TPU dabere na polyether

TPU dabere na polyetherbụ ụdị nkeihe elastomer nke polyurethane thermoplasticOkwu mmeghe ya n'asụsụ Bekee bụ nke a:

### Nhazi na Nchikota A na-emepụta TPU dabere na Polyether site na 4,4′-diphenylmethane diisocyanate (MDI), polytetrahydrofuran (PTMEG), na 1,4-butanediol (BDO). N'ime ha, MDI na-enye nhazi siri ike, PTMEG bụ akụkụ dị nro iji nye ihe ahụ mgbanwe, BDO na-arụkwa ọrụ dị ka onye na-agbatị yinye iji mee ka ogologo yinye molekul dịkwuo elu. Usoro nhazi ahụ bụ na MDI na PTMEG na-ebu ụzọ meghachi omume iji mepụta prepolymer, wee prepolymer na-enweta mmeghachi omume ndọtị yinye na BDO, na n'ikpeazụ, a na-emepụta TPU dabere na polyether n'okpuru ọrụ nke ihe na-akpali akpali.

### Àgwà Nhazi Usoro nhazi nke TPU nwere nhazi linear nke blọk (AB)n, ebe A bụ akụkụ dị nro nke polyether dị elu nke nwere ibu molekul nke 1000-6000, B na-abụkarị butanediol, nhazi kemịkalụ dị n'etiti agbụ AB bụ diisocyanate.

Uru Arụmọrụ ### -

**Nguzogide Mmiri Dị Mma**: Njikọ polyether (-O-) nwere nkwụsi ike kemịkalụ dị elu karịa njikọ polyester (-COO-), ọ dịghịkwa mfe ịgbaji ma mebie na mmiri ma ọ bụ gburugburu ebe ọkụ na iru mmiri. Dịka ọmụmaatụ, n'ule ogologo oge na 80°C na iru mmiri dị 95%, ọnụego njide ike nrụgide, TPU nke dabeere na polyether, gafere 85%, ọ dịghịkwa mbelata doro anya na ọnụego mgbake elastic. – **Ezigbo Ngbanwe Okpomọkụ Dị Ala**: Okpomọkụ mgbanwe iko (Tg) nke akụkụ polyether dị ala (na-adịkarị n'okpuru -50°C), nke pụtara naTPU dabere na polyetherka nwere ike ịnọgide na-enwe ezigbo ike ịgbanwe agbanwe na mgbanwe n'ebe okpomọkụ dị ala. N'ule mmetụta okpomọkụ dị ala -40°C, enweghị ihe mgbawa gbawara agbawa, ọdịiche dị na arụmọrụ gbawara agbawa site na ọnọdụ okpomọkụ nkịtị erughị 10%. – **Ezigbo Nguzogide Njehie Kemịkalụ na Nguzogide Microbial**:TPU dabere na polyethernwere ezigbo ndidi nye ọtụtụ ihe mgbaze polar (dịka mmanya, ethylene glycol, acid na-adịghị ike na alkali solutions), ọ gaghịkwa agbaze ma ọ bụ gbazee. Na mgbakwunye, akụkụ polyether anaghị agbaze ngwa ngwa site na nje bacteria (dị ka ebu na nje bacteria), yabụ ọ nwere ike izere ọdịda arụmọrụ nke mbuze nje bacteria kpatara mgbe ejiri ya na ala mmiri ma ọ bụ gburugburu mmiri. – **Njirimara Mechanical Conformity**: Dịka ọmụmaatụ, ike Shore ya bụ 85A, nke so na ụdị nke elastomers siri ike dị elu. Ọ bụghị naanị na ọ na-ejigide ike na mgbanwe dị elu nke TPU, kamakwa o nwere ike nhazi zuru oke, ma nwee ike nweta nguzozi n'etiti "nkwụghachi azụ na-agbanwe agbanwe" na "nkwụsi ike ọdịdị". Ike nrụgide ya nwere ike iru 28MPa, ogologo oge mgbe ọ gbawara gafere 500%, ike ndọda bụkwa 60kN/m.

### Ubi Ngwa A na-ejikarị TPU nke dabere na Polyether eme ihe n'ọhịa dịka ọgwụgwọ ahụike, ụgbọala, na n'èzí. N'ọhịa ahụike, enwere ike iji ya mee kateeti ahụike n'ihi ezigbo ndakọrịta ya na bio, iguzogide hydrolysis na iguzogide nje bacteria. N'ọhịa ụgbọala, enwere ike iji ya mee paịpụ nke ngalaba injin, akara ọnụ ụzọ, wdg. n'ihi ikike ya iguzogide gburugburu okpomọkụ na iru mmiri dị elu, obere mgbanwe okpomọkụ na iguzogide ozone. N'ọhịa dị n'èzí, ọ dabara adaba maka ime akpụkpọ ahụ mmiri na-adịghị na mpụga, na gburugburu ebe okpomọkụ dị ala, wdg.