Vim li cas MEG Mono Ethylene Glycol siv PET Resin Production?

Monoethylene glycol (MEG), kuj hu ua yooj yim liTom ntej: Ethylene Glycol CAS 107-21-1- yog ib qho ntawm ob qho tseem ceeb monomers uas xav tau rau kev tsim cov polyethylene terephthalate (PET) resin. Yog tsis muaj MEG, tus tsiaj peb paub zoo heev - cov khoom siv dav siv hauv lub raj mis haus, ntim khoom noj, polyester fibers, thiab engineering plastics-yuav tsum tso tseg.

Txawm li cas los xij, vim li cas MEG yog qhov tseem ceeb hauv kev tsim cov PET resin, kom tsis suav nrog lwm cov diols?

Cov lus teb yog nyob rau hauv nws cov qauv molecular tshwj xeeb, tshuaj reactivity, purity yam ntxwv, thiab nws lub peev xwm los tsim kom muaj kev ruaj khov, linearly aligned polymer chains uas muaj kev ua tau zoo tshwj xeeb.

MEG Mono Ethylene Glycol yog dab tsi?

Monoethylene Glycol, feem ntau hu ua MEG, yog cov xim tsis muaj xim, tsis muaj ntxhiab, thiab cov organic sib xyaw nrog cov tshuaj formula C₂H₆O₂. Nws yog cov tswv cuab yooj yim tshaj plaws ntawm tsev neeg ethylene glycol, ib pawg ntawm diol compounds (piv txwv li, cov tebchaw uas muaj ob pawg hydroxyl, -OH). MEG paub zoo rau nws txoj kev siv dav hauv kev tsim cov tshuaj tiv thaiv kab mob, polyester fibers, thiab ntau yam kev lag luam.

Puas yog Ethylene Glycol thiab Monoethylene Glycol tib yam?

Yog lawm, lawv yog cov tib yam sib xyaw. "Monoethylene glycol" tsuas yog nws lub npe tshuaj meej meej, npaj kom paub qhov txawv ntawm ntau yam -unit compounds xws li diethylene glycol (DEG) lossis triethylene glycol (TEG).

Basic Chemical Information

• Cov tshuaj formula: C₂H₆O₂
• Boiling Point: 197 degree
• Solubility: Ua tiav miscible hauv dej
• Viscosity: Muab kev ruaj ntseg thiab ua haujlwm nyob rau hauv thermal stress

Vim tias cov khoom no, MEG tsis yog cov khoom siv raw xwb; nws yog ib qho kev ua tau zoo uas txhawb nqa cov txiaj ntsig zoo ib yam thiab kev ntseeg siab ntawm cov khoom hauv siab - ntim ntau lawm ib puag ncig.

CAS 107-21-1 MEG Raw Khoom Muag hauv Suav teb

MEG siv los ua PET Fibers li cas?

PET (polyethylene terephthalate) yog tsim los ntawm kauj ruam -kev loj hlob polymerization, qhov twg ob lub ntsiab lus teb:
MEG (diol tivthaiv, monoethylene glycol)
PTA los yog DMT (cov tshuaj diacid, purified terephthalic acid los yog dimethyl terephthalate)

Kauj ruam 1:

Esterification (PTA Route) Thawj cov tshuaj tiv thaiv sib xyaw ua ke PTA thiab MEG los ua BHET, qhov tseem ceeb hauv nruab nrab lub tsev thaiv:
HOOC-C6H4-COOH + 2HOCH2CH2OH ->BHET + 2H2O
Hauv theem no, purified terephthalic acid reacts nrog monoethylene glycol los tsim bis -hydroxyethyl terephthalate (BHET), nrog rau cov dej ua cov khoom lag luam. BHET ua lub hauv paus rau cov kauj ruam tom ntej polymerization.

Kauj ruam 2:

PolycondensationBHET tom qab ntawd nkag mus rau polycondensation los ua tus PET polymer kawg:
n BHET ->PET + n HOCH2CH2OH
Thaum lub sij hawm tseem ceeb no:
Polymer chains txuas ntxiv thiab loj hlob ntev
MEG raug tso tawm raws li cov khoom lag luam, uas feem ntau rov qab los thiab rov ua dua tshiab hauv cov txheej txheem kev lag luam
Qhov hnyav molecular ntawm lub polymer nce ntau
Cov kauj ruam no qhia ncaj qha rau PET cov khoom kawg, suav nrog nws cov khoom siv dag zog thiab cov viscosity intrinsic (IV) - cov ntsuas tseem ceeb uas txiav txim siab nws qhov kev ua tau zoo hauv fibers, fwj, thiab cov yeeb yaj kiab.

