Tilmaamaha iyo codsiyada
Chloroprene caag (CR) waa alaabta ugu weyn ee ceeriin ee koollada chloroprene, koollada si qabow lagu daweyn karaa heerkulka qolka, xoogga koollada bilowga ah waa mid aad u weyn, xoogga aasaaska ah ee degdeg ah, xoog isku xidhka sare, waxqabadka guud heer sare ah, isticmaalka tiro balaadhan oo ah codsiyada, awood u xidhi caag, maqaar, dhar, maqaar, warqado, balaastikada kale, alwaax, alwaax, alwaax kale Xabagta caagga ah ee chloroprene sidoo kale waxaa loo yaqaannaa. Xabagta caagga ah ee Neoprene waxay leedahay dareere-ku-saleysan, nooca emulsion iyo nooca dareeraha aan dareeraha lahayn, dareeraha-ku-saleysan wuxuu u qaybsan yahay nooc isku-dhafan iyo nooca tallaalka. Isku darka waxaa ka mid ah xabagta CR saafiga ah iyo xabagta CR oo ay ku jiraan buuxinyaal, iyo sidoo kale xabagyada CR-ga oo la beddelay. Nooca Graft waa caag neoprene iyo methyl methacrylate iyo xal monomer kale copolymerization ee koollada. Waqtigan xaadirka ah, koolada neoprene-ku-salaysan ee dareeraha ah ayaa weli ah midka ugu badan ee loo isticmaalo, tallaabooyin waa in la qaadaa si loo yareeyo wasakhowga sunta ah, iyada oo la raacayo shuruudaha deegaanka.
Marka hore, xabagta caagga ah ee nooca neoprene ee isku dhafan
Isku darka xabagta neoprene waxay ka dhigan tahay in caag neoprene ah oo la qaso (ama aan la qasin) lagu milmo isku-dar ah dareerayaasha, ku dar resins, antioxidants, buuxinta iyo waxyaabo kale oo lagu daro.
Wakiilka gabowga, buuxinta iyo waxyaabo kale oo lagu daro koollo ku salaysan hal qayb ama laba ka kooban.
1. Astaamaha
(1), xoogga xabagta ee bilowga ah, caag neoprene waa sahlan tahay in la miireeyo, daahan koollada ah iyo isugaynta qalajinta, waxay noqon kartaa crystallization degdeg ah oo lagu daray
Tackifier resin, oo muujinaya xoog weyn oo xabagta bilowga ah. (2), xoogga aasaasida degdega ah, xabagta neoprene waxay ku tiirsan yihiin crystallization iyaga u gaar ah iyo daawaynta, xawaaraha crystallization CR, isku xidhka isla markiiba ka dib curaarta uu leeyahay xoog isku xidhka ku filan. (3), xoogga isku xidhka sare, crystallinity sare ee caag neoprene, xoogga isku xidhka, iyo sidaas darteed xoogga isku xidhka sare ee koollada CR. (4), caabbinta warbaahinta wanaagsan, caabbinta saliidda, caabbinta biyaha, caabbinta kiimikada wanaagsan. (5) Lakabka koollada ayaa jilicsan, dabacsanaan ah oo adkaysi u leh shoogga iyo gariirka. (6), adkeysiga wanaagsan, caabbinta iftiinka aadka u fiican, caabbinta ozone, caabbinta duqnimada atmospheric, olol dib u celi. Isku xidhka caagga iyo birta gudaha gudaha 20 sano ka dib xoogga isku xidhka ku dhawaad ma hoos u dhaco. (7), isticmaalka ballaaran ee isticmaalka, biraha iyo qalabka aan biraha ahayn waxay leeyihiin dhejis wanaagsan, gaar ahaan qalabka kala duwan ee midba midka kale ku xiran, dhejisyada kale ee caag-ku-salaysan lama barbar dhigi karo. (8), fududahay in la isticmaalo, ka dib markii la qalajiyo xabagta, mar xiriirka, isku xirnaanta degdega ah iyada oo aan cadaadis dheereyn, waxaa lagu daweyn karaa heerkulka dibadda. (9), caabbinta kulaylka liidata, iska caabin qabow ma fiicna. (10), inta badan xabagta neoprene-ku-salaysan ee dareeraha ah waxay leedahay heer gaar ah oo sun ah iyo wasakh.
