Le Fa'aleleia Atili o le Gaosiga o le HTPB, CTBN ma le DDI (Dimeryl Diisocyanate)
O le a HTPB ?
HTPB e ta'ua fo'i o polibutadiene ua fa'amutaina i le hydroxyl (CAS Nu. 69102-90-5), o se pa'u vai fou (resin), O lo'o iai i le HTPB ni vaega hyroxyl e tali atu. E mafai ona tali atu ma le sui fa'alauteleina o filifili, sui fa'afeso'ota'i i le vevela o le potu po'o le vevela maualuga e fa'atupu ai le fausaga feso'ota'iga 3D o mea e fa'amalolo ai ma meatotino fa'ainisinia sili ona lelei.
O uiga fa'atino o le HTPB e pei o: Hydrophobicity, Reactive hyroxyl groups, Low glass transition temperature, Low color - high clarity viscous liquid, Tete'e i le hydrolysis,
Tete'e maualalo i le vevela, E le mafai ona sosolo i le susu, Tete'e i 'asita ma fa'avae vai, Tete'e malosi i le ofuina, Pipi'i lelei i le tele o mea eseese, Meatotino e tete'e ai i le eletise, Meatotino fa'ainisinia lelei e fa'aaogaina lautele i:
- Ufiufi
- Mea fa'apipi'i
- Mea fa'aola
- Meafaitino Polyurethane (PU)
- Mea Fa'apipi'i
- Mea fa'amaufa'ailoga
- Mea e fa'amafanafana ai le eletise
- Oloa pa'u
- Mea faufale i taavale ma vaalele
- Mea fau fale (e le susu, e tete'e i le 'ele, e fa'amafanafana ai le vevela)
- Fa'aputuina ma fa'apipi'i
- Suiga o le Polymer
- ma le tele o isi ituaiga o faʻaaogaina.
O le a CTBN ?
CTBN iloa fo'i o copolymer butadiene-acrylonitrile ua fa'ama'a'aina i le carboxyl (CAS Nu. 25265-19-4 po'o le 68891-46-3), o le vaega carboxyl o lona vaega galuega, e mafai ona faʻaaogaina lautele i vaalele ma vaega tau alamanuia sivili. Ona o le vaega malosi o le carboxyl-terminated e mafai ai ona tali atu i le epoxy resin e faʻaleleia atili ai le malosi.
O uiga o le CTBN e pei o: Fa'aleleia atili le malosi ma le fetu'una'i o resins thermoset, Fa'aleleia atili le pipii i mea e faigata ona pipii i ai, Fa'ateleina le tete'e atu i le pa'u ma le māvaevae, Fa'aleleia le tumau (tete'e atu i le vaivai), Fa'ateleina meatotino fa'ainisinia i le vevela maualalo, ma isi mea fa'apena e fa'aaogaina lautele ai i:
1. Mea fa'apipi'i, fa'apipi'i, fa'amaufa'ailogaina, fa'asusuina, fa'apipi'iina i totonu o ulo (va'alele, ta'avale, eletise/eletise, fale gaosi oloa, gataifale ma faufale..)
2. Ufiufi (vai, pauta, vai e tafe mai)
3. O le CTBN o le malosi mo le epoxy resin, ma o se suiga sili ona lelei i le fetuutuuna'i mo thermosetting resins e pei o le epoxy, phenolic, unsaturated polyester ma photosensitive resins.
O le a LEAI ?
LEAI iloa fo'i o Dimeryl Diisocyanate CAS Numera 68239-06-5, O le DDI o se aliphatic diisocyanate tulaga ese e mafai ona faʻaaogaina e saunia ai polymers ma vailaʻau o loʻo i ai le hydrogen active. O se vailaʻau umi-chain ma se 36-carbon dimer fatty acid backbone. O le fausaga autu o le filifili e maua ai e le DDI le fetuutuunai sili, teteʻe i le vai ma le maualalo o le oona i isi aliphatic isocyanates. O le DDI o se vai maualalo le viscosity e faigofie ona solo i le tele o solvents polar poʻo non-polar. Talu ai ona o le aliphatic isocyanate, e iai uiga o le le samasama. E tele ona lelei o le maualalo o le oona, faigofie ona faʻaaoga, solo i le tele o solvents, taimi tali pulea ma le maualalo o le maaleale i le vai. O se ituaiga masani o le biorenewable green special isocyanate, lea e mafai ona faʻaaogaina lautele i le faʻauma o ie, elastomers, adhesives ma sealants, coatings, inks ma isi vaega militeri ma sivili.
Ua matou fa'aleleia atili le gaosiga o le HTPB, CTBN ma le DDI (Dimeryl Diisocyanate) ina ia fa'aleleia atili ai la latou fa'atinoga, ma fa'ateleina ai le tau fa'atauva pe a fa'atusatusa i le Poly BD R45 HTLO, Huntsman 1300X13 (Hypro 1300X13 CTBN).
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