Nhazi ihe na-egbochi ire ọkụ maka ihe na-eme ka akịrịka acrylic dị nro
Iji mezuo ihe achọrọ maka ihe na-egbochi ọkụ UL94 V0 maka ihe na-ejikọ acrylic na thermosetting, na-atụle njirimara nke ihe na-egbochi ọkụ dị ugbu a na nkọwapụta nke sistemụ thermosetting, a na-atụ aro usoro kachasị mma na nyocha dị mkpa ndị a:
I. Ụkpụrụ Nhazi Nhazi na Ihe Ndị Dị Mkpa Maka Sistemụ Nhazi Thermosetting
- Ọ ga-adaba na okpomọkụ a na-ekpo ọkụ (karịsịa 120-180°C)
- Ihe ndị na-egbochi ire ọkụ ga-anagide nhazi okpomọkụ dị elu (zere ọdịda ire ere)
- Hụ na mgbasa kwụsiri ike na sistemụ njupụta njikọ dị elu
- Nhazi ike igwe mgbe a gwọchara ya na arụmọrụ ire ọkụ
II. Nhazi Sistemụ Na-egbochi Ọkụ Na-arụkọ Ọrụ
Ọrụ Mgbochi Ọkụ na Ndakọrịta Thermoset
| Ihe na-egbochi ire ọkụ | Ọrụ Isi | Ndakọrịta nke Thermoset | Ibugo akwadoro |
|---|---|---|---|
| ATH dị oke mma | Isi FR: Mmiri mmiri ozuzo endothermic, mmịpụta gas-phase | Chọrọ mgbanwe elu (mgbochi agglomeration) | ≤35% (oke ibu na-ebelata njikọ) |
| Aluminom hypophosphite | Onye Mmekọ: Char catalyst, ihe na-achụpụ ihe n'ike (PO·) | Okpomọkụ nkewapụ ihe karịrị 300°C, dị mma maka ịgwọ ọrịa | 8–12% |
| Zinc borate | Ihe na-eme ka Char dịkwuo mma: Na-emepụta ihe mgbochi iko, na-ebelata anwụrụ ọkụ | Na-emekọrịta ihe na ATH (Al-BO char) | 5–8% |
| MCA (melamine cyanurate) | Usoro Gas-phase FR: Na-ewepụta NH₃, na-egbochi ọkụ | Okpomọkụ nkewapụ. 250–300°C (okpomọkụ nkewapụ. <250°C) | 3–5% |
III. Usoro akwadoro (Ibu %)
Ntuziaka Nhazi Akụkụ
| Akụkụ | Oke | Ihe ndetu nhazi isi |
|---|---|---|
| Resin acrylic Thermoset | 45–50% | Ụdị viscosity dị ala (dịka ọmụmaatụ, epoxy acrylate) maka ibu ihe njupụta dị elu |
| ATH agbanwere n'elu (D50 <5µm) | 25–30% | Ejiri KH-550 silane gwọọ ya tupu oge eruo |
| Aluminom hypophosphite | 10–12% | Agwakọta ya na ATH tupu oge eruo, etinyere ya n'ọkwa dị iche iche |
| Zinc borate | 6–8% | Agbakwunyere ya na MCA; zere mmebi nke oke ibu |
| MCA | 4–5% | Ngwakọta obere ọsọ nke oge ikpeazụ (<250°C) |
| Nkesa (BYK-2152 + PE wax) | 1.5–2% | Na-ahụ na mgbasa nke ihe njupụta otu nha |
| Ihe na-ejikọ ọnụ (KH-550) | 1% | A gwọrọ ya na ATH/hypophosphite tupu oge eruo |
| Ihe na-agwọ ọrịa (BPO) | 1–2% | Ihe na-eme ka ọkụ dị obere maka ịgwọ ngwa ngwa |
| Ihe na-egbochi nsogbu (Aerosil R202) | 0.5% | Mgbochi mgbochi thixotropic |
IV. Njikwa Usoro Dị Mkpa
1. Usoro Mgbasa
- Ọgwụgwọ tupu oge eruo: ATH na hypophosphite mikpuru na mmiri 5% KH-550/ethanol (awa 2, 80°C nkụ)
- Usoro ngwakọta:
- Resin + dispersant → Ngwakọta dị ala → Tinye ATH/hypophosphite agbanwere → Mgbasa dị elu (2500 rpm, nkeji 20) → Tinye zinc borate/MCA → Ngwakọta dị ala (zere mmebi MCA)
- Ngwa: Ngwakọta mbara ala (mkpọsa ikuku) ma ọ bụ igwe igwe mpịakọta atọ (maka ntụ ntụ ultrafine)
2. Nhazi Ọgwụgwọ
- Ọgwụgwọ usoro: 80°C/1h (pre-gel) → 140°C/2h (mgbe ọgwụgwọ gasịrị, zere mmebi MCA)
- Njikwa nrụgide: 0.5–1 MPa iji gbochie ihe njupụta ka ọ daa
3. Usoro Mmekọrita
- ATH + Hypophosphite: Na-emepụta AlPO₄-eme ka char sie ike ebe ọ na-achụpụ ihe ndị na-akpata radicals (PO·)
- Zinc borate + MCA: Ihe mgbochi abụọ siri ike nke gas (NH₃ dilution + oyi akwa iko gbazere agbaze)
V. Atụmatụ Nhazi Arụmọrụ
Nsogbu na Ngwọta Ndị A Na-ahụkarị
| Nsogbu | Mgbọrọgwụ | Ngwọta |
|---|---|---|
| Mgbanye ọkụ na-adapụ | Viskọstụ agbaze dị ala | Mee ka MCA dị elu ruo 5% + hypophosphite ruo 12%, ma ọ bụ tinye ntụ ntụ PTFE 0.5% |
| Nsogbu ike mgbe ọgwụgwọ gasịrị | Ibu ATH gabigara ókè | Belata ATH ruo 25% + 5% nano-CaCO₃ (na-eme ka ọ sie ike) |
| Nchekwa sedimentation | Ọkpụkpụ thixotropi adịghị mma | Mee ka silica dịkwuo elu ruo 0.8% ma ọ bụ gbanwee gaa na BYK-410 |
| LOI <28% | Ezughi oke nke usoro gas FR | Tinye phosphorus uhie a kpuchiri ekpuchi nke 2% ma ọ bụ 1% nano-BN |
VI. Usoro Nnwale
- UL94 V0: ihe nlele 3.2 mm, oge ọkụ zuru oke <50 s (anaghị agba ọkụ owu)
- LOI ≥30% (oke nchekwa)
- Ihe fọdụrụ TGA>25% (800°C, N₂)
- Nhazi igwe: Ike nrụgide > 8 MPa, ike ịkwa akwa > 6 MPa
Ihe Ndị Dị Mkpa Ị Ga-eburu n'Obi
- Na-enweta ọkwa V0 ma na-ejigide iguzosi ike n'ezi ihe nke igwe.
- A na-atụ aro ka a nwalee obere ihe (50g) tupu e jiri ya mee ihe.
- Maka arụmọrụ ka mma: enwere ike itinye 2–3% nke ihe ndị sitere na DOPO (dịka ọmụmaatụ, phosphaphenanthrene).
Usoro a na-ahụ na e rubere ụkpụrụ siri ike nke na-egbochi ire ọkụ isi, ebe ọ na-eme ka usoro nhazi na arụmọrụ ojiji ya ka mma.
Oge ozi: Julaị-01-2025