Xabagta neoprene ee isku-dhafan waa dhejis la taaban karo, oo si ballaaran loogu isticmaalo wax soo saarka warshadaha iyo nolol maalmeedka. Gaar ahaan Waxaa si weyn loogu isticmaalaa wax soo saarka warshadaha iyo nolol maalmeedka, gaar ahaan samaynta kabaha, alaabta guriga, dhismaha, baabuurta iyo warshadaha kale oo aad u badan.
2.Abuuritaanka
Isku dhafka neoprene wuxuu ka kooban yahay caag neoprene, resin tackifying, oksaydhyada birta, dareerayaasha, antioxidants, buuxinayaasha, dardar-geliyayaasha,
Wakiilka crosslinking iyo wixii la mid ah.
I. Chloroprene caag
Chloroprene caag, oo sidoo kale loo yaqaan polychloroprene, waa 2-chloro-1,3 butadiene oo ah alaabta ceeriin ee ugu weyn ee emulsion polymerization waxayna soo saartay nooc elastomer ah.
Elastomer Caag chloroprene waa jajab cad ama jaalle ah ama adag oo adag, oo leh crystallinity la beddeli karo, ku dheggan wanaagsan, xoogga adag ee sare iyo dhererka. Gabow heer sare ah, kulayl, saliid iyo caabbinta kiimikada. Iska caabinta cimilada iyo iska caabbinta gabowga ozone ayaa ah kan labaad ee kaliya ee caagga ethylene propylene iyo caagga butyl. Iska caabinta kulaylka iyo caag nitrile ah. Iska caabbinta wanaagsan ee inorganic acid iyo daxalka alkali. Leh heer go'an oo dib u dhac olol ah. Waxoogaa ka sii daran iska caabbinta kulaylka, dahaarka korantada ma fiicna.
2, wax ka qabashada xabagta
Xabagta tackifier waa qayb muhiim ah oo ka mid ah xabagta neoprene ee ku salaysan dareeraha, taas oo hagaajin karta xoogga isku dhafan, sifooyinka koollada, caabbinta kulaylka, caabbinta biyaha iyo caabbinta gabowga.
Galmada iyo iska caabinta gabowga. Xabagta tackifier ee loo isticmaalo waa resins alkyl phenolic kulayl-ku-jiid-celin ah, resins petroleum, resins terpene phenolic, resins terpene, resins phenolic rosin-la beddelay, resins gumarone, rosin esters, poly a-methylstyrene iyo wixii la mid ah. Waxaa ka mid ah, tert-butylphenol formaldehyde resin (2402 resin) ayaa leh saameynta ugu fiican. Xabagta tackifier ku dhawaad wax saamayn ah kuma laha crystallinity ee caagga neoprene. Xabagta Terpene phenolic waa xabagta heerkulbeegga aan falcelin lahayn waxay kordhin kartaa muddada xabagta, oo lakabka xabagta ka dhiga mid jilicsan.
Xabagta gumarone waxay sidoo kale siinaysaa koror yar xoogga curaarta xabagta neoprene. Chloroprene caag AF waa karboksilic acid CR, kaas oo la qaabeeyey xoogga isku xidhka koollada la aasaasay si degdeg ah iska caabin kulaylka, delamination sare, si kastaba ha ahaatee, ay sabab u tahay falcelintiisa, viscosity ee koollada ee habka kaydinta kici doonaa, taas oo ay sabab u tahay saamaynta crosslinking ee magnesium oxide. Sidaa darteed, in diyaarinta xabagta AF neoprene si aad u hesho xasilloonida viscosity ka wanaagsan iyo waxqabadka dhamaystiran waa in lagu daraa qadar ku filan oo ah 2402 xabagta, iyo magnesium oxide waa in la pre-reacted la xabagta si ay u abuuraan chelates ka hortagi kara oxide magnesium iyo hydroxyl falcelinta tooska ah iyo kordhinta xasiloonida viscosity iyo iska caabinta kulaylka ee nidaamka.
