunulira kumalimbitsa zosakaniza zovuta za polyol. Malo ogwira ntchito a amine amapanga mphamvu yothandiza mwachindunji pakusakaniza madzi. Kusungunuka kwakukulu kumapatsa opanga mapangidwe mphamvu yodziwikiratu. Opanga mapangidwe amawona mphamvu yokhazikika yolimba panthawi yonse yosungiramo zinthu zamadzimadzi. Makhalidwe abwino a mankhwala amateteza ntchito ya chothandizira pakapita nthawi yayitali. Kapangidwe ka mamolekyu kameneka kamatsimikizira kuti zinthuzo zimachira mofanana m'njira zosiyanasiyana.

Udindo ngati Chothandizira cha Polyurethane

Kulinganiza kwa Kinetic kwa Gelling ndi Blowing

Opanga makina amasanthula magawo a kinetic rate kuti asankhe chowonjezera choyenera cha machitidwe omwe akufuna.MOFAN TMEDAimagwira ntchito ngati chothandizira cha polyurethane chokhala ndi reactivity yolinganizika panthawi yopanga polyurethane. Chogwiritsiridwa ntchitochi chikuwonetsa ntchito yocheperako. Khalidwe locheperako ili limakhazikitsa kusintha kwa mpweya pamodzi ndi mapangidwe a maukonde a polima. Ma formulators a dongosolo amalinganiza mosamala magawo a kinetic kuti apewe kupangika kwa zolakwika mu kapangidwe kake panthawi yokonza. Kuchuluka kwa gelling kumapangitsa kulimba msanga musanadzaze nkhungu yonse. Mosiyana ndi zimenezi, kuthamanga kwambiri kwa mpweya kumapangitsa mabowo ang'onoang'ono ndi kapangidwe ka maselo okhuthala. MOFAN TMEDA imapereka mawonekedwe apakati a kinetic omwe amathetsa mavuto onsewa nthawi imodzi. Kukonza madzi kumakhala kokhazikika pa kutentha kosiyanasiyana kopanga.

Mu kapangidwe ka polyurethane thovu, chiŵerengero cha zochita za gelling k1 ndi 4.19 (×10). Chiŵerengero cha zochita za blowing k2 ndi 1.14 (×10). Kulinganiza kwa kinetic kumeneku kumapereka chiŵerengero chosiyana cha blowing/gelling cha 2.72 (×10⁻¹). Opanga ma formula amayesa ziwerengero izi za kinetic kuti apange njira zolimba zopangira. Mwachitsanzo, TEDA imapereka gelling yolimba ndi k1 ya 10.90 ndi k2 ya 1.45. Mosiyana ndi zimenezi, PMDETA imagwira ntchito ngati chothandizira champhamvu cha blowing ndi k1 ya 4.26 ndi k2 ya 15.90. BDMAEE imakondanso blowing, ndi k1 ya 2.99 ndi k2 ya 11.70. DMCHA imasonyeza ntchito yochepa ndi k1 ya 2.22 ndi k2 ya 0.83. Chiŵerengero cha blowing/gelling cha TMEDA chikugwirizana ndi chiŵerengero cha 2.72 (×10⁻¹) cha DMAEMP. Mbiri yolinganizika iyi imapereka ubwino wofunikira pakulamulira kukwera kwa maselo ndi kulumikizana kwa ma crosslinking panthawi iliyonse ya polima reaction.

Kuyambitsa kwa Nucleophilic Isocyanate-Hydroxyl

Kapangidwe ka mamolekyulu kakang'ono kameneka kamapatsa MOFAN TMEDA makhalidwe apadera ogwirira ntchito. Ma electron awiri osagawidwa pa ma atomu awiri a nayitrogeni amayendetsa mgwirizano wa nucleophilic reaction. Kapangidwe ka amine aka kamapanga complex yakanthawi yokhala ndi ma atomu a carbon ophilic mkati mwa magulu ogwira ntchito a isocyanate. Chifukwa chake, kapangidwe ka mankhwala aka kamachepetsa mphamvu yonse yoyambitsa ya urethane gelling reaction. Kugwirizana kwa ma electron a nayitrogeni kumathandizira kuwonjezera hydroxyl popanda kuyambitsa kukula mwachangu komanso kosalamulirika.

