Chii chakasiyanaTPUuye PU?
TPU (polyurethane elastomer)
TPU (Thermoplastic Polyurethane Elastomer)iri kubuda epurasitiki siyana.Nekuda kwekuita kwayo kwakanaka, kuramba kwemamiriro ekunze, uye hushamwari kwezvakatipoteredza, TPU inoshandiswa zvakanyanya mumaindasitiri ane hukama akadai semidziyo yeshangu, pombi, mafirimu, rollers, tambo, uye waya.
Polyurethane thermoplastic elastomer, inozivikanwawo se thermoplastic polyurethane rubber, yakapfupikiswa seTPU, imhando ye(AB) n-block linear polymer.A ihuremu hwemamorekuru hwepamusoro (1000-6000) polyester kana polyether, uye B idhiori rine 2-12 yakatwasuka ketani kabhoni maatomu.Chimiro chemakemikari pakati pezvikamu zveAB diisocyanate, inowanzobatanidzwa neMDI.
Thermoplastic polyurethane rubber inotsamira pane intermolecular hydrogen bonding kana mild cross-linking pakati pemacromolecular cheni, uye aya maviri macross-linking zvimiro anodzoreka nekuwedzera kana kudzikira tembiricha.Munzvimbo yakanyungudutswa kana yekugadziriswa, masimba e-intermolecular anopera simba, uye mushure mekutonhora kana kunyunguduka kwemhepo, masimba akasimba e-intermolecular anobatana pamwe chete, kudzoreredza zvimiro zveyakasimba yekutanga.
Polyurethane thermoplastic elastomersinogona kuiswa mumhando mbiri: polyester uye polyether, ine white irregular spherical kana columnar particles uye hukama hwehukama hwe 1.10-1.25.Iyo polyether mhando ine yakaderera hama density pane polyester mhando.Iyo tembiricha yegirazi yekuchinja yemhando yepolyether ndeye 100.6-106.1 ℃, uye iyo yerudzi rwepolyester i108.9-122.8 ℃.The brittleness tembiricha yemhando yepolyester uye polyester mhando yakadzikira pane -62 ℃, nepo yakaderera tembiricha yemhando yakaoma ether iri nani pane yerudzi rwepolyester.
Hunhu hwakatanhamara hwepolyurethane thermoplastic elastomers hwakanyanya kupfeka kuramba, kwakanakisa ozone kuramba, kuomarara kwepamusoro, kusimba kwepamusoro, kunaka kwakanaka, kushomeka kwekushisa, kuramba kwakanaka kwemafuta, kuramba kwemakemikari, uye kuramba kwezvakatipoteredza.Munzvimbo dzine hunyoro, iyo hydrolysis kugadzikana kwepolyether esters inodarika iyo yemhando dzepolyester.
Polyurethane thermoplastic elastomers haina chepfu uye haina kunhuwa, inonyungudika muzvinonyungudutsa zvakaita semethyl ether, cyclohexanone, tetrahydrofuran, dioxane, uye dimethylformamide, pamwe nemusanganiswa wekunyungudutsa unoumbwa ne toluene, ethyl acetate, butanone, uye acetone muzvikamu zvakakodzera.Vanoratidza chimiro chisina ruvara uye chakajeka uye vane yakanaka kuchengetedza kugadzikana.
Nguva yekutumira: Kubvumbi-22-2024