3, bir oxides
Okssaydhyada birta ee xabagta neoprene waxay leeyihiin afar door: nuuga aashitada, wakiilka anti-cuncunka, wakiilka vulcanizing, resin reactant. Waqti ka dib, caag neoprene ah ayaa sii deyn doona qaddarka raadadka hydrogen chloride, wuxuu kor u qaadi karaa burburka dheeraadka ah ee polymers, wuxuuna daxaleynayaa biraha iyo fiilooyinka dabiiciga ah, ku darida oxides birta waxay nuugi kartaa hydrogen chloride si looga fogaado hoos u dhaca sii socda. Okssaydhyada birta ah ee guud ahaan la isticmaalo waxay u badan yihiin zinc oxide iyo magnesium oxide. Magnesium oxide waxay leedahay shaqada nuugista aashitada, falcelinta ka hor, kahortaga gubashada, vulcanization, iwm. Waa qayb aan lagama maarmaanka u ah koollada neoprene. Magnesium oxide iyo resin pre-reaction waxay hagaajin kartaa caabbinta kulaylka xabagta waxayna ka hortagtaa roobka delamination, qiyaasta magnesium oxide ee saamaynta falcelinta ka hor iyo sifooyinka koollada ayaa saameyn ku leh, iyada oo qiyaasta magnesium oxide ay korodho, heerkulka sare ee heerkulka sare ayaa kordha, laakiin xasilloonida dareeraha koollada ayaa hoos u dhacaya. Ku darida magnesium oxide waxay si wax ku ool ah u dardargelin kartaa filimka dhejiska ah si ay u engegaan, waxayna si weyn u wanaajin kartaa xoogga curaarta bilowga ah, taas oo ay sabab u tahay iftiinka magnesium oxide ee calcined ama magnesium oxide firfircoon. Birta magnesium oxide waa budo amorphous cad, aan ur lahayn oo aan dhadhamin. Cufnaanta qaraabada 3. 58, barta dhalaalka 28520C, barta karkarinta 36000C ee hawadu waxay si tartiib tartiib ah u nuugi kartaa kaarboon laba ogsaydh iyo biyo si ay u abuurto aasaaska magnesium carbonate . Zinc oxide oo lagu daro koolada chloroprene waxay door ka ciyaari kartaa nuugista acid, laakiin taasi waa wakiilka vulcanizing maaha ujeedo sababtoo ah koollada chloroprene inta badan waa heerkulka dibadda iyadoo la isticmaalayo qabow sababtoo ah kiimikadu ma soo saari doonto vulcanization, laakiin sidoo kale kaydinta hoose ee roobka. Isla mar ahaantaana, zinc oxide waxay ka dhigi kartaa dareeraha xabagta inay noqdaan kuwo qallafsan, si markaa filimka koollada uu u dhejiyo, oo u muuqda mid qalalan oo aan qallajin, oo loo isticmaalo isku-xidhka xumbo polyurethane, zinc oxide ayaa kor u qaadi doonta gabowga walxaha. Iyada oo ku saleysan sababaha kor ku xusan waxay baabi'in kartaa zinc oxide dhab ahaantii, qalabka korantada shisheeye ee leh koollada CR kuma darin zinc oxide, koollada waa mid hufan oo aan lakab lahayn. Zinc oxide la'aanteed waxay sidoo kale gaari kartaa xoogga isku xirnaanta ee loo baahan yahay, laakiin sidoo kale si looga fogaado gubashada sifeynta xabagta, si looga hortago xabagta kaydinta muddada dheer.
Soo saar jel iyo roobab, oo ma keeni doonto kala goynta wejiga xabagta. Haddii isku-xidhka xabagta neoprene ee isticmaalka heerkulka sare, ku dar qadar yar (1 ~ 3 koobi) oo ah zinc oxide firfircoon oo ultra-fine ah ayaa faa'iido leh.
