yog dab tsiPTMEG?
CAS: 24979-97-3
Cov mis mos molecular: C4H8O
Molecular Luj: 72.1057
Cov yam ntxwv ntawm cov khoom:
PTMEG yog cov khoom siv dawb. Nws dhau los ua cov kua pob tshab thaum qhov kub thiab txias siab dua chav tsev. Nws yog soluble hauv cawv, esters, ketones, aromatic hydrocarbons, thiab chlorinated hydrocarbons. Txawm li cas los xij, nws yog insoluble hauv dej los yog aliphatic hydrocarbons. Raws li nws qhov hnyav molecular nce, nws solubility txo. Nyob rau hauv chav tsev kub, PTMEG muaj hygroscopicity zoo, nyob ntawm nws qhov hnyav molecular, nrog rau qhov siab tshaj plaws txog li 2%.
Cov khoom siv:
PTMEG yog ib qho tseem ceeb raw khoom rau zus tau tej cov polyurethane (xws li PU fibers, polyurethane elastomers, hluavtaws tawv, txheej additives, adhesives, sealants), polyesters, thiab polyamides.
Cia thiab thauj:
PTMEG yuav tsum tau muab khaws cia rau hauv lub thawv kaw tag nrog cov roj nitrogen qhuav. Lub thawv yuav tsum muaj cov khoom siv cua sov sab hauv thiab sab nraud kom tswj tau qhov kub thiab txias ntawm lub ntim ntawm ib ncig ntawm 50 degree. Frozen PTMEG tuaj yeem ua kom sov li ntawm 70 degree rau 24 teev kom yaj. PTMEG yuav tsum tsis txhob khaws cia rau lub sijhawm ntev ntawm 90 degree.
Tsis tas li ntawd, nws yuav tsum tau muab cia rau hauv qhov chaw txias, qhuav, zoo-ventilated, deb ntawm qhov chaw ntawm tshav kub, sparks, thiab qhib nplaim taws. Vim nws hygroscopic thiab oxidizable xwm,
PTMEG yuav tsum tsis txhob raug dej los yog huab cua. Txhawm rau kom tsis txhob muaj hluav taws xob zoo li qub, cov thawv ntim khoom yuav tsum tau ua los ntawm cov khoom siv hauv ntiaj teb thaum thauj.
PTMEG yog cov nplaim taws heev ntawm qhov kub thiab txias. Thaum muaj hluav taws kub, tshuaj tsuag dej, cawv ua npuas ncauj, tshuaj tua hluav taws qhuav, lossis carbon dioxide extinguisher tuaj yeem siv los tua hluav taws. Cov hnab looj tes thiab looj tsom iav yuav tsum hnav thaum thauj khoom thiab tshem tawm kom tiv thaiv qhov muag lossis tawv nqaij.
PTMG yog hygroscopic thiab degrades thaum raug oxygen lossis huab cua, yog li nws yuav tsum tau ntim nrog cov roj nitrogen qhuav. Poly (tetramethylene ether) glycol yog dawb thiab waxy nyob rau hauv chav tsev kub, tab sis dhau los ua pob tshab thiab tsis muaj xim kua thaum rhuab. Yog tias lub nruas tau ruaj khov, nws tuaj yeem khaws cia sov li ntawm 70 degree rau 24 teev kom yaj nws. Txawm li cas los xij, cov cua sov hauv zos yuav tsum zam. Thaum khaws cia rau hauv daim ntawv ua kua, nws raug nquahu kom khaws qhov kub hauv qab 50 degree.