Polyester thiab TDI siab -kev ua tau zoo polyurethane prepolymer, hardness 85A, 94A
PTMEG thiab TDI siab -kev ua tau zoo polyurethane prepolymer, hardness 85A, 94A
Qhov sib txawv ntawm PTMEG Prepolymer thiab Polyester Prepolymer 95A
Ntim: 200kgs / nruas
1. Qhov txawv ntawm tus qauv tsim
- PTMEG Prepolymer (Polyether Type): Nws cov ntu mos yog cov saw hlau polyether nrog rov ua dua chav tsev -O-(CH₂)₄- . Cov saw tseem ceeb muaj cov ntawv cog lus ether (-O-), ua ke ntawm lub nplhaib{{6} ntawm traction.
- Polyester Prepolymer (Polyester Hom): Nws cov ntu mos yog cov hlua polyester nrog rov ua dua tshiab -COO-(CH₂)ₙ- . Cov saw tseem ceeb muaj cov ester bonds (-COO-), uas tsim los ntawm polycondensation ntawm dibasic acids thiab diols.
2. Cov khoom tseem ceeb sib piv
- Hydrolysis tsis kam: PTMEG - Zoo heev (kev ruaj khov ether bonds, kev pab cuam lub neej tshaj 10 xyoo hauv dej); Polyester - Tsis zoo (ester bonds nquag hydrolysis, 3-5 xyoo nyob rau hauv ib puag ncig ntub).
- Tsawg-kub toughness: PTMEG - Zoo heev (iav hloov pauv kub ≈ -80 degree, tseem hloov tau ntawm -30℃); Polyester - Tsis zoo (nkaws hauv qab -20 degree).
- Mechanical zog: PTMEG - Nruab nrab; Polyester - Siab (lub zog tensile zoo tshaj, hnav tsis kam thiab tsim kua muag).
- Roj & hnyav kuj: PTMEG - Nruab Nrab; Polyester - Zoo heev (tiv taus rau cov roj cav thiab tsis yog - cov kuab tshuaj polar).
- Elasticity & resilience: PTMEG - Zoo heev (rov qab sai, ruaj khov deformation <5%); Polyester - zoo.
- Thaum tshav kub kub & kev laus tiv thaiv: PTMEG - Zoo tiv thaiv ozone thiab mildew; Polyester - Zoo thermal stability thiab oxidation kuj.
3. Synthesis & processing yam ntxwv
- PTMEG Prepolymer: Cov qauv tawm, nqaim molecular hnyav faib (PDI: 1.05–1.2), viscosity tsawg thiab ua haujlwm yooj yim. Waxy ntawm chav tsev kub, hloov cov kua pob tshab thaum rhuab.
- Polyester Prepolymer: Ntau dua viscosity, dav molecular hnyav faib thiab me ntsis acid nqi. Kev tswj cov dej kom nruj yog tsim nyog los tiv thaiv hydrolysis; feem ntau nthuav tawm raws li viscous kua.
4. Cov ntawv thov ib txwm
- PTMEG Prepolymer: Spandex fibers, qis- qhov kub thiab txias sealing qhov chaw, hluav taws kub hoses, underwater cables, sab nraum zoov elastomers.
- Polyester Prepolymer: Siab- hnav khau khau, siv tawv conveyor, rollers, sealing qhov chaw, FDA-cov zaub mov raws cai- tiv tauj cov khoom.
5. Cov ntsiab lus
PTMEG prepolymer nta zoo heev hydrolysis tsis kam, qis -kub yooj yooj yim thiab siab resilience. Polyester prepolymer muab cov neeg kho tshuab siab zog, hnav zoo heev & roj tsis kam thiab zoo thermal stability. thiab TDI siab -kev ua tau zoo polyurethane prepolymer, hardness 85A, 94A