Qhov sib txawv ntawmTPU Hom Polyetherthiabpolyester yam
TPU tuaj yeem faib ua ob hom: Polyet Hom thiab hom polyester. Raws li cov cai sib txawv ntawm cov ntawv thov cov khoom lag luam, ntau hom TPUS yuav tsum tau xaiv. Piv txwv li, yog tias cov kev xav tau rau kev ua haujlwm hydrolysis ua rau muaj kev kub ntxhov, Polyets hom TPU yog qhov ntau dua li Polyester Hom TPU.
Yog li hnub no, cia peb tham txog qhov sib txawv ntawmPolyether Hom TPUthiabPolyester Yam Tpu, thiab yuav ua li cas paub qhov txawv lawv? Cov hauv qab no yuav piav ntau ntxiv ntawm plaub yam: qhov sib txawv ntawm cov ntaub ntawv raw, cov qauv sib txawv, thiab cov qauv sib piv.
1, sib txawv hauv cov ntaub ntawv raw
Kuv ntseeg tias muaj ntau tus neeg paub txog lub tswv yim ntawm thermoplastic elastomers, uas muaj ib ntu thiab nyuaj ntu, kom coj yooj yim thiab sib zog rau cov khoom.
TPU kuj muaj ob qho tib si muag muag thiab nyuaj ntu, thiab qhov sib txawv ntawm polyeting hom lus dag nyob rau hauv qhov txawv ntawm cov saw mos sirg. Peb tuaj yeem pom qhov sib txawv los ntawm cov khoom siv raw.
Polyether Hom TPU: 4-4 '- diphenylmethane diisocyanate (ptmeg), 1,4-butanediol (40% rau ptmeg, thiab 20% rau bdo.
Polyester Hom TPU: 4-4 '- Diphenylmethane Diisocyanate (MDI-Butanediol (AA suav nyiaj txog 35%, thiab BDO as-account txog li 25%.
Peb tuaj yeem pom tias cov khoom siv raw rau kev polyeting hom tpu cov saw mos mos yog polytetrahydrofuran (ptmeg); Cov khoom siv raw rau polyester hom tpu mos mos segments yog adipic acid reacment.
2, qauv sib txawv
Cov molecular chart ntawm TPU muaj ib qho (AB) N-hom block tus qauv, qhov twg yog cov qauv tshuaj sib cais (1000
Raws li cov qauv sib txawv ntawm A, TPU tuaj yeem muab faib ua hom polyester, hom, polyetrolate hom TPU thiab Polyester Hom TPU.
Los ntawm daim duab saum toj no, peb tuaj yeem pom tias cov kab ke ntau txheej txheem ntawm polyet hom TPU yog cov ntaub mos mos yog cov polyether polyol lossis polyester polyol.
3, Kev sib piv ua tau zoo
Polyether Polyols yog dej cawv polymers lossis oligomers nrog ether cov pawg thiab cov pab pawg hydroxyl ntawm cov pawg molecular tseem ceeb. Vim nws txoj kev sib txuas tsawg ntawm etherers hauv nws cov qauv thiab yooj yim ntawm kev sib hloov.
Yog li ntawd, Polyether TPU muaj qhov qis heev qis-kub, pwm tsis muaj zog, tab sis cov khoom muaj zog thiab lub zog tsis zoo.
Cov pab pawg ester nrog cov kev sib cav sib haum muaj zog hauv polyester polyols tuaj yeem tsim cov saw hlau nyuaj, pabcuam ua cov ntsiab lus elasticinking. Txawm li cas los xij, Polyester yog tus nquag thab vim yog cov kev nkag tau ntawm cov dej lwg me me, thiab cov kua qaub tau ntxiv rau cov hydrolysis tuaj yeem ua rau cov hydrolysis ntawm polyester.
Yog li ntawd, Polyester TPU muaj cov tshuab ua tau zoo, kua muag tiv taus, muaj kuab lom ua tau, tab sis cov dej khov kho yooj yim, tab sis cov hydrolysis tsis zoo.
4, hom phiaj qhia
Raws li rau tus TPU yog qhov zoo dua rau siv, nws tsuas yog hais tau tias kev xaiv yuav tsum yog ua raws cov khoom ntawm lub cev. Yuav kom ua tiav cov khoom siv zoo, siv Polyester TPU; Yog tias txiav txim siab tus nqi, ceev, thiab cov khoom siv cov khoom lag luam, xws li ua cov khoom cog lus dej, polyether TPU yog qhov tsim nyog dua.
Txawm li cas los xij, thaum xaiv, lossis sib xyaw ua ke ob hom TPUS, lawv tsis muaj qhov sib txawv tseem ceeb hauv qhov tsos. Yog li peb yuav tsum sib txawv rau lawv li cas?
Muaj ntau txoj hauv kev, xws li cov tshuaj lom neeg Colourimetry, Roj Chromatography-Pawg Infrared Spectrometry (thiab lwm yam yuav tsum muaj cov kev xav tau zoo thiab siv sijhawm ntev.
Puas muaj cov qauv yooj yim thiab nrawm? Cov lus teb yog muaj, piv txwv li, kev sib piv txoj kev sib piv.
Hom no tsuas yog xav tau ib qho kev sim ua kom tuab. Noj lub siab-precision roj hmab density meter raws li ib qho piv txwv, cov kauj ruam ntsuas yog:
Muab cov khoom tso rau hauv cov rooj ntsuas, tso saib cov khoom hnyav ntawm cov khoom, thiab nias tus sau nkag mus nco ntsoov.
Muab cov khoom ntim rau hauv dej los ua cov nqi ntom ntom nqi.
Tag nrho cov txheej txheem ntsuas yuav siv li 5 vib nas this, thiab tom qab ntawd nws tuaj yeem raug qhov txawv raws li lub ntsej muag ntawm polyester hom TPU yog siab dua li ntawm kev sib tw ntawm TPU. Qhov nthuav tshwj xeeb yog: Polyether Hom TPU -1.13-1.18 G / CM3; Polyester TPU -1.18-1.22 G / CM3. Hom qauv no tuaj yeem paub qhov txawv ntawm TPU polyester hom thiab hom polyether.
Lub Sijhawm Post: Jun-03-2024