I-TPU esekelwe kwi-polyether

I-TPU esekelwe kwi-polyetherwuhlobo lwei-thermoplastic polyurethane elastomer. Isingeniso sayo sesiNgisi simi kanje:

### I-Composition and Synthesis Polyether-based TPU ihlanganiswa kakhulu kusukela ku-4,4′-diphenylmethane diisocyanate (MDI), polytetrahydrofuran (PTMEG), kanye ne-1,4-butanediol (BDO). Phakathi kwazo, i-MDI ihlinzeka ngesakhiwo esiqinile, i-PTMEG yakha ingxenye ethambile ukuze inikeze izinto eziguquguqukayo, futhi i-BDO isebenza njenge-chain extender ukwandisa ubude bochungechunge lwamangqamuzana. Inqubo yokuhlanganisa iwukuthi i-MDI ne-PTMEG kuqala isabela ukuze yenze i-prepolymer, bese i-prepolymer ithola ukusabela kwe-chain extension nge-BDO, futhi ekugcineni, i-TPU esekelwe ku-polyether iyakhiwa ngaphansi kwesenzo se-catalyst.

### Izimpawu Zesakhiwo Iketango lamangqamuzana e-TPU linokwakheka komugqa webhulokhi yohlobo (AB)n, lapho u-A eyingxenye ethambile ye-polyether enesisindo se-molecular enesisindo se-molecular engu-1000-6000, B ngokuvamile iyi-butanediol, futhi ukwakheka kwamakhemikhali phakathi kwamaketanga e-AB kuyi-disocyanate.

### Izinzuzo zokusebenza -

**I-Hydrolysis Resistance Enhle Kakhulu**: Ibhondi ye-polyether (-O-) inokusimama kwamakhemikhali okuphezulu kakhulu kunebhondi ye-polyester (-COO-), futhi akulula ukuphuka nokwehliswa emanzini noma endaweni eshisayo nenomswakamo. Isibonelo, ekuhlolweni kwesikhathi eside ku-80 ° C kanye no-95% womswakama ohlobene, izinga lokugcinwa kwamandla e-tensile, i-TPU esekelwe ku-polyether, idlula u-85%, futhi akukho ukwehla okusobala kwezinga lokutakula okunwebekayo. - **I-Good Low-Temperature Elasticity**: Izinga lokushisa lengilazi lokushintsha (Tg) lengxenye ye-polyether liphansi (imvamisa lingaphansi -50°C), okusho ukuthiI-TPU eyenziwe nge-polyetherisengakwazi ukugcina ukunwebeka okuhle nokuvumelana nezimo endaweni enezinga lokushisa eliphansi. Esivivinyweni somthelela wezinga lokushisa eliphansi -40°C, asikho isenzakalo sokuphuka kwe-brittle, futhi umehluko ekusebenzeni kokugoba kusukela kusimo sezulu esivamile ungaphansi kuka-10%. - **I-Chemical Corrosion Resistance enhle kanye nokumelana ne-Microbial**:I-TPU esekelwe kwi-polyetherinokubekezelela okuhle kumakhemikhali amaningi e-polar (njengotshwala, i-ethylene glycol, i-asidi ebuthakathaka kanye nezixazululo ze-alkali), futhi ngeke zivuvuke noma zincibilike. Ngaphezu kwalokho, ingxenye ye-polyether ayiboli kalula ama-microorganisms (njengesikhunta namagciwane), ngakho-ke ingagwema ukwehluleka kokusebenza okubangelwa ukuguguleka kwe-microbial uma isetshenziswa enhlabathini enomswakama noma indawo yamanzi. – **Izakhiwo Zemishini Ezilinganisiwe**: Uma sithatha njengesibonelo, ukuqina kwayo ogwini kungu-85A, okuyingxenye yesigaba sama-elastomers aqinile aphakathi nendawo. Ayigcini nje ngokugcina ukunwebeka okuphezulu okujwayelekile kanye nokuguquguquka kwe-TPU, kodwa futhi inamandla anele esakhiwo, futhi ingafinyelela ibhalansi phakathi "kwe-elastic recovery" kanye "nokuqina komumo". Amandla ayo aqinile angafinyelela ku-28MPa, ubude ngesikhathi sekhefu budlula u-500%, futhi amandla okudabula ngu-60kN/m.

### Application Fields Polyether-based TPU isetshenziswa kakhulu emikhakheni efana nokwelashwa, izimoto, nangaphandle. Emkhakheni wezokwelapha, ingasetshenziswa ukwenza ama-catheter ezokwelapha ngenxa ye-biocompatibility yayo enhle, ukumelana ne-hydrolysis kanye nokumelana ne-microbial. Emkhakheni wezimoto, ingasetshenziselwa amapayipi e-compartment enjini, izigxivizo zeminyango, njll. ngenxa yekhono layo lokumelana nezimo zokushisa eziphezulu kanye nomswakama, ukunwebeka okuphansi kwezinga lokushisa kanye nokumelana ne-ozone. Emkhakheni ongaphandle, ifaneleka ukwenza ama-membrane angaphandle angangeni manzi, ezindaweni ezisezingeni eliphansi lokushisa, njll.