Ndị Oligomers Pụrụ Iche Na-arụ Ọrụ

1.Ndị Oligomers Ọgwụgwọ Abụọ

Ọ bụrụ na oligomer nwere ụdị otu ọrụ abụọ dị iche iche maka ọgwụgwọ, dị ka otu acrylate nke nwere ike ịnweta ọgwụgwọ free-radical, na otu ọzọ nke nwere ike ịnweta fotocuring cationic, ọgwụgwọ mmiri, ọgwụgwọ hydroxyl, ma ọ bụ ọgwụgwọ okpomọkụ, mgbe ahụ a na-akpọ ya oligomer ọgwụgwọ abụọ.

Site na iji bisphenol A epoxy resin na acrylic acid mee ihe n'ime mmeghachi omume esterification nke na-emepe mgbanaka [otu epoxy: carboxyl group = (1.5 ~ 2.0): 1, molar ratio], a na-akwadebe resin epoxy acrylate nke nwere otu epoxy. Otu acrylic nwere ike ịnweta polymerization free-radical, ebe otu epoxy nwere ike ịnweta photopolymerization cationic ma ọ bụ ọgwụgwọ okpomọkụ. Nsonaazụ nyocha na-egosi na enwere mmekọrịta intramolecular n'etiti otu ọrụ abụọ a na-arụ ọrụ, nke nwere ike ịkwalite ọganihu nke free-radical na cationic photopolymerization nke ọma, na-eme ka ọnụego mmeghachi omume na ọnụego mgbanwe ikpeazụ dịkwuo mma, ebe ọ na-ebelata oke mgbochi oxygen. Ihe nkiri a gwọrọ nke oligomers dual-cure mepụtara na-egosipụta njirimara igwe ka mma.

Site n'iji N,N-bis (3-aminopropyltriethoxysilane) meghachi omume na hexamethylene diisocyanate, wee soro ya meghachi omume na hydroxyethyl acrylate, a pụrụ ịkwadebe polyurethane acrylate ụdị siloxane nke nwere ma fotocuring free-radical na mmiri-agwọ dual-agwọ. Enwere ike iji nke a mee ihe na mkpuchi photocurative a na-agwọ.

Njikọta nke phenolic epoxy acrylate resins nke nwere otu epoxy na-eme ka ihe ndị nwere ọrụ photocuring free-radical na thermal curing dual-cure rụọ ọrụ, nke enwere ike iji na photoimage solder resist.

2.Ndị Oligomers Na-amalite Onwe Ha

E nwere ụdị oligomers abụọ nwere ọrụ ndị na-ebido onwe ha:

1. Oligomer n'onwe ya nwere ikike ime ka foto malite, yabụ ọ dịghị mkpa itinye foto mmalite ọzọ ma ọ bụ ọbụna ọ dịghị mkpa itinye ya na nhazi ahụ.
2. A na-etinye otu fotoinitiating n'ime oligomer, na-agbanwe ya ka ọ bụrụ macromolecular photoinitiator nke na-arụ ọrụ ma dị ka oligomer na dị ka photoinitiator n'ime usoro ahụ.

Ụdị mbụ nke oligomer nke na-amalite onwe ya bụ ngwaahịa ọhụrụ nke ụlọ ọrụ America bụ Ashland mepụtara. A na-akwadebe ya site na mmeghachi omume mgbakwunye Michael n'etiti multifunctional acrylate esters na β-ketoesters (dịka ethyl acetoacetate, allyl acetoacetate, na 2-acetoacetoacetoxyethyl methacrylate). Carbon methylene na-arụ ọrụ na β-ketoester na-emepụta njikọ covalent ọhụrụ na carbon end nke njikọ carbon-carbon double nke acrylate. Otu carbonyl dị na β-ketoester jikọtara ya na atọm carbon edochiri anya. Njikọ a anaghị akwụsi ike n'okpuru ìhè ultraviolet. Mgbe ọ nara ìhè UV, ọ na-agbaji ngwa ngwa, na-emepụta radikal acetyl na radikal free macromolecular ọzọ, si otú a na-enye ikike ịmalite onwe ya.

Ya mere, n'ime ihe mkpuchi UV, ink, na ihe nrapado e ji oligomers ndị na-emepụta onwe ha mepụta, ọ dịghị mkpa ka e tinye fotoiniti ọzọ ma ọ bụ ghara inwe ya. Nke a na-ezere nsogbu ndị dị ka isi ísì, ịcha odo, ihe isi ike n'ịgwakọta, mmiri ozuzo, ịkwaga ebe ọzọ, na ọnụ ahịa dị elu nke metụtara itinye fotoiniti ọdịnala.