4, antioxidant
Si looga hortago burburka caagga, kor u qaadida caabbinta gabowga, sii kordhiso nolosha adeegga, si loo ilaaliyo cimri dhererka qaybaha isku xiran, waxaa lagama maarmaan ah in lagu daro antioxidant ku habboon. Saamaynta antioxidant D ee la isticmaalay aad bay u wanaagsan tahay laakiin wasakhaynta iyo kansarka waa in laga tago ODA, RD, 264, iwm. Antioxidant 2246 sidoo kale waa la isticmaali karaa, laakiin waxay soo saari doontaa ifafaale midab-doorasho, dareerayaasha koloriinku waa buluug khafiif ah, isbeddellada buluug iyo cagaarka ee cinjirka waa casaan.
5, dareere
Xabagta waa xabagta neoprene-ku-saleysan ee aan laga maarmi karin oo ka kooban qaybo badan, waxqabadka xabaggu wuxuu leeyahay saameyn muhiim ah. Chloroprene tirada solubility caag ah ee 9.2 ~ 9.4, milmi in benzene, toluene, dichloromethane, methylene chloride, chloride methylene, trichloromethane, 1, 1, 1-trichloroethane, carbon tetrachloride, trichlorethylene, butanone, iwm, incyclopeyl methyl. acetate, isopropyl acetate, acetone, aan milmi karin ee n-alkane, n-heptane, n-heptane, gaaska dareeraha, isopropanol iyo wixii la mid ah. Qallafiyeyaasha aan loo baahnayn iyo kuwa aan milmaha lahayn oo keliya maaha kuwo la kala diri karo caag neoprene, laakiin iyada oo loo marayo saamiga ku habboon ee isku-dhafka ayaa sidoo kale milmi kara caag neoprene ah. Solubility ee caag neoprene, viscosity koollo, xasiloonida viscosity, qoynta xabagta, muddada haynta viscosity, xoogga xabagta bilowga ah, xawaaraha qalajiyey, xoogga bond, xasilloonida kaydinta, caabbinta heerkulka hoose, ololka, qarxa, sunta, faddarayn, kharashka koollada, iwm ayaa saameyn weyn ku leh.
6, buuxinta
Buuxinta xabagta neoprene-ku-salaysan ee dareeraha ah looma isticmaalo wax badan, sababtoo ah qiyaasta dareeraha xabagta, maadada adag ee hooseeya, fududahay in la dedejiyo, ma ciyaari karo doorka la filayo. Haddii la isticmaalo kaalshiyam kaarboonaytka firfircoon ee superfine la isticmaalo, waxa laga yaabaa inay xasilloonaato. Iyo isticmaalka budada ultrafine talcum, ultrafine silica, ultrafine aluminium silicate, dhoobada ultrafine waxaa lagu hayn karaa oo keliya muddo gaaban oo xasilloon. Ugu dambeyntiina waxaa jiri doona roobab.
7, wakiilka iskutallaabta
Wakiilka Crosslinking, oo sidoo kale loo yaqaan wakiilka daweynta, wuxuu dardargelin karaa xawaaraha daaweynta ee xabagta caagga neoprene, hagaajinta xoogga isku xirnaanta, caabbinta kulaylka, caabbinta biyaha, caabbinta saliidda, caabbinta kiimikada, caabbinta gabowga. Wakiilada iskutallaabta ee inta badan loo isticmaalo polyisocyanate, sida tetraisocyanate. Wakiilka crosslinking Polyisocyanate oo leh falcelin sare, ku dar koolada chloroprene 2 ~ 3h waxay noqon kartaa jel isku dhafan, sida koolo laba qaybood ah, ka hor inta aan la isticmaalin, isku darka iyo isticmaal isla markiiba.
8, dardargeliyaha
Dhiirrigeliyaha waa in kor loo qaado vulcanization si loo hagaajiyo caabbinta kulaylka oo lagu daro walxaha, sida vinylthiourea (NA-22), diethylthiourea (DE-TU), diphenylthiourea (promoter C), diaminodiphenylmethane, qiyaasta guud ee 0.25 ~ 1 share. Dadka qaarkiis ee laga helo xabagta chloroprene iyaga oo ku daraya nooca BRN ee vulcanizing madow, waxay dedejin karaan vulcanization-ka, adhesion kama yaraa nidaamka vulcanization polyisocyanate iyo sunta si weyn ayaa loo yareeyaa.