Malo osungiramo amine a tertiary amagwira ntchito ngati maziko olimba a Lewis panthawi ya polymerization. Kuyang'ana kwa malo a methyl substituents kumalola mwayi wopezeka mosavuta ku mitundu yachilengedwe yogwirizana. Kakonzedwe ka malo kameneka kamathandizira kuchuluka kwa kusintha kwa mowa kwachiwiri popanda kusokoneza nthawi ya kirimu wosakaniza wamadzimadzi. Chifukwa chake, kupangika kwa netiweki ya urethane kumachitika bwino kuyambira pamene madzi oyamba kuthiridwa kudzera mu kuchotsedwa kwa nkhungu komaliza.

Akatswiri opanga njira amagwiritsa ntchito njira imeneyi yoyendetsera ntchito kuti akonze njira zamakono zopangira zinthu. Mphamvu yoyambira yopangira zinthu imawonjezera kuchuluka kwa ma elekitironi am'deralo kuzungulira malo omwe akugwira ntchito. Mphamvu yamagetsi iyi imalimbikitsa kuchira kwa khungu pamwamba pa zinthu za polyurethane zowumbidwa. Kuphatikiza apo, mphamvu ya molekyulu ya steric imakhazikika pakulekanitsa magawo panthawi yokulitsa netiweki ya polymer. Mphamvu ya steric iyi yokhazikika imawongolera kuchulukana kwa ma crosslinking panthawi yonse yochira. Mphamvu yophatikizana iyi yolumikizirana imatsimikizira kuchulukana kwapakati kokhazikika, mawonekedwe abwino kwambiri, komanso kutha kosalala kwa pamwamba. Ma formulators amapeza zabwino zogwirira ntchito kudzera mu ma profiles ochiritsira odziwikiratu komanso machitidwe olamulidwa a reaction exotherm. Gawo lililonse loyamba la reaction limapindula ndi dongosolo la tertiary amine catalyst.

Kugwiritsa Ntchito Polyurethane Formulation

Kupanga kwa polyurethane kumadalira kwambiri zowonjezera za mankhwala kuti ziwongolere mawonekedwe a zinthuzo.MOFAN TMEDAimagwira ntchito ngati chothandizira cha amine chapamwamba kwambiri pa ntchito zosiyanasiyana zopangira. Mbiri yake yolinganiza bwino imathandizira machitidwe osiyanasiyana a thovu la polyurethane, kuphatikiza thovu lofewa, thovu lolimba pang'ono, ndi thovu lolimba la polyurethane. Machitidwe amadzimadzi amapindula kwambiri ndi kayendedwe kabwino ka kayendedwe ka madzi panthawi yokonza. Kapangidwe ka amine kogwira ntchito ka chowonjezerachi kamathandizira kuchira pamwamba popanda kuwononga maselo msanga. Opanga ma formula amagwiritsa ntchito makhalidwe a mankhwala awa m'makampani opanga mankhwala padziko lonse lapansi kuti akonze bwino ntchito yonse ya dongosolo. Kulinganiza koyenera pakati pa njira zochitira zinthu kumapereka mawonekedwe ofanana a thupi pakupanga kulikonse kwa thovu. Magulu aukadaulo amadalira chothandizirachi kuti chikhalebe ndi kuchulukana kofanana nthawi yonse yopanga.

Machitidwe Olimba a Thovu Olimba Komanso Osalimba

Mafakitale amasankha zinthu zapadera zopukutira ndi zopaka utoto kuti akwaniritse zolinga zolimba. Mu mafoam olimba a polyurethane, mapangidwe a thovu lamphamvu kwambiri amafunika kukula kwa maselo ofanana. Mafakitale amapanga njira zopangira kuti aphatikizepo amine yapaderayi kuti akwaniritse mawonekedwe a thovu. Chowonjezerachi chimalimbikitsa kupanga khungu mwachangu pamakoma akunja a nkhungu. Chigoba cha khungu chomwe chimachira mwachangu chimatseka bwino pakati pa madzi omwe akukulirakulira. Chifukwa chake, mapanelo okonzedwa amakhala ndi mawonekedwe abwino komanso malo oyera.

