PCDLNws sawv cev rau polycaprolactone diol. Nws yog ib hom polyester polyol siv nyob rau hauv polyurethane chemistry raws li ib tug mos ntu raw khoom. Nws yog tsim los ntawm lub nplhaib qhib polymerization ntawm epsilon caprolactone siv lub diol pib. Cov qauv molecular muaj rov ua dua caprolactone units nrog hydroxyl pawg ntawm ob qho kawg, uas tso cai rau nws ua rau cov tshuaj isocyanates los tsim cov ntaub ntawv polyurethane.
Hauv kev tsim cov polyurethane, PCDL ua lub luag haujlwm tseem ceeb hauv kev txiav txim siab qhov yooj yim, lub zog, thiab ua haujlwm ntev ntawm cov khoom kawg. Nws yog feem ntau siv hauv cam khwb cia polyurethane elastomers, thermoplastic polyurethane, coatings, adhesives, thiab sealants. Nws yog tshwj xeeb tshaj yog muaj nuj nqis nyob rau hauv daim ntawv thov uas yuav tsum muaj qhov sib npaug ntawm cov neeg kho tshuab lub zog thiab hloov tau yooj yim.
Ib qho ntawm cov yam ntxwv tseem ceeb ntawm PCDL yog nws txoj kev tiv thaiv zoo heev rau hydrolysis. Piv nrog cov pa polyester polyols, PCDL raws li polyurethane tshuab qhia tau zoo dua ruaj khov thaum raug dej thiab dej hauv lub sijhawm ntev. Qhov no ua rau nws tsim nyog rau ib puag ncig uas cov av noo lossis dej sib cuag tsis tuaj yeem zam, xws li cov khoom siv hauv hiav txwv, cov khoom siv sab nraum zoov, thiab qee yam khoom siv tshuaj.
Lwm cov cuab yeej tseem ceeb yog nws qhov zoo ntawm qhov kub thiab txias hloov tau yooj yim. Polyurethanes ua nrog PCDL tuaj yeem tswj qhov elasticity ntawm qhov kub thiab txias yam tsis muaj nkig. Qhov no muaj txiaj ntsig zoo hauv cov ntawv thov xws li cov menyuam, lub log, cov ntsaws ruaj ruaj, thiab cov khoom siv vibration damping uas ua haujlwm hauv kev hloov huab cua lossis qhov chaw txias.
PCDL kuj tseem txhawb nqa lub zog zoo txhua yam thaum muab tso rau hauv polyurethane formulations. Nws muab qhov sib npaug ntawm hardness thiab elasticity, tso cai rau cov tuam txhab tsim cov khoom siv uas muaj zog thiab hloov tau. Qhov kev sib xyaw ua ke no yog qhov tseem ceeb hauv kev siv engineering uas rov muaj kev ntxhov siab, cuam tshuam, lossis deformation tshwm sim.
Ntxiv nrog rau nws cov khoom siv zoo, PCDL muaj cov tshuaj lom neeg ruaj khov zoo piv nrog ntau tus qauv polyester polyols. Nws ua tau zoo dua hauv kev tiv thaiv dej, dilute acids, thiab kev laus ib puag ncig. Txawm li cas los xij, nws tseem yog cov tshuaj tsw qab lossis aliphatic polyurethane tivthaiv nyob ntawm kev tsim, yog li nws cov tshuaj tiv thaiv nyob ntawm tag nrho cov qauv tsim.
PCDL muaj nyob rau hauv qhov sib txawv molecular hnyav xws li 1000, 2000, thiab 3000. Qhov hnyav molecular cuam tshuam cov khoom kawg ntawm polyurethane. Qhov qis dua molecular PCDL feem ntau ua rau cov ntaub ntawv nyuaj thiab muaj zog dua, thaum cov qib molecular hnyav dua ua softer thiab hloov tau ntau dua elastomers. Qhov no tso cai rau cov neeg tsim qauv los kho qhov ua tau zoo los ntawm kev xaiv cov qib uas tsim nyog.
Txawm hais tias nws qhov zoo, PCDL yog kim dua li cov polyether polyols xws li PTMEG lossis polypropylene glycol. Vim li no, nws feem ntau yog siv rau hauv cov ntawv thov kev ua haujlwm siab dua li cov khoom lag luam uas tsis tshua muaj nqi. Kev lag luam uas xav tau kev pab lub neej ntev, hnav tsis kam, thiab kev ua haujlwm ruaj khov nyob rau hauv qhov hnyav yog cov neeg siv tseem ceeb ntawm PCDL raws li polyurethane systems.
Cov ntawv thov muaj xws li kev lag luam rollers, conveyor log, cov khoom siv mining, kev ua haujlwm siab, cov khoom siv tsheb, thiab cov txheej txheem tshwj xeeb. Nws kuj tseem siv rau hauv thermoplastic polyurethane qhov twg yuav tsum tau ua kom zoo dua hydrolysis thiab cov khoom siv kho tshuab.