Enwere ike ịkwadebe oligomers ndị na-amalite onwe ha site na mmeghachi omume dị n'etiti ọtụtụ esters acrylate na ọtụtụ ndị na-enye onyinye Michael, na-emepụta usoro ngwaahịa.

Ụdị acrylate gụnyere: acrylate, epoxy acrylate, polyurethane acrylate, polyester acrylate, silicone acrylate, melamine acrylate, perfluoroacrylate, fumarate, na maleate. Ndị na-enye onyinye Michael gụnyere: β-ketoesters, β-diketones, β-ketoamides, β-ketoanilides, na ndị ọzọ. Otu R' dị na onye nyere onyinye Michael nwere ike ịbụ otu ọrụ ma ọ bụ otu ọgwụgwọ abụọ.

A na-akwadebe ụdị nke abụọ nke oligomer nke na-amalite onwe ya site na iji fotoinitiators nwere hydroxyl (dịka benzoin, 1173, 184, 2959) na oligomers nwere otu isocyanate, si otú a na-etinye fotoinitiator na oligomer iji mepụta macromolecular photoinitiator nwere otu mmalite arụnyere n'ime.

Uru nke oligomers nke fotoinitiator a gwakọtara agwakọta:

1. Ọnụego foto na-eme ka ihe dị nro dị nso na nke oligomers nkịtị yana obere molekul photoinitiators.
2. Ndakọrịta dị mma na sistemụ ahụ.
3. Nke a na-ebelata ikike mbugharị nke onye na-emepụta foto.
4. Na-ebelata mmepụta nke ngwaahịa mmebi foto na-emerụ ahụ site na ihe na-emepụta fotoinitiator (dịka benzaldehyde).
5. Ihe na-akpali foto ahụ anaghị egbu egbu ma ọ dịghị emerụ ahụ, nke na-eme ka ọ dị mma maka iji ya na mkpuchi na ink maka nkwakọ nri.

Data na-egosi na ngwaahịa mmeghachi omume nke ndị na-emepụta foto na-ebelata oke mbugharị na ikike ịmịpụta nke iberibe ndị na-emepụta ihe, a na-ebelatakwa oke benzaldehyde e mepụtara na fim ahụ a gwọrọ. Ya mere, itinye foto na-emepụta ihe na oligomers na-emepụta otu macromolecular photoinitiators nke na-adịghị egbu egbu ma na-emerụ ahụ. Enwere ike iji ha mee ihe mkpuchi na ink maka nkwakọ ngwaahịa nri na ọgwụ. Na 2006, US Food and Drug Administration (FDA) kwupụtara na enwere ike iji mkpuchi UV na ink emepụtara site na iji macromolecular photoinitiators na mbipụta nkwakọ ngwaahịa nri na ọgwụ, na-agbanwe usoro gara aga ebe enweghị ike iji ink na mkpuchi UV maka nkwakọ ngwaahịa nri na ọgwụ, ma na-emepe oghere ọhụrụ maka ngwa ink na mkpuchi UV.

3.Ndị Oligomers dị obere

Ná ngwụcha narị afọ nke 20, teknụzụ ọhụrụ maka ihe ndị a na-agwọ foto — mbipụta inkjet UV — pụtara. Mbipụta inkjet bụ usoro mbipụta na-anaghị emetụ aka nke na-anaghị achọ efere mbipụta. Ọ na-akpụ onyonyo site na ịpịpụ ntụpọ ink n'elu ihe e ji etinye ihe. Site na idezi eserese na ederede site na kọmputa na ijikwa isi mbipụta iji wepụta ntụpọ ink n'ụzọ ziri ezi, ọ bụ usoro onyonyo dijitalụ zuru oke. Ugbu a ọ bụ otu n'ime ụzọ onyonyo dijitalụ na-emepe ngwa ngwa, na-enye uru nke mbipụta mgbe achọrọ ya, ọsọ dị elu, ịdị mma dị elu, na agba na-egbuke egbuke.

Isi ihe a na-eri maka mbipụta inkjet UV bụ ink inkjet UV, nke chọrọ ka ink ahụ nwee obere viscosity, ọsọ ọgwụgwọ dị elu, ezigbo agba kwụsiri ike, na enweghị sedimentation.