Feletseng kettle bitsoa kettle, ke sehlopha se bale lihlopha urethane (NHCOO) macromolecular komponeng e nang le ka ketane e khōlō. E e etswa ho tswa ho diisocyanate e manyolo kapa polyisocyanate komponeng le pedi kapa ho feta hydroxyl polyaddition. Ba itšoara joang moralo o latelang: -N = C = O + HO- → -NH-COO-, ho phaella ho kettle molecule carbamate, ka boela ba le phenylate, Ester, urea, biuret, allophanate, joalo-joalo lihlopha.
(Cyanate
Tlhaloso: HOC≡N (n g) cyanate hn = C = O (isocyanate) e na le (positive,) cyanate le mefuta isocyanate tse peli. The acid e lokolohile ke motsoako oa bobeli, ha ho arohana qalang, empa esters lona ke mefuta e 'meli. Cyanate ke ho hloka botsitso 'me e senyang sephalli. Ho na le monko o matla oa asiti acetic. Segokanyipalo 1.14 kopanya. A phehile ntlha 23,6 ℃. Bontša acidity matla ka tharollo ea metsi. Sa tsitsang, habonolo molekyler. Ammonia le carbon dioxide generated nakong hydrolysis. Ha generating carbamates le alcohols phetha karolo. (N) isocyanate ROC≡N molekyler bonolo, le bonolo hore hydrolysis, ile a fumana foromo e hloekileng thata. Isocyanate RN = C = O kapa O = C = NRN = C = O, ka kakaretso sa thabiseng monko ka mokelikeli ka. Cyanate acid e cyanuric ka lokisitsoeng ke li bole kapele 'mogote. )
Kettle lihlahisoa theha bonolo, seka-thata le thata foams, elastomers, pente, likhomaretsi, sealants, a maiketsetso a letlalo barbotage halogenated, elastomeric likhoele, ho pharaletseng sebelisoa ka ho etsa thepa koloi, sehatsetsi difeme, lipalangoang, kaho ea lehae le boenjiniere, lieta, letlalo a maiketsetso, Textile, mechine, peterolo, mechine meepo, Aerospace, bongaka, temo le likarolong tse ling tse ngata.
Ho itšetlehile ka thepa e fapaneng e tala, ka ho ba le mefuta e fapaneng ya dihlahiswa, ka kakaretso mefuta e 'meli ea poliester le polyether. Polyether kettle ke haholo-holo kettle lintho tse bonahalang ho lokisetsa ho hlalositswe ho polyol, e polyol kettle e lokiselitsoeng ka ho feletseng ho tswa ho polyol polyether kapa boholo ba lefa tsamaiso.
Polyether polyols ka sebopeho sa limolek'hule, e phenylate tlamo e khokahano eneji, le e tlaase, ho le bonolo ho potoloha, kahoo, ho ke tse ntle tlaase mocheso kettle tse bonahalang lokisitsoeng ke tshebetso lona tenyetseha, e babatsehang hydrolysis hanyetsa, le hoja e se e le e ntle e le thepa ea ho phetha molao feela oa poliester kettle, empa tlase e tiileng e qamathelang thepa, bonolo le isocyanate karolo miscible additives, e babatsehang sebetsa tshebetso.
polyols poliester ba ka kakaretso ile a bua ka ke acid e sa dicarboxylic le glycol le tse ling tse poliester polyol ke condensation itšoara joang. Emela nang Ester sehlopha (COO) kapa carbonate sehlopha (OCOO) polyol. Kettle foams ba ho pharaletseng sebelisoa. Bonolo bubble e haholo-holo sebelisoa bakeng sa thepa ea ka tlung 'me likoloi tsa thepa e sa tšoaneng moseme, thepa e kwahelang; tenyetseheng bubble kwahelang e haholo-holo sebelisoa bakeng sa lisebelisoa ka tlung, matlo leboteng metsi ho spray bubble kwahelang, thepa phala kwahelang, diphanele ea ho haha, literaka refrigerated le batang poloko e kwahelang le thepa e 'ngoe; seka-thata bubble sebelisoa ka diphanele likoloi seletsa, ba lebidi la setereng joalo joalo. 'maraka o na le mefuta e fapaneng ya tobileng bakeng sa kettle bubble motswako ea thepa (tse peli tse-karolo premix), haholo-holo bakeng sa (batang pheko) phahameng boitharabologelo foams, foams seka-thata, lahla' me fafatsa ka thata bubble polasetiki.
(Diethyl phenylate
1. Ha motsoako oa ethanol 'me ho ikakhela ka acid e sulfuric ile halefile ho 140 ℃ ka intermolecular lihlahisoa dehydration le phenylate. asiti khobokellane sulfuric ka moemeli ke metsi mmeleng moo sethothetsi.
