Cov Qauv Siv Hluav Taws Xob Rau Cov Nplaum Thermosetting Acrylic
Yuav kom ua tau raws li UL94 V0 cov kev cai tiv thaiv hluav taws rau cov nplaum acrylic thermosetting, xav txog cov yam ntxwv ntawm cov nplaim taws uas twb muaj lawm thiab cov yam ntxwv ntawm cov thermosetting systems, cov qauv zoo tshaj plaws thiab kev tshuaj xyuas tseem ceeb hauv qab no tau muab tso rau:
I. Cov Ntsiab Cai Tsim Qauv & Cov Kev Cai ntawm Lub Tshuab Thermosetting
- Yuav tsum sib npaug rau qhov kub kho (feem ntau 120–180 ° C)
- Cov tshuaj tiv thaiv hluav taws yuav tsum tiv taus kev ua haujlwm kub siab (zam tsis txhob ua kom puas tsuaj)
- Xyuas kom meej tias muaj kev ruaj khov ntawm kev sib kis hauv cov kab ke sib txuas siab
- Sib npaug lub zog kho tom qab kho thiab kev ua haujlwm tsis kub hnyiab
II. Kev Tsim Qauv Hluav Taws Xob Synergistic
Cov Haujlwm Tiv Thaiv Hluav Taws Kub & Kev Sib Xws ntawm Thermoset
| Hluav Taws Kub Tiv Thaiv | Lub Luag Haujlwm Tseem Ceeb | Kev Sib Tw Thermoset | Kev Thauj Khoom Pom Zoo |
|---|---|---|---|
| ATH zoo heev | Main FR: Endothermic dehydration, gas-phase dilution | Yuav tsum tau hloov kho qhov chaw (tiv thaiv kev sib sau ua ke) | ≤35% (kev thauj khoom ntau dhau ua rau txo qhov sib txuas) |
| Aluminium hypophosphite | Synergist: Char catalyst, radical scavenger (PO·) | Kub yaj > 300°C, tsim nyog rau kev kho | 8–12% |
| Zinc borate | Cov tshuaj ua kom char enhancer: Tsim cov iav thaiv, txo cov pa luam yeeb | Ua haujlwm nrog ATH (Al-BO char) | 5–8% |
| MCA (Melamine cyanurate) | Gas-theem FR: Tso tawm NH₃, tiv thaiv kev kub hnyiab | Kub yaj: 250–300°C (kub kho: <250°C) | 3–5% |
III. Cov Qauv Pom Zoo (Qhov Hnyav %)
Cov Lus Qhia Txog Kev Ua Cov Cheebtsam
| Cheebtsam | Qhov sib piv | Cov Lus Cim Txog Kev Ua Cov Ntsiab Lus Tseem Ceeb |
|---|---|---|
| Cov thermoset acrylic resin | 45–50% | Hom viscosity qis (piv txwv li, epoxy acrylate) rau kev thauj khoom siab |
| ATH hloov kho qhov chaw (D50 <5µm) | 25–30% | Kho ua ntej nrog KH-550 silane |
| Aluminium hypophosphite | 10–12% | Ua ntej sib xyaw nrog ATH, ntxiv rau hauv cov khoom ua ke |
| Zinc borate | 6–8% | Ntxiv nrog MCA; zam kev puas tsuaj siab-shear |
| MCA | 4–5% | Kev sib tov qeeb qeeb theem kawg (<250°C) |
| Dispersant (BYK-2152 + PE ciab) | 1.5–2% | Xyuas kom meej tias cov khoom sib xyaw ua ke |
| Tus neeg sawv cev txuas (KH-550) | 1% | Kho ua ntej rau ATH/hypophosphite |
| Tus neeg sawv cev kho (BPO) | 1–2% | Low-temp activator rau kev kho sai |
| Tshuaj tiv thaiv kev sib sau ua ke (Aerosil R202) | 0.5% | Thixotropic tiv thaiv kev ua kom av noo |
IV. Kev Tswj Xyuas Cov Txheej Txheem Tseem Ceeb
1. Cov Txheej Txheem Kev Tawm Tsam
- Kev kho mob ua ntej: ATH & hypophosphite ntub rau hauv 5% KH-550 / ethanol kua (2 teev, 80 ° C ziab)
- Kev sib xyaw ua ke:
- Resin + dispersant → Kev sib tov qeeb qeeb → Ntxiv cov ATH/hypophosphite hloov kho → Kev sib tov qeeb qeeb (2500 rpm, 20 feeb) → Ntxiv zinc borate/MCA → Kev sib tov qeeb qeeb (zam kom tsis txhob MCA puas tsuaj)
- Khoom siv: Planetary mixer (vacuum degassing) los yog peb-yob zeb (rau cov hmoov ultrafine)
2. Kev Kho Kom Zoo Dua
- Kev kho kom zoo li qub: 80°C/1 teev (ua ntej-gel) → 140°C/2 teev (tom qab kho, tsis txhob muab MCA decomposition)
- Kev tswj siab: 0.5–1 MPa kom tiv thaiv cov khoom sau kom tsis txhob poob
3. Cov Txheej Txheem Sib Koom Tes
- ATH + Hypophosphite: Tsim cov AlPO₄-reinforced char thaum scavenging radicals (PO·)
- Zinc borate + MCA: Gas-khoom ob chav thaiv (NH₃ dilution + molten glassy txheej)
V. Cov Tswv Yim Txhim Kho Kev Ua Tau Zoo
Cov Teeb Meem thiab Kev Dais Teeb Meem Feem Ntau
| Qhov teeb meem | Qhov Ua Rau Muaj Teeb Meem | Kev daws teeb meem |
|---|---|---|
| Kev kub hnyiab | Cov viscosity yaj tsawg | Nce MCA mus rau 5% + hypophosphite mus rau 12%, lossis ntxiv 0.5% PTFE micropowder |
| Kev tawg ntawm cov khoom tom qab kho | Kev thauj khoom ATH ntau dhau | Txo ATH rau 25% + 5% nano-CaCO₃ (toughening) |
| Kev khaws cia cov dej noo | Kev tsis muaj thixotropy zoo | Ua kom silica nce mus txog 0.8% lossis hloov mus rau BYK-410 |
| LOI <28% | Tsis txaus roj-theem FR | Ntxiv 2% coated liab phosphorus los yog 1% nano-BN |
VI. Cov Kev Ntsuas Kev Pom Zoo
- UL94 V0: 3.2 hli cov qauv, tag nrho cov nplaim taws lub sijhawm <50 s (tsis muaj paj rwb ignition)
- LOI ≥30% (qhov kev nyab xeeb)
- TGA residue > 25% (800 ° C, N₂)
- Kev sib npaug ntawm lub cev: Lub zog tensile > 8 MPa, lub zog shear > 6 MPa
Cov Ntsiab Lus Tseem Ceeb
- Ua tiav qhov ntsuas V0 thaum tseem tswj tau kev ua haujlwm zoo.
- Pom zoo kom noj me me (50g) ua ntej yuav ntsuas.
- Rau kev ua tau zoo dua: 2–3% DOPO derivatives (piv txwv li, phosphaphenanthrene) tuaj yeem ntxiv tau.
Cov mis no ua kom ntseeg tau tias ua raws li cov qauv hluav taws kub nruj thaum ua kom zoo dua qhov ua tau zoo thiab kev siv kawg.
Lub sijhawm tshaj tawm: Lub Xya Hli-01-2025
