Fomu Yofotokozera Yoletsa Moto Yopanda Halogen ya PBT

Fomu Yofotokozera Yoletsa Moto Yopanda Halogen ya PBT

Kuti muwongolere kapangidwe ka zinthu zoletsa moto zopanda halogen za PBT, ndikofunikira kuti pakhale kulinganiza bwino momwe zinthu zimagwirira ntchito, kukhazikika kwa kutentha, kuyanjana kwa kutentha, komanso mawonekedwe a makina. Pansipa pali njira yabwino yopangira zinthu pogwiritsa ntchito kusanthula kwakukulu:

1. Kuphatikiza Kosatha kwa Moto Wapakati

Njira 1: Aluminium Hypophosphite + MCA (Melamine Cyanurate) + Zinc Borate

Njira:

• Aluminium Hypophosphite (Kukhazikika kwa kutentha > 300°C): Imalimbikitsa kupangika kwa char mu gawo lofupikitsidwa ndikutulutsa ma PO· radicals mu gawo la mpweya kuti asokoneze machitidwe a unyolo woyaka.
• MCA (Kuwola pa ~300°C): Kuwola kwa endothermic kumatulutsa mpweya wosagwira ntchito (NH₃, H₂O), kumachepetsa mpweya woyaka ndikuletsa kutuluka kwa madzi osungunuka.
• Zinc Borate (Kuwola > 300°C): Imawonjezera kupangika kwa ma char ngati galasi, kuchepetsa utsi ndi kuwala kwa dzuwa.

Chiŵerengero Chovomerezeka:

• Aluminium Hypophosphite (10-15%) + MCA (5-8%) + Zinc Borate (3-5%).

Njira yachiwiri: Magnesium Hydroxide Yosinthidwa Pamwamba + Aluminium Hypophosphite + Organic Phosphinate (monga, ADP)

Njira:

• Magnesium Hydroxide Yosinthidwa (Kuwola ~300°C): Kukonza pamwamba (silane/titanate) kumathandizira kufalikira ndi kukhazikika kwa kutentha; kuzizira kwa endothermic kumachepetsa kutentha kwa zinthu.
• Organic Phosphinate (monga, ADP, kutentha kokhazikika > 300°C): Yogwira ntchito bwino kwambiri yoletsa moto wa gasi, yogwirizana ndi machitidwe a phosphorous-nitrogen.

Chiŵerengero Chovomerezeka:

• Magnesium Hydroxide (15-20%) + Aluminium Hypophosphite (8-12%) + ADP (5-8%).

2. Ogwirizana Osankha

• Nano-clay/Talc (2-3%): Imawongolera khalidwe la char ndi mphamvu zamakina pamene imachepetsa katundu woletsa moto.
• PTFE (0.2-0.5%): Choletsa kudontha kwa madzi kuti asapse madontho a madzi.
• Ufa wa silikoni (2-4%): Umalimbikitsa kupangika kwa ma char ochuluka, kukulitsa kuchedwa kwa moto ndi kunyezimira kwa pamwamba.

3. Kuphatikiza Koyenera Kupewa

• Aluminiyamu Hydroxide: Imawola pa 180-200°C (kutsika kwa kutentha kwa PBT processing kwa 220-250°C), zomwe zimapangitsa kuti iwonongeke msanga.
• Magnesium Hydroxide Yosasinthidwa: Imafunika kukonza pamwamba kuti ipewe kusonkhana ndi kuwola kwa kutentha panthawi yokonza.

4. Malangizo Okonza Magwiridwe Antchito

• Chithandizo cha pamwamba: Gwiritsani ntchito zinthu zolumikizira za silane pa Mg(OH)₂ ndi zinc borate kuti muwonjezere kufalikira ndi kulumikiza kwa interfacial.
• Kuwongolera Kutentha: Onetsetsani kuti kutentha kwa moto woletsa kuwonongeka kuli pamwamba pa 250°C kuti musawonongeke.
• Kuwerengera Katundu wa Makina: Lipirani mphamvu yotayika pogwiritsa ntchito ma nano-fillers (monga, SiO₂) kapena ma tougheners (monga, POE-g-MAH).

5. Chitsanzo Chopangira

6. Ziyeso Zofunika Kwambiri Zoyesera

• Kubwerera kwa Lawi: UL94 V-0 (1.6mm), LOI > 35%.
• Kukhazikika kwa Kutentha: Zotsalira za TGA > 25% (600°C).
• Kapangidwe ka Makina: Mphamvu yolimba > 45 MPa, kukhudza kocheperako > 4 kJ/m².

Mwa kukonza bwino ma ratios, kuchedwa kwa moto wopanda halogen kumatha kuchitika pamene PBT ikugwira ntchito bwino.

More info., pls send email to lucy@taifeng-fr.com