Polycaprolactone diol feem ntau yog siv los ua ib qho muag muag- ntu raw khoom hauv kev npaj cov ntaub ntawv polyurethane; cov pab pawg hydroxyl ntawm nws cov saw hlau xaus nrog cov isocyanate pawg los tsim cov urethane linkages, yog li koom nrog hauv kev tsim kho ntawm polyurethane molecular saw. Vim nws qhov kev hloov pauv ntawm cov saw hlau molecular, nws muab qhov chaw rau segmental motion nyob rau hauv lub polymer, imparting zoo yooj thiab elasticity rau cov khoom. Yog li ntawd, cov khoom xws li hardness, elongation, thiab elasticity tuaj yeem kho los ntawm kev kho qhov hnyav molecular thiab kev sib koom ua ke ntawm polycaprolactone diol.
Tshaj li muab kev yooj yim, polycaprolactone diol txhim kho cov khoom siv ntawm cov khoom siv polyurethane. Cov ester pawg nyob rau hauv nws cov molecular chains muaj polarity, ua kom muaj zog intermolecular kev sib cuam tshuam nrog cov polyurethane nyuaj ntu thiab ua kom muaj kev sib raug zoo ntawm cov ntu mos thiab tawv. Nrog cov qauv tsim nyog, polyurethanes raws li polycaprolactone diol feem ntau pom muaj lub zog tensile zoo, ua tsis taus, thiab lub zog tsim kua muag. Yog li ntawd, lawv pom daim ntawv thov hauv cov ntaub ntawv xws li polyurethane elastomers, coatings, adhesives, thiab hluavtaws tawv.
Polycaprolactone diol kuj muaj qhov zoo qis - qhov kub thiab txias tsis kam thiab qaug zog, cov cwj pwm txuas rau qhov yooj yim ntawm nws cov saw hlau molecular thiab nws cov semi-crystalline xwm. Zoo -tsim polycaprolactone-raws li polyurethanes tuav zoo elasticity thiab seem stability nyob rau hauv tej yam kev mob ntawm kub hloov los yog rov qab txhua yam kev nyuaj siab. Yog li ntawd, polycaprolactone diol yog ib qho zoo heev soft- ntu xaiv rau kev txhim kho tag nrho cov kev ua tau zoo ntawm cov ntaub ntawv raug rau lub sij hawm khoov, ncab, los yog kev sib txhuam. Tsis tas li ntawd, nws qhov kev ua tau zoo sib npaug tuaj yeem ua tau zoo ntxiv -ntu los ntawm kev sib xyaw nrog lwm cov polyether lossis polyester polyols.
Lub luag haujlwm ntawm polycaprolactone diol tsis txwv rau kev txhim kho ib qho khoom ntiag tug; es, los ntawm kev koom tes hauv kev tsim cov qauv polyurethane molecular, nws ua rau muaj kev cuam tshuam zoo rau cov khoom siv yooj yim, lub zog, kev puas tsuaj, thiab kav ntev. Cov yam ntxwv xws li qhov hnyav molecular, tus nqi hydroxyl, acid tus nqi, thiab ntau npaum li cas cuam tshuam rau cov khoom siv kawg, yuav tsum tau ceev faj xaiv raws li daim ntawv thov tshwj xeeb thaum lub sij hawm tsim qauv. Rau cov khoom sib txawv polyurethane, cov khoom siv nrog cov yam ntxwv sib txawv tuaj yeem tau txais los ntawm kev kho qhov piv ntawm polycaprolactone diol rau isocyanate thiab lwm yam polyols.