Akatswiri opanga njira amagwiritsa ntchito njira zopangira zinthu mwamakonda kuti akhazikitse makina olimba pang'ono. Ziwalo zamkati mwa magalimoto, monga zopumira manja ndi ma dashboard, zimafuna mawonekedwe osalala a khungu pamwamba pa minyewa yolimba. Kapangidwe ka tertiary amine kogwira ntchito kamathandizira kulumikizana kwa malo amodzi. Kachitidwe ka malo amodzi kameneka kamapanga khungu lolimba pomwe kamasunga mawonekedwe amkati. Kuphatikiza apo, makina ofewa a thovu la thermoplastic amapeza maubwino apadera amakina. Mphamvu yolinganiza bwino yothandiza imaletsa mabowo a pamwamba, ndikupanga mawonekedwe ofanana a thovu pa nkhungu zovuta za geometric. Ma formulators amakonza njira iliyonse ya polyurethane kuti awonjezere magwiridwe antchito odzaza nkhungu ndikuchepetsa kuchuluka kwa zinyalala. Akatswiri opanga njira amawona zabwino zosiyanasiyana zogwirira ntchito popanga zinthu zambiri panthawi yopanga mwachangu, ndikuwonetsetsa kuti kupanga kubwerezabwereza kumakhala bwino.

Kugwiritsa Ntchito Kothandiza ndi MOFAN 33LV

Mainjiniya nthawi zambiri amaphatikiza ma catalyst achiwiri kuti akonze bwino magawo ogwiritsira ntchito. Kuphatikiza catalyst iyi pamodzi ndi MOFAN 33LV kumapanga njira yamphamvu yothandizirana. MOFAN 33LV imapereka mphamvu yamphamvu yopangira gelling kudzera mu triethylenediamine mu dipropylene glycol. Mphamvu ya steric ya tertiary amine imakonza kinetics yoyambirira. Njira yopangira ma catalyst awiriwa imakwaniritsa mawonekedwe abwino kwambiri a thovu ndikufupikitsa nthawi yogwira ntchito kwambiri. Kuyeza molondola kumatsimikizira mgwirizano wabwino kwambiri panthawi yonse yokweza thovu.

Dongosolo lophatikizana la catalyst limasinthira mawonekedwe a maselo mu thovu losinthasintha la polyurethane. Mawindo ang'onoang'ono, ofanana kwambiri amapangidwa panthawi yoyambirira ya kirimu ndi gel. Kapangidwe kokhazikika kameneka kamawonjezera mphamvu yonyamula katundu pomwe kamachepetsa zoopsa za kuchepa. Ogwira ntchito m'mafakitale amawona ma curve osalala panthawi yopanga zinthu zazikulu. Kuphatikiza apo, ntchito zosiyanasiyana zimafalikira m'mafakitale osagwiritsa ntchito thovu. Mankhwalawa amagwira ntchito ngati accelerator yogwira ntchito kwambiri m'makina otsika kutentha a epoxy-amine. Kupanga elastomer kumapindula ndi kukula kwa netiweki ya polima yodziwikiratu. Zomatira za polyurethane matabwa zochiritsa mwachangu zimagwiritsanso ntchito kapangidwe kapadera ka amine kuti zifulumizitse mapangidwe a bond pansi pa mikhalidwe yozungulira. Opanga mankhwala amasintha njira zopangira izi kuti akwaniritse zofunikira zosinthira m'mafakitale osiyanasiyana, zomwe zimapangitsa kuti pakhale zatsopano.

