Polyether polyols, feem ntau hu ua polyether, yog synthesized los ntawm polymerization cov tshuaj tiv thaiv nrog ethylene oxide (EO), propylene oxide (PO), thiab cov pib xws li ethylene glycol, glycerol, pentaerythritol, thiab ethylenediamine (muaj active oxygen pawg) nyob rau hauv lub xub ntiag ntawm ib tug catalyst. . Lawv feem ntau yog ua kua nyob rau hauv chav tsev kub nrog qhov chaw txias txias thiab qhov kub thiab txias fluidity. Polyether polyols tsis muaj tshuaj lom lossis tsis muaj tshuaj lom, thiab qee yam tuaj yeem siv rau hauv kev lag luam tshuaj lossis zaub mov. Lawv yog ib qho ntawm cov khoom siv tseem ceeb hauv kev lag luam polyurethane.
Puas yog Polyether Polyol yog ib yam khoom phom sij?
Polyether polyols tsis suav hais tias yog cov khoom phom sij; lawv yog cov uas tsis yog-flammable thiab non-explosive khoom. Polyether (polyether polyol) yog ib qho tseem ceeb derivative ntawm propylene oxide thiab ib qho ntawm cov khoom siv tseem ceeb rau kev sib txuas ntawm polyurethane.
Polyether polyols feem ntau muaj toxicity tsawg thiab tsis ua rau tawv nqaij. Lawv tsis muaj teeb meem yog tias lawv nkag mus rau hauv qhov muag ncaj qha, txawm hais tias ntxuav nrog dej.
Kev ceev faj rau kev siv Polyether Polyols:
1. Kev tiv tauj ntawm daim tawv nqaij: Yog tias cov polyether polyols tuaj rau ntawm daim tawv nqaij, yaug kom huv si nrog dej kom ntau. Yog tias lawv nkag mus rau hauv qhov muag, yaug qhov muag nrog dej tsawg kawg 15 feeb.
2. Hygroscopicity: Polyether polyols yog hygroscopic, yog li tsis txhob sib cuag nrog huab cua.
3. Kev Txhaum Cai: Thaum muaj kev nchuav, ntxuav siv cov khoom nqus dej xws li sawdust lossis ntaub thiab yaug qhov chaw nrog dej ntau.
4. Tsis txhob muaj hluav taws kub: Cia kom deb ntawm cov nplaim taws thiab tsis txhob ua cua sov ntev hauv huab cua. Cov ntaub ntawv zoo li rwb thaiv tsev thiab khaub ncaws ntub nrog polyether polyols tuaj yeem ua rau kub hnyiab, yog li ceev faj.
5. Kev tua hluav taws: Thaum muaj hluav taws, siv ua npuas dej, hmoov, carbon dioxide, tshuaj tsuag dej, lossis dej ntau los tua nws.
Polyether polyols tsis yog tshuaj lom neeg. Lawv yog ib qho ntawm cov prepolymers rau polyurethane los yog unsaturated polyester thiab feem ntau muaj ib tug ntshiab, tsis muaj xim mus yellowish viscous organic hnyav nrog ib tug kub boiling point thiab flashpoint. Txawm li cas los xij, nws yog ib qho tseem ceeb uas yuav tsum tau ceev faj txog kev tiv thaiv hluav taws vim tias tseem muaj kev pheej hmoo ntawm hluav taws kub.