Mpaghara ngwa na atụmanya mmepe nke ihe na-agbanwe polyurethane

Polyurethane elastomers bụ nke na-egbochi polymers, ya bụ, polyurethane macromolecules bụ nke "akụkụ dị nro" na "akụkụ siri ike" na-etolite usoro nkewa micro-phase.A na-agbasasị akụkụ siri ike (nke sitere na isocyanates na ndị na-agbatị agbụ) na mpaghara mpaghara dị nro (nke sitere na oligomer polyols) ma na-arụ ọrụ nke isi crosslinking anụ ahụ.Ya mere, ma e jiri ya tụnyere roba ndị ọzọ sịntetik (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 polyurethane, nke a na-akpọ "ikpe" na mba ndị ọzọ, na-agụnye ngwaahịa polyurethane elastomer omenala, polyurethane plastic runway na ihe ndị ọzọ pavement, polyurethane waterproof coatings, adhesives, sealants, potting adhesives, etc., na-aza ihe dị ka 40% nke ngwaahịa. ngụkọta ego nke ngwaahịa polyurethane.Ọtụtụ n'ime ngwaahịa ndị a gwọrọ nke ihe ikpe (nke na-adabere na mmiri na ihe mgbaze na-ewepụ 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 aqueous, nke nwekwara ike na-ewere dị ka polyurethane elastomer ihe na sara mbara.N'echiche dị warara, polyurethane elastomer na-ezo aka na nkedo polyurethane elastomer (CPU), thermoplastic polyurethane elastomer (TPU) na ngwakọta polyurethane elastomer (MPU), na-aza 10% ma ọ bụ dịtụ ala nke mkpokọta polyurethane.CPU na TPU bụ ndị isi polyurethane elastomer, na ọdịiche ha dabere na ihe ndị dị ka usoro mmepụta na ihe ndọtị.Ụdị elastomer polyurethane omenala a, nke a makwaara dị ka "polyurethane roba", bụ nke ụdị roba synthetic pụrụ iche.Polyurethane elastomer na-arụ ọrụ dị elu bụ ihe nwere nguzogide kachasị mma n'etiti ihe niile polymer synthetic.A maara ya dị ka "eze nke iyi mgbochi".A na-eji ya eme ihe n'ọtụtụ ebe, ngwa ọhụrụ ka na-agbasawanye.

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

E jiri ya tụnyere ihe ígwè, polyurethane elastomer nwere uru nke ịdị arọ dị arọ, obere mkpọtụ, nkwụsị nkwụsị, ọnụ ahịa nhazi dị ala na nkwụsị nke acid 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 nke nguzogide iyi, ịcha nguzogide, nguzogide mmiri, ikike ibu dị elu, nguzogide ozone, nrụpụta dị mfe, ite na ịwụsa, na oke ike siri ike.

Polyurethane elastomer bụ ihe dị mkpa dị iche iche nke polyurethane.Ugbu a, oriri ya bụ ihe fọrọ nke nta ka ọ bụrụ 10% nke mkpokọta polyurethane.A na-eji polyurethane elastomer rụpụta ụdị wiil rọba ọ bụla, eriri ebu, mmiri na-eguzogide mmiri na mmiri na-eguzogide ọgwụ, eriri akara na mgbanaka, eriri eriri na ihe nkiri dị iche iche.A na-eji ngwaahịa ndị a eme ihe n'ọtụtụ ebe na ígwè na ígwè, mpempe akwụkwọ, Ngwuputa, igwe, mbipụta na ụlọ ọrụ ndị ọzọ.Polyurethane elastomer nwere ike gbanwee site na polymers ndị ọzọ, eriri, ntụ ntụ ntụ, wdg iji belata ọnụ ahịa ma melite arụmọrụ.