Pịstik Polyurethane (PU)
* Polyurethane (PU) bụ mkpọpụta nke polyurethane, polyisocyanate na polyhydroxy polymer polymerization, ọ dị na isi usoro nke polymers nwere ọtụtụ akụkụ urethane repetitive (-NHCOO-) nke polymer compounds.
* Ngwaahịa plastik PU ahaziri ahazi
Polyurethane, nke a makwaara dị ka polyurethane na polyurethane, bụ otu n'ime macromolecules nwere ihe njirimara urethane n'ime isi yinye. Ụdị ihe polymer a nwere ma ike na arụmọrụ nhazi dị mma nke plastik, ma nwee uru dị ukwuu n'ọrụ n'ime mpaghara asaa kachasị mkpa nke plastik, roba, ụfụfụ, eriri, mkpuchi, ihe nrapado na polymers arụmọrụ. N'ọrụ mmepụta ihe, a na-ejikarị ya eme ihe n'ọtụtụ ebe na taya dị ala, gaskets, ute ụgbọala na ubi ndị ọzọ. Na ndụ kwa ụbọchị, a na-eji polyurethane eme ụdị ụfụfụ na ogbo plastik dị iche iche.
Kedu ihe ị nwere ike iji PU Plastic mee?
Elastomer polyurethane bụ otu ihe eji arụ ọrụ nwere ihe ndị dị ka rọba na plastik, ha nwere ike ịdọkpụ dị mma, ike ndọda, ike mmetụta, iguzogide abrasion, iguzogide ihu igwe, iguzogide hydrolysis, iguzogide mmanụ na uru ndị ọzọ.
A na-ejikarị ya eme ihe dịka ihe owuwu (dịka paịpụ, gaskets, belt, rollers, gia, paịpụ, wdg), ihe mkpuchi, sleụl akpụkpọ ụkwụ na taya siri ike. Dịka ọmụmaatụ, dịka efere sieve nke a na-egwupụta ihe, ọ nwere obere mkpọtụ, ikike dị elu na iguzogide iyi karịa efere sieve ọla ọdịnala. Na mgbakwunye, polyurethane nwere ezigbo biocompatibility, dịka ihe biomedical, enwere ike iji ya na pacemakers, arịa ọbara artificial, ọkpụkpụ artificial, wdg.
Ngwa ndị a gụnyere maka Polyurethane (PU)
- Ụgbọ njem
- Owuwu ụlọ
- Igwe
- Ngwa eletrọniki
- Ngwongwo ụlọ
- Nhazi Nri
- Ákwà na uwe
- Akpụkpọ anụ sịntetik
- Mbipụta
- Ụlọ ọrụ Petrochemical
- Egwuregwu
- Nlekọta ahụike
Njirimara Polyurethane (PU)
* A na-ekewa ụfụfụ polyurethane n'ụdị abụọ: ụfụfụ siri ike na ụfụfụ na-agbanwe agbanwe, nwere ezigbo ike ịgbatị, ịgbatị, ike mkpakọ na mgbanwe, yana ezigbo nkwụsi ike kemịkalụ. Na mgbakwunye, ụfụfụ polyurethane nwere ike nhazi dị mma, njikọta, mkpuchi na ihe ndị ọzọ, nke bụ arụmọrụ dị mma nke ihe na-eme ka ihe dị nro.
Elastomer polyurethane n'ihi nhazi ya nwere akụkụ yinye abụọ dị nro, siri ike, yabụ enwere ike imepụta yinye molekul iji nye ihe ahụ ike dị elu, ike dị mma, ike na-adịghị emebi emebi, ike na-anaghị emebi emebi na ihe ndị ọzọ dị mma, nke a maara dị ka polyurethane "roba na-anaghị emebi emebi" n'otu oge ahụ yana oke ike nke roba na ike nke plastik ahụ.
* Ihe ndị e ji polyurethane mee nwere ike ịkpakọba ihe nke ọma, nke na-eme ka ha nwee ike ijikọ nke ọma na ọtụtụ ihe ndị e ji mee ihe ma nwee ike iji ha mee ihe dị ka ihe nrapado n'ọhịa njikọ.
* A na-ejikarị ihe mmado polyurethane eme ihe n'ọrụ nkwakọ ngwaahịa, owuwu ụlọ, osisi, ụgbọ ala, na ụlọ ọrụ akpụkpọ ụkwụ.
Kedu ka esi eme ihe Polyurethane (PU)?
N'ihi oke mmiri polyurethane siri ike, a ga-eji usoro mmepụta ọhụrụ kwadebe emulsion PU, usoro mmepụta nke polyurethane mmiri na-abụkarị dịka ndị a: ① site na oligomer polyol, onye na-agbatị chain, diisocyanate iji mepụta oke molekul dị elu nke PU pre-polymer; ② emechiri emechi mgbe emechara polymer pre-polymer n'ime mmiri iji mepụta mgbasa.
Usoro nkwadebe nke polyurethane emulsion nwere ụdị abụọ bụ isi: usoro emulsification mpụga na usoro emulsification dị n'ime.
1. Usoro emulsification mpụga bụ usoro emulsification a manyere n'ihu emulsifier, akwa mkpuchi dị elu.
2. A na-eme usoro emulsification onwe onye site n'itinye otu hydrophilic n'ime ọkpụkpụ molekul nke polyurethane.
A na-etinye otu Hydrophilic n'ime ọkpụkpụ PU site na mgbasawanye nke monomers hydrophilic, nke mejupụtara otu ndị na-emepụta nnu na ihe ndị na-emepụta nnu.
Imegharị plastik Polyurethane (PU)
- Mweghachi plastik Polyurethane (PU) Enwere ike kewaa ya n'ime imegharị ihe na kemịkalụ.Imegharị ihe n'ime ihe na-eme ka ihe dị mma ma dịkwa ọnụ ala maka imegharị ihe ndị e ji polyurethane mee na ihe ndị e ji mee ya. A na-ebu ụzọ belata nha ihe e ji mee ihe n'ụdị polyurethane foam ka ọ bụrụ ọkọlọtọ nke enwere ike ịhazigharị n'oge usoro nke abụọ. A na-emebi ihe mkpofu e ji mee ihe ndị e ji eme ihe, ma ọ bụ ihe e ji emecha ihe site na usoro mmepụta, ka ọ bụrụ ihe bara uru karịa dịka flakes, granules ma ọ bụ powders.Imegharị ihe kemịkalụ bụ ụzọ e si agbaji ụfụfụ polyurethane ka ọ bụrụ ihe ndị e ji polyurethane emepụta ma ọ bụ ihe ndị ọzọ e ji kemịkalụ mee site na iji alcoholysis, amineyssis, hydrolysis ma ọ bụ pyrolysis. Ụfụfụ polyurethane nwere njikọ urethane na urea. N'ime usoro alcoholysis, aminolysis na alkali hydrolysis, njikọ urethane na urea dị na molekul polyurethane na-agbaji ma gbazee ka ọ bụrụ polyols, aromatic polyamines, carbon dioxide na ndị ọzọ.
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