Polycaprolactone polyols yog ib chav kawm tshwj xeeb ntawm polyester polyols nyiam nyob rau hauv polyurethane elastomer daim ntaub ntawv uas siab dynamic durability, dav kub profiles, zoo heev hydrolysis tsis kam, thiab tshwj xeeb elastomeric zog yuav tsum tau. Polyester polyols, raws li cov chav kawm, feem ntau xaiv rau urethane daim ntaub ntawv qhov twg siab tensile zog thiab tsim kua muag kuj, zawv zawg abrasion tsis kam, flex fatigue tsis kam, roj, roj thiab hnyav kuj, thiab kub thiab oxidative stability yog xav tau.
Thaum muab piv nrog adipate-based polyester polyols hauv polyurethane elastomers, caprolactone polyols qhia txog qhov ua tau zoo hauv qab no:
Superior tsis kam rau hydrolysis
Zoo dua weatherability thiab UV stability
Zoo dua qhov kub thiab txias (tsawg Tg) thiab kev ua haujlwm kub
Enhanced abrasion tsis kam
Cov tshuaj tiv thaiv siab dua rau cov roj, roj, & cov kuab tshuaj
Txiav, nti, thiab rhuav lub zog
Kev ua tau zoo vim lawv cov viscosities tsawg thiab tsawg polydispersity
Tsis muaj prepolymer viscosity creep rau ntawm cia
Formulators tuaj yeem txhim kho cov cuab yeej dav dav no los ntawm kev xaiv kom zoo ntawm "initiator" diol (saib hauv qab) siv los tsim ntau qib ntawm polycaprolactone polyols. Yog li ntawd, cov polycaprolactone polyols muaj ntau yam zoo nyob rau hauv lub hom phiaj tsim ntawm polyurethanes xav tau kev ua tau zoo cwj pwm thiab kev pab lub neej. Ntxiv rau qhov "initiator" hom siv, polycaprolactone polyols muaj nyob rau hauv ntau yam ntawm molecular hnyav (300-4000), functionalities (diols, triols thiab tetraols), uas tsis muaj acidity qhov tseem ceeb thiab polydispersity's (Molecular Weight Distribution).