Cov ntawv thov tseem ceeb ntawm THF
01.PTMEG yog siv los tsim spandex elastic fabrics, uas sawv cev rau daim ntawv thov loj tshaj plaws ntawm THF.
Tetrahydrofuran (THF) tau dhau cationic nplhaib-opening polymerization los tsim polytetramethylene ether glycol, hu ua PTMEG. Raws li ib qho tseem ceeb ntawm cov khoom siv raw khoom, PTMEG yog ntxiv polymerized los ua polyurethane, uas yog ces spun rau hauv spandex fiber. Ua tsaug rau nws cov cuab yeej zoo rov qab zoo, spandex tau dav siv rau hauv cov ntaub rau cov ris tsho hauv qab thiab cov khaub ncaws ua kis las, ua rau cov ntaub ntawv zoo nrog kev ncab thiab rov ua haujlwm zoo.
02.Dissolution-bonding Principple of THF rau PVC Adhesive
Tetrahydrofuran (THF) muaj peev xwm ua kom muaj zog heev rau PVC cob. Nws tuaj yeem swell sai thiab yaj PVC resin thiab siv dav hauv kev lag luam ua cov kuab tshuaj tseem ceeb rau PVC-bonding adhesives. Hauv PVC-adhesive system, THF dissolves PVC resin los ua kua nplaum los ntawm nws cov kuab tshuaj muaj zog. Tom qab cov kua nplaum siv rau kev sib koom ua ke ntawm cov kav dej PVC thiab fittings, cov kuab tshuaj volatilizes sai. Lub yaj PVC resin re-solidifies thiab fuses qhov chaw ntawm ob PVC substrates ua ke, ua kom tiav kev ruaj ntseg ntawm cov kav dej thiab fittings.
03.THF-raws li PTMEG rau Synthesis ntawm TPU: Khau Khoom, Pneumatic Hoses,Cable Sheaths
PTMEG polymerized los ntawm THF yog cov khoom muag muag tseem ceeb rau kev tsim TPU thermoplastic polyurethane. Ua tsaug rau cov elasticity zoo heev, tsis kub-kub tsis kam thiab abrasion tsis kam muab los ntawm PTMEG, cov ntaub ntawv TPU tiav tuaj yeem ua tiav rau hauv ntau yam khoom kawg, dav siv rau khau-qhov chaw, muaj pneumatic hoses thiab cable sheaths. Rau cov ntaub ntawv khau, siab resilience muab xis ko taw; pneumatic hoses tau txais txiaj ntsig zoo los ntawm kev ua haujlwm zoo thiab tsim kua muag; cable sheaths coj kom zoo dua ntawm TPU qhov kev puas tsuaj thiab cov khoom tiv thaiv kev laus los tiv thaiv cov hlua sab hauv.
