Waa maxay faraqa u dhexeeya TPU iyo PU?

Waa maxay farqiga u dhexeeyaTPUiyo PU?

TPU (polyurethane elastomer)

TPU (Thermoplastic Polyurethane Elastomer)waa noocyo caag ah oo soo baxaya. Sababtoo ah hab-socodka wanaagsan, caabbinta cimilada, iyo saaxiibtinimo deegaanka, TPU waxaa si weyn loogu isticmaalaa warshadaha la xidhiidha sida alaabta kabaha, tuubooyinka, filimada, rollers, fiilooyinka, iyo fiilooyinka.

elastomer Polyurethane thermoplastic elastomer, sidoo kale loo yaqaan caag poliurethane thermoplastic, oo loo soo gaabiyo TPU, waa nooc ka mid ah (AB) n-block polymer linear. A waa miisaan sare (1000-6000) polyester ama polyeter, iyo B waa diol ka kooban 2-12 silsilad toosan atamka carbon. Qaab dhismeedka kiimikada ee u dhexeeya qaybaha AB waa diisocyanate, inta badan waxaa ku xiran MDI.

Dabaqa polyurethane heerkulku waxa uu ku tiirsan yahay isku xidhka hydrogen intermolecular ama isku xidhka khafiifka ah ee u dhexeeya silsiladaha makromolecular, labadan qaab-dhismeedka isku xidha ayaa dib loo rogaa iyada oo kor u kaca ama hoos u dhaca heerkulka. Xaaladda dhalaalaysa ama xalalka, xoogagga intermolecular way daciifaan, ka dib qaboojinta ama uumiga dareeraha, xoogagga xooggan ee intermolecular ayaa isku xira, soo celinta sifooyinka asalka adag.

Elastomers poliurethane thermoplasticWaxaa loo kala saari karaa laba nooc: polyester iyo polyeter, oo leh qaybo wareegsan oo aan caadi ahayn ama tiirar iyo cufnaan qaraabo ah 1.10-1.25. Nooca polyeter-ka ayaa leh cufnaanta qaraabada hoose marka loo eego nooca polyesterka. Heerkulka kala-guurka dhalada ee nooca polyeter-ka waa 100.6-106.1 ℃, iyo nooca polyester-ka waa 108.9-122.8 ℃. Heerkulka jajaban ee nooca polyeter-ka iyo nooca polyester-ka ayaa ka hooseeya -62 ℃, halka iska caabbinta heerkulka hooseeya ee nooca ether-ka adag uu ka fiican yahay nooca polyesterka.

Astaamaha aadka u wanaagsan ee elastomers-ka poliurethane waa iska caabin aad u fiican, iska caabin ozone heer sare ah, qallafsanaan sare, xoog sare, barti wanaagsan, iska caabin heerkul hoose, caabbinta saliid wanaagsan, caabbinta kiimikada, iyo iska caabinta deegaanka. Deegaannada qoyan, xasilloonida hydrolysis ee esters polyether-ka ayaa aad uga badan noocyada polyester-ka.

Elastomers Polyurethane thermoplastic waa kuwa aan sun ahayn oo aan ur lahayn, oo ku milma dareerayaasha sida methyl ether, cyclohexanone, tetrahydrofuran, dioxane, iyo dimethylformamide, iyo sidoo kale dareerayaasha isku dhafan ee ka kooban toluene, ethyl acetate, butanone, iyo acetone ee qiyaasta ku habboon. Waxay muujiyaan xaalad aan midab lahayn oo hufan waxayna leeyihiin xasillooni kaydinta wanaagsan.