2. abel: 2 CH3-CH2-OH - catalyzed le concentrated H2SO4 → ka 140 ℃ CH3-CH2-O-CH2-CH3 + H2O)
kettle elastomer
Kettle elastomer ke kettle le likarolo tse ngata tse bonahalang tse tse fapa-fapaneng ka, ka lebaka la sebopeho lona le likarolo tse peli tse bonolo 'me ka thata, ka etselitsoe ho fana ka lintho tse bonahalang ea limolek'hule ho ba le matla a phahameng, toughness, apara ho hanyetsa, ho hanyetsa oli, tshebetso babatsehang, ka bobeli le rabara le phahameng elasticity le tenyetsehe tsa polasetiki, e bitsoang "apara manganga rabara."
Kettle elastomer hona joale a ka sebelisa e tšoanang kakaretso rabara mastication, ho kopanya, phekola thulaganyou e bōpa (fetisetsa MPU); Hape ho entsoe ka rabara mokelikeli, tse entsoeng bōpa kapa fafatsa, ho betsa, centrifugal bōpa (bua ka CPU); ka boela ka lokisoa ka Pellets, 'me, ho tšoana le ba tloaelehileng polasetiki, ente, extrusion, calendering, bōpa bohloko le dithulaganyo tse ling (ba CPU). Bōpa kapa ente bōptjoa likarolo, ka hare ho e mengata e fapaneng ea itseng oa thatafala, empa hape a ka ho khaola, ho sila, ho cheka le machining tse ling. Processing oa ho fapafapana, e kettle elastomer lohle haholo bomaleba, dikopo tsoela pele ho atolosa.
Oli hanyetsa, ozone hanyetsa, ba seng ba hōlile ho hanyetsa, mahlaseli a hanyetsa, le tlaase mocheso, e sebeletsang pepeneneng a utloahalang a molemo, mamarello matla, biocompatibility babatsehang le sebeletsana mali. melemo ena ke kettle elastomer ho pharaletseng sebelisoa ka sesole, Aerospace, acoustics, ea baeloji 'me mabaka a mang.
Ka ba molemo e ka sehloohong ea kettle elastomer:
1, le tshebetso ya mefuta e fapaneng fetolehang. ba bangata ba 'mele le ho phetha molao feela le litsupa tshebetso ka fetola ka ho tlhopho ya lihlahisoa tse tala le formulations, ka hare ho e mengata e fapaneng tse ling, ho ea kopana le ditlhoko tse fapaneng bakeng sa ho tshebetso sehlahisoa. Tse kang thatafala, hangata e pontshi bohlokoa tsa basebelisi ba sehlahisoa, ea entsoeng ka kettle elastomer Shore A thatafala la 20 kapa joalo rollers bonolo khatiso, empa ile a boela a fetang 70 Shore D thatafala ba thata rabara rolara phikolosetsa, sena ke elastomeric kakaretso lintho tse bonahalang ho le thata ho li etsa. Kettle elastomer ke Polar polymer tse bonahalang entsoe ka likarolo tse ngata le likarolo thata entsoe ka ketane tenyetsehang, le ntlafatso le keketseho ea polar sehlopha segokanyipalo thata karolo palo ea matla elastomer pele le thatafala tla eketseha e loketseng.
2, phahametse qhoaele hanyetsa. Haholo-holo moo ho nang le metsi, oli wetting mahareng maemo o teng ho sebetsa, ho apara liaparo tsa ho hanyetsa hangata makhetlo a 'maloa ho isa linakong tse' maloa le tloaelehileng thepa rabara. thepa Metallic kang tšepe, le hoja ka thata haholo, empa se hakaalo hore e se aparang, tse kang kgolo pompo nosetso sebakeng sa Nōka Yellow, ho overcurrent tšireletso ea dikarolo 'me molomo oa tšepe lesale lesale mora e ngata khoholeho ea mobu magweregwere, ha nka makholo a lihora tse ngata ho tse matla apara dutla, ha ho sebelisoa ha kettle elastomer tlotsitsoeng molomo lesale le lesale ho itšireletsa ka ho tsoelang pele tshebetso 1800 hore e be tse nyenyane-s'o apara'ng. Batho ba bang, jwalo ka raese siloa sebediswa rabara rolara hulling mochini, temoso ya skrine sefe mashala itokisa le pineng e lebala leo la lipapali runway, matla litiiso oli sebediswa sewa Crane lifte lebili le lebili rolara skates, joalo-joalo boetse ho na le kettle elastomer Ho kena. Ka ntlha ena ya referense ke hlokahala ho ntlafatsa coefficient ea khohlano ea tlaase thatafala kettle elastomer setho, ho ntlafatsa apara ho hanyetsa tlas'a behang mojaro, o ka eketsa e nyenyane ea aluminium disulfide, graphite kapa oli silicone joalo kettle elastomer, joalo-joalo selogetsi.
Post nako: Nov-24-2018