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Mpaghara ngwa na atụmanya mmepe nke ihe na-agbanwe polyurethane

Polyurethane elastomers bụ nke na-egbochi polymers, ya bụ, polyurethane macromolecules na-agụnye "akụkụ dị nro" na "akụkụ siri ike" ma na-etolite usoro nkewa nke micro-phase, nke a na-agbasasị akụkụ siri ike (site na isocyanates na ndị na-agbatị agbụ) na nro dị nro. mpaghara ngalaba (sitere na oligomer polyols) iji rụọ ọrụ nke isi njikọ njikọ anụ ahụ.Ya mere, e jiri ya tụnyere ndị ọzọ sịntetik rubbers (elastomers), polyurethane elastomers nwere ike ka mma ma na-eyi nguzogide, Elu elongation ka nwere ike ịnọgide na-enwe mgbe ike dị elu.

Ihe na-agbanwe agbanwe nke polyurethane, nke a na-akpọ "CASE" ná mba ọzọ, na-agụnyekarị ngwaahịa polyurethane elastomer omenala, ihe eji eme ihe dịka polyurethane plastic runways, polyurethane waterproof coatings, adhesives, sealants, potting adhesives, etc., na-aza ihe dị ka 40% nke ngụkọta ego. nke ngwaahịa polyurethane.Ọtụtụ n'ime ngwaahịa a gwọrọ nke ihe CASE (nke na-adabere na mmiri na ihe mgbaze mgbe ọ wepụsịrị mmiri na ihe mgbaze) bụ ihe na-emepụta polyurethane na-adịghị ụfụfụ.PU synthetic resin akpụkpọ anụ, ụfọdụ mkpuchi na adhesives bụ ihe mgbaze ma ọ bụ ngwaahịa sitere na mmiri, nke nwekwara ike weere dị ka ihe polyurethane elastomer n'ụzọ sara mbara.N'echiche dị warara, polyurethane elastomers na-ezo aka na castable polyurethane elastomers (CPU), thermoplastic polyurethane elastomer (TPU) na ngwakọta polyurethane elastomer (MPU), na-aza 10% ma ọ bụ ntakịrị ntakịrị nke mkpokọta polyurethane.CPU na TPU bụ ndị isi polyurethane elastomer, na ọdịiche ha na-adabere na mmepụta usoro na yinye extenders.Ụdị elastomer polyurethane omenala a, nke a makwaara dị ka "polyurethane roba", bụ nke ụdị pụrụ iche nke roba synthetic.Polyurethane elastomer na-arụ ọrụ dị elu bụ ihe kachasị mma na-eguzogide ihe n'etiti ihe niile polymer synthetic, nke a maara dị ka "eze nke na-eguzogide ọgwụ", a na-ejikwa ya n'ọtụtụ ebe, na ngwa ọhụrụ ka na-agbasawanye.

Enwere ike iji polyurethane elastomer dochie ọla, rọba na rọba nkịtị n'ubi ụfọdụ.

N'iji ya tụnyere ihe ígwè, polyurethane elastomer nwere uru nke ịdị arọ dị arọ, obere mkpọtụ, nkwụsị na-eyi, ọnụ ahịa nhazi dị ala na nguzogide corrosion acid.N'iji ya tụnyere plastik, ọ nwere uru nke ịdị elu siri ike na akwa mkpuchi mkpuchi.E jiri ya tụnyere rọba nkịtị, polyurethane elastomer nwere uru dị n'ichegide iyi, ịcha nkwụsi ike, nkwụchi anya mmiri, ikike ịdị elu dị elu, nkwụsị ozone, wdg, ma dị mfe ịmepụta, enwere ike ịkwanye, wụsa, ma nwee nnukwu ike.


Oge nzipu: Feb-14-2023