Polyether-based TPU

Polyether-based TPUimhando yeThermoplastic polyurethane elastomer. Nhanganyaya yayo yeChirungu ndeiyi inotevera:

### Kuumbwa uye Synthesis Polyether-based TPU inonyanya kugadzirwa kubva ku4,4′-diphenylmethane diisocyanate (MDI), polytetrahydrofuran (PTMEG), uye 1,4-butanediol (BDO). Pakati pavo, MDI inopa chimiro chakaomarara, PTMEG inoumba chikamu chakapfava chekupa izvo zvinhu nekushanduka, uye BDO inoita sengetani yekuwedzera kuwedzera mamorekuru cheni. Iyo synthesis process ndeyekuti MDI nePTMEG zvinotanga kuita kuti igadzire prepolymer, uye ipapo iyo prepolymer inopinda ketani yekuwedzera maitiro neBDO, uye pakupedzisira, polyether-based TPU inoumbwa pasi pechiito checatalyst.

### Structural Characteristics The molecular chain of TPU ine (AB)n-type block linear structure, apo A iri high-molecular-weight polyether soft segment ine molecular huremu hwe1000-6000, B inowanzoita butanediol, uye chimiro chemakemikari pakati peAB cheni i diisocyanate.

### Performance Advantages -

**Yakanaka Hydrolysis Resistance**: Iyo polyether bond (-O-) ine yakanyanya kugadzikana kemikari kupfuura iyo polyester bond (-COO-), uye haisi nyore kuputsika nekudzikisira mumvura kana inopisa uye ine mwando. Semuenzaniso, mukuedzwa kwenguva refu pa80 ° C uye 95% humidity yakaenzana, simba rekuchengetedza simba rekuchengetedza simba, polyether-based TPU, inopfuura 85%, uye hapana kuderera kuri pachena muhuwandu hwekupora elastic. - ** Yakanaka Yakaderera-Temperature Elasticity **: Iyo tembiricha yegirazi (Tg) yechikamu chepolyether yakadzikira (kazhinji pazasi -50 ° C), zvinoreva kutipolyether-based TPUinogona kuramba ichichengetedza elasticity yakanaka uye kuchinjika munzvimbo yakaderera-tembiricha. Mune -40 ° C yakaderera-tembiricha yekukanganisa bvunzo, hapana brittle fracture phenomenon, uye mutsauko mukukotama kuita kubva kune yakajairika tembiricha mamiriro ari pasi pe10%. - **Yakanaka Chemical Corrosion Resistance uye Microbial Resistance **:Polyether-based TPUine kushivirira kwakanaka kune yakawanda polar solvents (yakadai sedoro, ethylene glycol, weak acid uye alkali solutions), uye haizozvimba kana kunyungudika. Mukuwedzera, chikamu chepolyether hachigadziriswe nyore nyore nehutachiona (zvakadai se mold uye mabhakitiriya), saka inogona kudzivisa kukanganisa kwekushanda kunokonzerwa nekuputika kwehutachiona kana kushandiswa muvhu rakanyorova kana mvura. - ** Yakaenzana Mechanical Properties **: Tichitora semuenzaniso, kuoma kwayo kweShore ndeye 85A, inova yechikamu chepakati-yakakwirira kuomarara elastomers. Iyo haingochengete chete yakajairwa yakakwira elasticity uye kuchinjika kweTPU, asi zvakare ine yakakwana simba rechimiro, uye inogona kuwana chiyero pakati pe "elastic kupora" uye "kugadzikana kwechimiro". Kusimba kwayo kunogona kusvika 28MPa, kureba panguva yekuzorora kunodarika 500%, uye simba rekubvarura i60kN/m.

### Application Fields Polyether-based TPU inoshandiswa zvakanyanya muminda senge kurapwa, mota, uye kunze. Munzvimbo yezvokurapa, inogona kushandiswa kugadzira catheter yekurapa nekuda kweiyo yakanaka biocompatibility, hydrolysis kuramba uye microbial kuramba. Mundima yemotokari, inogona kushandiswa kune injini yekamuri hoses, zvisimbiso zvegonhi, nezvimwewo nekuda kwekukwanisa kwayo kutsungirira kupisa kwakanyanya uye kunyorova kwemamiriro ezvinhu, kuderera kwekushisa uye kupikisa ozone. Mumunda wekunze, wakakodzera kugadzira kunze kwemvura membranes, munzvimbo dzakaderera-tembiricha, nezvimwe.