polyurethane Full yeedhay polyurethane, waa kooxaha urethane wadajir celiyaan (NHCOO) xarunta macromolecular kooban ee silsilad ugu weyn. Waxaa la sameeyey ka diisocyanate ah organic ama xarunta polyisocyanate leh laba ama wax ka badan polyaddition hydroxyl. Kuwa soo socda formula falcelin: -N = C = O + wajaho → -NH-COO-, marka lagu daro carbamate polyurethane macromolecule ah, sidoo kale jiri kara ether, Ester, HOL, biuret, allophanate, iwm kooxaha.
(Cyanate
Description: HOC≡N (n) HN cyanate = C = O (isocyanate) ayaa ah (positive) cyanate iyo isocyanate laba nooc. acid The free waa isku dar ah ee labada, ma furitaanka soociddiisa, laakiin esters ay yihiin laba nooc. Cyanate waa dareere kacsan iyo xoqe. Waxaa jira ur xoog leh oo acetic acid. Mugga 1.14. Karkaraya dhibic 23.6 ℃. Muuji ashitada xoog in xal aqueous. Deganayn, si fudud polymerization. Ammonia iyo carbon dioxide ahaan inta lagu jiro hydrolysis. Marka guud ahaan carbamates iyo alcohols door. (N) ROC≡N isocyanate polymerization fudud, oo u nugul hydrolysis, helay qaab saafi adag. Isocyanate RN = C = O ama O = C = NRN = C = O, ur guud ahaan xun oo dareere ah. Cyanate acid cyanuric la diyaarin karaa by kala daatay kaamerada. )
sameeyaan waxyaabaha polyurethane jilicsan, semi-adag oo adag wiilku afkuu, elastomers, rinjiga, adhesives, dawaayn, dardaro Beeyada daahan maqaar, fiiloyin elastomeric, si ballaaran loo isticmaalo wax soo saarka baabuurta, warshadaha qaboojiyaha, gaadiidka, dhismaha injineernimada sokeeye, kabaha, maqaar dardaro, dharka, mishiino, kiimikada, mashiinada macdanta, aerospace, caafimaadka, beeraha iyo beeraha kale oo badan.
Iyadoo ku xiran alaabta ceeriin kala duwan, waxay yeelan karaan noocyada kala duwan ee wax soo saarka, guud ahaan laba nooc oo caag, polyether. polyurethane Polyether inta badan waa wax polyurethane diyaarinta qeexay for polyol, polyol polyurethane in la diyaariyo oo gebi ahaanba ka polyol polyether ama aqlabiyadda hanti nidaamka ah.
polyols Polyether in qaab dhismeedka kelli, bond ether tamarta midaysan waa yar yahay, oo ay fududahay in la isku shaandheyn, sidaas awgeed waa wax wanaagsan low-kulka polyurethane diyaariyey by ay qaab jilcincy, iska caabin hydrolysis fiican, inkastoo aan sida ugu fiican ee guryaha farsamo of caag polyurethane, laakiin ku nafwaayay ku yar qalabka, qayb lagu daro miscible fudud iyo isocyanate, waxqabadka processing aad u fiican.
polyols Polyester guud ahaan loo gudbiyaa by acid ah dicarboxylic la tones iyo polyol kale caag by reaction uumiga. Si guud haddii ay ku jiraan group Ester (qaboobaan) ama koox carbonate (OCOO) polyol ah. afkuu ka polyurethane hubkaas ayaa loo isticmaalaa. xumbo jilicsan ayaa inta badan loo isticmaalo alaabta iyo gaadiidka ka mid ah maaddooyinka kala duwan derin, qalabka madhxiya; ningax xumbo adag waxaa inta badan loo isticmaalaa qalabka guriga, derbiga guryaha xireyaashaba ningax xumbo buufiyo, qalabka madhxiya biibiile, darfaha dhismaha, baabuur qaboojiye iyo ningax kaydinta qabow iyo waxyaabo kale; xumbo semi-adag loo isticmaalo darfaha qalab baabuurta, isteerinka iyo wixii la mid ah. Suuqa ayaa noocyo kala duwan oo caddaymaha isku darka xumbo polyurethane qalabka (Premix laba-qayb), inta badan ee (daawo qabow) wiilku afkuu ka adkeysiga sare, wiilku afkuu semi-adag, ridaya oo ku xereen caag xumbo adag.
(Preservative ether
1. Marka dar ah ee ethanol iyo xoog sulfuric acid waxaa kululeeyo 140 ℃ intermolecular kartaa alaabta fuuq la ether. acid sulfuric xoog sida wakiilka ah dehydrating meesha Hannaan ah.