Ubwino Wokonza ndi Malangizo Osungira

Kukonza Kapangidwe ka Maselo a Thovu

MOFAN TMEDA imakonza kapangidwe ka thovu la microcellular panthawi yokonza polyurethane. Chothandizira cha amine chogwira ntchito chimapereka mphamvu yokhazikika pa thovu la mpweya mkati mwa matrix yamadzimadzi a polyurethane omwe akukulirakulira. Kusakaniza kumachitika bwino popanda kugwa kwa thovu msanga kapena kutayika kwa mpweya. Izi zimapangitsa kuti maselo ang'onoang'ono, ofanana, azikulu pakati pa zinthu zomalizidwa za thovu. Kuyesa kapangidwe ka dongosolo kumatsimikizira kuti zinthuzo zimakhala zabwino nthawi zonse, zomwe zimathandiza opanga mapangidwe kukhala ndi mawonekedwe abwino a thovu popanda zolakwika pakhungu. Akatswiri opanga njira amadalira njira yolinganizayi kuti akonze bwino kulumikizana kwa maselo m'mizere ya thovu yolemera kwambiri.

Kusankha bwino kwa catalyst kumapereka ubwino waukulu pakupanga thovu lolimba. Kapangidwe ka selo kofanana kamawonjezera mphamvu zotetezera kutentha komanso mphamvu zonse zakuthupi. Komabe, mlingo wosayenera umabweretsa zovuta zosiyanasiyana pakupanga. Kukweza kwambiri kumathandizira kukula kwa maselo mofulumira kwambiri, kusokoneza kapangidwe ka mamolekyu ndikupanga kufooka kwapakati. Izi zimapangitsa kuti kutentha kukhale koyenera komanso zovuta pa kapangidwe ka thovu lalikulu. Magulu opanga polyurethane amasintha milingo yokweza mosamala kuti asunge mawonekedwe abwino ochiritsira.

Chitetezo, Kusamalira, ndi Kupaka Mapaketi

Ogwira ntchito m'mafakitale ayenera kutsatira malamulo okhwima okhudza chilengedwe ndi chitetezo panthawi yokonza mankhwala. MOFAN TMEDA imasonyeza makhalidwe apadera omwe amafunikira njira zodzitetezera. Ogwira ntchito ayenera kuyang'anira chinyezi ndi kutentha kwa chilengedwe m'malo osungiramo zinthu. Kusamalira bwino chilengedwe kumateteza kuyera kwa amine yogwira ntchito ku kuwonongeka kwa chinyezi m'malo ozungulira.

Chitetezo chogwira ntchito mosamala chimateteza kuvulala kuntchito mozungulira zidebe zamadzimadzi zotseguka. Kutayikira kwamadzimadzi kumabweretsa zoopsa zazikulu zachitetezo pafupi ndi malo otentha kwambiri kapena zida zamagetsi. Magulu a fakitale ayenera kusunga zidebe zotsekedwa m'malo ozizira, ouma, komanso opumira mpweya. Kapangidwe ka zidebe zosungidwa kayenera kukhala kutali ndi kutentha, chinyezi, malo osasunthika, ndi asidi amphamvu. Zosankha zodziwika bwino zamalonda zimaphatikizapo ng'oma zachitsulo zolemera makilogalamu 160 kapena ma CD okonzedwa mwamakonda malinga ndi zofunikira za makasitomala pazinthu zamafakitale.

MOFAN TMEDAImagwira ntchito ngati chothandizira cha tertiary amine chokhazikika cha machitidwe osiyanasiyana a thovu la polyurethane. Makhalidwe ake a mankhwala amalimbikitsa chitukuko cha khungu losalala komanso kukonza bwino madzi m'mafakitale osiyanasiyana. Ogwira ntchito m'mafakitale ayenera kusunga njira zodzitetezera zolimba chifukwa cha mawonekedwe ake a Class 3 omwe amatha kuyaka. Njira zoyenera zogwirira ntchito komanso kuchuluka kolondola kwa ma catalyst loading zimateteza kukhazikika kwa thovu panthawi yopanga. Mainjiniya a mankhwala amapeza zabwino zapadera pogwiritsira ntchito MOFAN TMEDA mu njira zopangira mwamakonda. Chothandizira ichi choyera kwambiri chimapereka kuwongolera kodalirika kwa kinetic panthawi yovuta yochiritsa. Ma formulators amapeza ntchito yabwino kwambiri pophatikiza chowonjezera ichi pamodzi ndi MOFAN 33LV kuti apange mizere yambiri ya thovu la polyurethane.

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