Vim li cas MEG Yog Tshuaj Zoo Zoo rau PET Production

1. Bifunctional Structure Enables Linear Polymer Chains

Ntawm qib molecular, MEG (monoethylene glycol) muaj ob pawg hydroxyl reactive nyob rau ntawm qhov kawg ntawm nws cov qauv. Qhov no tso cai rau nws sib txuas nrog terephthalic acid ntawm ob sab, tsim ntev, ncaj polymer chains es tsis yog cov qauv tsim.
Cov kab ke no yog qhov ua rau PET nws nrhiav tau tshaj plaws -tom qab cov khoom:
Siab tensile zog
Pob tshab zoo heev
Tswj crystallinity
Superior fiber ntau spinnability rau textiles

2. Zoo tagnrho Molecular Size rau Kev Ua Haujlwm Zoo

MEG yog ib qho ntawm cov glycols tsawg tshaj plaws siv nyob rau hauv kev lag luam polymer ntau lawm, thiab qhov compact loj no coj qhov tseem ceeb ua kom zoo:

• Faster diffusion nyob rau hauv molten polymer sib tov
• Txhim kho cov tshuaj tiv thaiv kinetics thoob plaws hauv cov txheej txheem
• Tsawg zog thaiv rau thawj kauj ruam esterification
• Ntau npaum polycondensation

Cov txiaj ntsig no txhais tau ncaj qha rau cov khoom siv hluav taws xob ntau dua, ua kom loj - teev PET kev tsim khoom sai dua thiab raug nqi ntau dua - zoo.

3. High Purity Compatibility nrog zaub mov -Qib PET
PET siv rau lub raj mis thiab ntim khoom noj xav tau cov ntaub ntawv ntshiab heev, thiab MEG tsis muaj qhov tshwj xeeb. Txawm tias me me impurities tuaj yeem ua rau muaj teeb meem zoo, suav nrog:

• Resin yellowing
• Acetaldehyde tsim (uas cuam tshuam rau saj thiab tsw)
• Txo pob tshab
• Accelerated polymer degradation

Vim li no, zaub mov- qib PET ntau lawm yuav tsum tau siab -MEG zoo uas ua tau raws li cov lus qhia nruj:
Cov ntsiab lus dej tsawg heev
Tswj qib ntawm diethylene glycol (DEG)
Tsawg aldehyde impurities
High UV transmittance

Xaus

MEG mono ethylene glycol yog ib qho tshuaj tseem ceeb hauv kev tsim cov tsiaj tsiaj, pab tsim cov polyester fibers thiab resins ruaj khov thiab ntau yam. Lub purity ntawm MEG chemical plays lub luag haujlwm tseem ceeb hauv kev txiav txim siab zoo ntawm PET cov khoom, ua rau nws tseem ceeb heev rau cov tuam txhab siv high-cov ntaub ntawv purity los tsim cov khoom muaj zog, meej, thiab txhim khu kev qha rau ntau yam kev lag luam.

Hais txog peb

Raws li ib tug ua chaw tsim tshuaj paus thiab exporter ntawm tshuaj solvent,TIANJIN GNEE BIOTECH CO., LTD.muab siab -cov tshuaj muaj txiaj ntsig zoo. Peb muab rau cov neeg siv khoom thoob plaws kev lag luam tshuaj, tshuaj, thiab cov khoom siv, ua kom zoo ib yam, txhim khu kev qha logistics, thiab kev txhawb nqa kev tshaj lij.

Peb cov khoom siv tshuaj muaj ntawv pov thawj thoob ntiaj teb (REACH, ISO, FMQS, HALAL) rau kev lees paub thoob ntiaj teb. Peb muaj warehouses nyob rau hauv coreports xws li Qingdao, Tianiin, thiab Shanghai, nrog ib tug 15-hnub kev pab xa khoom.

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