2. Nidaamka isla'egta: 2 CH3-CH2-OH - catalyzed iyo urursan H2SO4 → 140 ℃ CH3-CH2-O-CH2-CH3 + H2O)
elastomer polyurethane
elastomer polyurethane waa wax kooban polyurethane of noocyo kala duwan oo ah, sababta oo ah qaab-dhismeedka la jilicsan iyo mid adag labada qaybaha, loo qaabeeyay kartaa siiyo wax kelli isagoo xoogga sare, qalleyf, xirtaan iska caabin ah, iska caabin ah oo saliid, qaab aad u fiican, labada la caag isagoo sare barti iyo rigidity of caag ah, loo yaqaan "xirtaan u adkaysta caag."
elastomer polyurethane hadda isticmaali kartaa mastication caag caadiga ah la mid, la isku qasin, Asagoo arigtadaa habka wax taaj oo kale (tixraac MPU); Waxa kale oo la sameeyey caaga dareere ah, wax taaj oo kale ama ku xereen, loo shubay, wax taaj oo kale culus (tixraac processor) tuuray; sidoo kale waxaa la diyaarin karaa kaabsal, iyo, sida caadiga ah caag ah, duray, extrusion, calendering, wax taaj oo kale dhabar jab iyo geedi socodka kale (ee processor). Wax taaj oo kale ah ama qaybo duro doorsoon, gudahood kala duwan oo qaarkood qalbi engegnaantiinna aawadeed, laakiin sidoo kale waa la jari karaa, shiidi doona, qodista iyo machining kale. Processing kala duwan, elastomer polyurethane applicability aad u balaadhan oo ay, codsiyada sii si loo ballaariyo.
caabin Oil, iska caabin Allena, iska caabin gaboobaya, caabiga shucaaca, heerkulka hooseeyo, hufan wanaagsan dhawaaqa, Amda xoog, biocompatibility fiican oo waafaqsan dhiigga. Faa'iidooyinka Kuwanu waa elastomer polyurethane ka ballaaran loo isticmaalo in military, aerospace, codka, bayoolaji iyo sababo kale.
Faa'iidada ugu weyn ee elastomer polyurethane:
1, waxqabadka kala duwan ee laysku hagaajin karo. Tiro ka mid ah tilmaamayaasha jirka iyo farsamo waxqabadka laga beddeli karaa by doorashada ee alaabta ceeriin iyo daawooyinka, gudahood kala duwan oo gaar ah, si loo buuxiyo shuruudaha kala duwan ee wax soo saarka qaab. Sida qalbi engegnaantooda aawadeed, inta badan waa tilmaame muhiim ah oo isticmaala alaabta ee, labadaba laga sameeyey elastomer polyurethane Shore engegnaantiinna A of 20 ama si rollers daabacaadda jilicsan, laakiin sidoo kale ka dhigay in ka badan 70 Shore D engegnaantiinna aawadeed caag adag rogid duuban, tani waa elastomeric guud wax adag tahay in la sameeyo. elastomer polyurethane waa wax polymer kala horjeeda oo ka kooban qaybaha kala badan iyo qaybaha adag ka kooban silsilad dabacsan, la horumar iyo kordhinta ee kooxda cufnaanta saamiga qeybta adag kala horjeeda ee xoogga asalka elastomer iyo qalbi engegnaantooda sida la kordhin doonaa.
2, iska caabin ah ay xirtaan ka xoogbadan. Gaar ahaan marka ay jirto biyo, saliid qoynta xaalado shaqo oo jira dhexdhexaad ah, iska caabin Duugga ah inta badan waa dhowr jeer in ay dhowr jeer qalabka caag caadiga ah. qalabka macdan ah sida bir, inkasta oo aad u adag, laakiin daruuri ma aha xirto, sida meelaha waraabka bamka badan oo River Yellow ah, giraanta qaybaha ilaalinta overcurrent iyo afka bir giraanta ka dib markii badan oo nabaad faar, ma qaadan boqolaal saacadood si aad u daran xirtaan baxsiga, halka isticmaalka elastomer polyurethane dahaarka giraanta afka iyo ilaalinta giraanta waa hawlgal joogto ah 1800 yar yar ah, weli xiran. Qaar kale, sida mishiinka axdi qarameedka bariis caag isticmaalo hulling duuban, birqaya shaandho screen Dhuxul Diyaarinta iyo runway stadium track, shaabadood saliid firfircoon isticmaalo wheel iyo rullaluistemadka wheel shaagagga leh wiish wiish forklift, iwm ayaa sidoo kale elastomer polyurethane Waxaa imanaya. In ay marjac tani waa loo baahan yahay si loo horumariyo Wehliyaha ee khilaaf ah xubin low-darantahay ingeega, elastomer polyurethane ah, si loo hagaajiyo xirtaan iska caabin hoos dhalista load, waxaad ku dari kartaa qadar yar oo ah disulfide aluminium, graphite ama saliid silicone in sida elastomer polyurethane ah, iwm jilciyaha.
waqti Post: Nov-24-2018