Kedu ihe dị iche n'etitiTPUna PU?
TPU (polyurethane elastomer)
Thermoplastic Polyurethane Elastomer (TPU)bụ ụdị plastik na-apụta.N'ihi nhazi ya dị mma, nguzogide ihu igwe, na enyi gburugburu ebe obibi, TPU na-ejikarị eme ihe na ụlọ ọrụ ndị yiri ya dị ka ihe akpụkpọ ụkwụ, ọkpọkọ, ihe nkiri, rollers, cables, na wires.
Polyurethane thermoplastic elastomer, nke a makwaara dị ka thermoplastic polyurethane roba, nke akpọrọ TPU, bụ ụdị (AB) n-block linear polymer.A bụ ihe dị arọ molekụla dị elu (1000-6000) polyester ma ọ bụ polyether, na B bụ diol nwere atom carbon carbon 2-12 kwụ ọtọ.Usoro kemịkalụ dị n'etiti ngalaba AB bụ diisocyanate, nke MDI na-ejikọkarị ya.
Thermoplastic polyurethane rọba na-adabere na intermolecular hydrogen bonding ma ọ bụ nwayọọ cross-njikọ n'etiti macromolecular agbụ ígwè, na abụọ a cross-njikọ ihe na-atụgharị na-abawanye ma ọ bụ na-ebelata okpomọkụ.N'ebe a wụrụ awụ ma ọ bụ ihe ngwọta, ike intermolecular na-ebelata, na mgbe ọ jụrụ oyi ma ọ bụ ihe mgbaze, ike intermolecular siri ike na-ejikọta ọnụ, na-eweghachi ihe onwunwe nke ihe siri ike mbụ.
Polyurethane thermoplastic elastomersEnwere ike kewaa ya n'ime ụdị abụọ: polyester na polyether, na-acha ọcha na-acha ọcha na-adịghị agbanwe agbanwe ma ọ bụ akụkụ kọlụm na njupụta nke 1.10-1.25.Ụdị polyether nwere njupụta dị ala karịa ụdị polyester.The iko mgbanwe okpomọkụ nke polyether ụdị bụ 100.6-106.1 ℃, na nke polyester ụdị bụ 108.9-122.8 ℃.The brittleness okpomọkụ nke polyether ụdị na polyester ụdị dị ala karịa -62 ℃, mgbe obere okpomọkụ iguzogide nke ike ether ụdị dị mma karịa nke polyester ụdị.
Njirimara pụtara ìhè nke polyurethane thermoplastic elastomers bụ ezigbo nguzogide eyi, nguzogide ozone, ike siri ike, ike dị elu, ngbanwe dị mma, nkwụsi ike dị ala, ezigbo nguzogide mmanụ, nguzogide kemịkalụ, na nguzogide gburugburu ebe obibi.Na gburugburu iru mmiri, nkwụsi ike hydrolysis nke polyether esters karịrị nnọọ nke ụdị polyester.
Polyurethane thermoplastic elastomers bụ ndị na-adịghị egbu egbu na isi ísì, soluble na ihe mgbaze dị ka methyl ether, cyclohexanone, tetrahydrofuran, dioxane, na dimethylformamide, nakwa dị ka ihe mgbaze agwakọta nke mejupụtara toluene, ethyl acetate, butanone, na acetone n'ụzọ kwesịrị ekwesị.Ha na-egosipụta ọnọdụ enweghị agba na nke doro anya ma nwee nkwụsi ike nchekwa dị mma.
Oge nzipu: Eprel-22-2024