Polyester-Based Thermoplastic Polyurethane (Polyester TPU)

# ## 1. Cov Lus Txhais Tseem CeebTPU raws li Polyester(Polyester TPU) yog ib homthermoplastic polyurethane elastomer, ib qho linear segmented block copolymer. Nws cov mos mos feem ntau yog los ntawm **polyester polyols** (piv txwv li, polyadipate glycol, PAG), tsim los ntawm polycondensation ntawm adipic acid (AA) thiab diols (piv txwv li, 1,4-butanediol, BDO). Nws yog ib qho ntawm ob pawg tseem ceeb ntawmTPU, ua ke nrog polyether-based TPU.

## 2. Cov Qauv Tshuaj & Kev Sib Xyaws ### Cov Khoom Siv Raw Tseem Ceeb - **Diisocyanate**: Feem ntau **4,4′-diphenylmethane diisocyanate (MDI)** (≈40% ntawm cov qauv). – **Polyester Polyol (Seem Mos)**: Sib Xyaws los ntawm **adipic acid (AA)** (≈35%) thiab **1,4-butanediol (BDO)**. – **Chain Extender (Seem Nyuaj)**: Diol luv-saw, feem ntau **1,4-butanediol (BDO)** (≈25%). ### Lub Tshuab Polymerization Polyester TPU yog synthesized los ntawm **kauj ruam-loj hlob polymerization** tshuaj tiv thaiv: 1. Lub polyester polyol (seem mos) reacts nrog MDI los tsim ib tug prepolymer nrog isocyanate kawg pawg. 2. Lub prepolymer ces yog saw-extended nrog BDO, tsim alternating **seem tawv** (MDI-BDO) thiab **seem mos** (polyester polyol). 3. Muaj kev sib txuas hydrogen sib txuas ntawm cov molecule (-COO-) thiab cov urethane (-NHCOO-) hauv cov khoom tawv, ua rau muaj kev sib txuas ntawm lub cev.

## 3. Cov Khoom Tseem Ceeb ### Cov Khoom Siv Kho Tshuab - **Lub Zog Tensile & Ruaj Khoov Siab**: Zoo dua li polyetherTPU, vim muaj kev sib cuam tshuam polar muaj zog thiab hydrogen bonding. – **Kev Tiv Thaiv Kev Sib Txhuam Zoo Kawg Nkaus**: Ib qho ntawm nws cov yam ntxwv zoo tshaj plaws, zoo tagnrho rau kev siv hnav siab. – **Cov Khoom Zoo Flexural & Compressive**: Kev ruaj khov thiab muaj peev xwm thauj khoom. – **Ntau Yam Hardness Dav**: Tuaj yeem tsim los ntawm Shore A 60 mus rau Shore D 80, sib npaug elasticity thiab rigidity. ### Kev Tiv Thaiv Tshuaj & Ib puag ncig – **Kev Tiv Thaiv Roj & Roj Zoo Kawg Nkaus**: Tiv taus cov kuab tshuaj uas tsis yog polar, roj, thiab cov roj lubricating. – **Kev Tiv Thaiv Cov kuab tshuaj zoo**: Tiv taus ntau cov kuab tshuaj organic (piv txwv li, cawv, esters). – **Kev Tiv Thaiv Kub Nruab Nrab**: Kev ruaj khov thermal zoo, tsim nyog rau kev siv tas mus li ntawm qhov kub txog li 80–100 ° C. – **Kev Tiv Thaiv Hydrolysis Tsis Zoo**: Cov ester bonds raug dej txiav, tshwj xeeb tshaj yog nyob rau hauv qhov chaw kub, noo noo, ua rau cov khoom puas tsuaj. – **Kev Hloov Kho Kub Qis Tsis Zoo**: Ua kom tawv thiab tawg ntawm qhov kub qis dua -20 ° C. ### Lwm Yam Khoom - **Pob tshab zoo**: Muaj cov qib pob tshab lossis pob tshab. - **Sib xws zoo**: Sib xws nrog cov polymers polar xws li PVC, ua rau yooj yim sib xyaw thiab hloov kho.

## 4. Cov Ntawv Thov Ib Txwm Siv Polyester TPU yog siv dav hauv cov teb uas xav tau lub zog siab, tiv taus kev sib txhuam, thiab tiv taus roj: – **Kev Lag Luam & Kev Tsim Kho**: Siv txoj siv conveyor, hydraulic hoses, seals, gaskets, rollers, thiab cov khoom siv tiv taus kev hnav. – **Khau**: Cov khau sab nraud, cov khau nruab nrab, thiab cov khoom siv khau rau kev ruaj khov thiab tiv taus roj. – **Tsheb**: Sab hauv trim, cable jacketing, airbag npog, thiab cov khoom siv roj. – **Coatings & Adhesives**: Cov txheej txheem ua haujlwm siab rau cov ntaub, hlau, thiab yas; cov nplaum tsim. – **Hlau & Cable**: Jacketing rau cov cables kev lag luam uas xav tau roj thiab tiv taus kev sib txhuam. – **Kev Ua Si & Kev Lom Zem**: Khau looj caij ski, log inline skate, thiab cov khoom siv kis las.

## 5. Kev Sib Piv nrog Polyether TPU | Khoom | Polyester TPU | Polyether TPU | |:— |:— |:— | | **Seem Mos** | Polyester polyol (piv txwv li, PAG) | Polyether polyol (piv txwv li, PTMEG) | | **Lub Zog Tensile** | Siab | Nruab Nrab | | **Kev Tiv Thaiv Kev Sib Txhuam** | Zoo Kawg Nkaus | Zoo | | **Kev Tiv Thaiv Roj/Kua Tshuaj** | Zoo Kawg Nkaus | Nruab Nrab | | **Kev Tiv Thaiv Hydrolysis** | Tsis Zoo | Zoo Kawg Nkaus | | **Kev Yoog Tau Thaum Kub Qis** | Tsis Zoo | Zoo Kawg Nkaus | | **Tus Nqi** | Qis Dua | Siab Dua |

## 6. Kev Ua & Kev Tuav - **Txoj Kev Ua**: Siv tau cov txheej txheem thermoplastic txheem: kev txhaj tshuaj molding, extrusion, blow molding, thiab calendering. – **Qhov Yuav Tsum Tau Qhuav**: Yuav tsum tau qhuav kom huv si (80–100°C rau 2–4 teev) ua ntej ua kom tsis txhob hydrolysis thiab npuas. – **Qhov Kub Ntawm Kev Pwm**: Feem ntau 180–220°C, nyob ntawm qib thiab qhov nyuaj.

## 7. Cov Zoo thiab Cov Kev Txwv ### Cov Zoo - Lub zog zoo heev thiab tiv taus kev sib txhuam. - Ua haujlwm tau zoo heev rau roj thiab tshuaj lom neeg. - Sib xws zoo nrog cov ntaub ntawv polar. - Tus nqi qis dua piv rau polyether TPU.