Txhawm rau txo cov nqi khoom thiab tau txais kev ua haujlwm ntxiv,polyurethane thermoplasticelastomers tuaj yeem siv tau raws li kev siv cov tshuaj toughening rau toughen ntau yam thermoplastic thiab hloov cov ntaub ntawv roj hmab.
Vimpolyurethaneyog ib qho polar polymer uas muaj zog heev, nws tuaj yeem sib xyaw nrog cov polar resins lossis roj hmab, xws li thaum siv nrog chlorinated polyethylene (CPE) los tsim cov khoom kho mob;Kev sib xyaw nrog ABS tuaj yeem hloov pauv kev siv engineering thermoplastic yas;Thaum siv ua ke nrog polycarbonate (PC), nws muaj cov khoom xws li roj tsis kam, roj tsis kam, thiab kev cuam tshuam, thiab tuaj yeem siv los ua lub cev tsheb;Kev sib xyaw nrog polyester tuaj yeem txhim kho nws qhov kev ua tau zoo;Tsis tas li ntawd, nws tuaj yeem ua tau zoo nrog polyvinyl chloride, polyoxymethylene (POM), lossis polyvinylidene chloride;Polyester polyurethane tuaj yeem ua tau zoo nrog 15% nitrile roj hmab lossis 40% nitrile roj hmab / polyvinyl chloride muab roj hmab;Polyether polyurethane kuj tuaj yeem ua tau zoo nrog 40% nitrile roj hmab / polyvinyl chloride blend nplaum;Nws tuaj yeem ua tau zoo nrog acrylonitrile styrene (SAN) copolymers;Nws tuaj yeem tsim cov qauv sib txuas sib txuas (IPN) nrog cov tshuaj tiv thaiv polysiloxanes.Feem ntau ntawm cov saum toj no-hais blended adhesives twb tau officially tsim.
Nyob rau hauv xyoo tas los no, muaj ntau qhov kev tshawb fawb txog kev toughening ntawm POM los ntawmTPUhauv Suav teb.Kev sib xyaw ntawm TPU thiab POM tsis yog tsuas yog txhim kho qhov kub thiab txias thiab cov khoom siv kho tshuab ntawm TPU, tab sis kuj tseem ua rau POM zoo heev.Qee cov kws tshawb fawb tau pom tias hauv kev ntsuam xyuas tensile pob txha, piv rau POM matrix, POM alloys nrog TPU ntxiv tau hloov pauv los ntawm cov pob txha tawg mus rau cov pob txha tawg.Qhov sib ntxiv ntawm TPU kuj tso cai rau POM nrog cov duab nco ua haujlwm.Lub crystalline cheeb tsam ntawm POM ua hauj lwm raws li lub taag theem ntawm cov duab nco alloy, thaum lub amorphous cheeb tsam ntawm amorphous TPU thiab POM ua hauj lwm raws li lub reversible theem.Thaum cov lus teb rov qab yog 165 ℃ thiab lub sijhawm rov qab yog 120 s, tus nqi rov qab ntawm cov hlau mus txog 95%, thiab cov nyhuv rov qab yog qhov zoo tshaj plaws.
TPU tsis yooj yim rau kev sib xyaw nrog cov khoom siv tsis yog-polar polymer xws li polyethylene, polypropylene, ethylene propylene roj hmab, roj hmab butadiene, isoprene roj hmab, lossis cov hmoov roj hmab khib nyiab, thiab tsis tuaj yeem tsim cov khoom sib xyaw nrog kev ua haujlwm zoo.Yog li ntawd, txoj kev kho saum npoo av xws li ntshav plasma, corona tawm, ntub chemistry, primer, nplaim taws, lossis cov pa roj reactive feem ntau yog siv rau tom kawg.Piv txwv li, Asmeskas cov khoom siv huab cua thiab cov tuam txhab tshuaj lom neeg tuaj yeem txhim kho qhov khoov modulus, lub zog tensile, thiab hnav tsis kam ntawm ultra-siab molecular hnyav polyethylene nplua hmoov nrog ib qho hnyav molecular ntawm 3-5 lab tom qab F2 / O2 active gas nto kho, thiab Ntxiv rau polyurethane elastomers hauv 10% piv.Ntxiv mus, F2 / O2 active gas nto kho yuav siv tau rau cov oriented elongated luv fibers nrog ib tug ntev ntawm 6-35mm hais los saum toj no, uas yuav txhim khu lub nruj thiab tsim kua muag toughness ntawm cov khoom sib xyaw.
Post lub sij hawm: Jan-19-2024