Kedu ihe dị iche n'etitiTPUna PU?
TPU (polyurethane elastomer)
TPU (Thermoplastic Polyurethane Elastomer)bụ ụdị plastik na-apụta apụta. N'ihi ezigbo nhazi ya, iguzogide ihu igwe, na ịdị mma gburugburu ebe obibi, a na-ejikarị TPU eme ihe n'ụlọ ọrụ ndị metụtara ya dịka ihe eji akpụ akpụkpọ ụkwụ, paịpụ, ihe nkiri, ihe eji agagharị, eriri, na waya.
Polyurethane thermoplastic elastomer, nke a makwaara dị ka thermoplastic polyurethane roba, nke a na-akpọ TPU, bụ ụdị (AB) n-block linear polymer. A bụ polyester ma ọ bụ polyether dị arọ (1000-6000), B bụkwa diol nwere atọm carbon agbụ ígwè 2-12. Nhazi kemịkalụ dị n'etiti akụkụ AB bụ diisocyanate, nke MDI na-ejikọkarị.
Roba polyurethane nke Thermoplastic na-adabere na njikọ hydrogen dị n'etiti molekul ma ọ bụ njikọ dị nro n'etiti agbụ macromolecular, a na-agbanwekwa usoro njikọ abụọ a na-agbanwe agbanwe ma okpomọkụ na-abawanye ma ọ bụ na-ebelata. N'ọnọdụ agbazere agbaze ma ọ bụ ngwọta, ike intermolecular na-ebelata, mgbe oyi ma ọ bụ mmiri ozuzo gasịrị, ike intermolecular siri ike na-ejikọ ọnụ, na-eweghachi njirimara nke ihe siri ike mbụ.
Elastomers thermoplastic nke polyurethaneEnwere ike kewaa ya n'ụdị abụọ: polyester na polyether, yana obere ihe ọcha na-adịghị agbanwe agbanwe ma ọ bụ kọlụm na njupụta dị n'etiti 1.10-1.25. Ụdị polyether ahụ nwere njupụta dị ala karịa ụdị polyester. Okpomọkụ mgbanwe iko nke ụdị polyether bụ 100.6-106.1 ℃, nke ụdị polyester bụkwa 108.9-122.8 ℃. Okpomọkụ na-agbawa agbawa nke ụdị polyester na ụdị polyester dị ala karịa -62 ℃, ebe obere nguzogide okpomọkụ nke ụdị ether siri ike ka mma karịa nke ụdị polyester.
Ihe pụrụ iche nke polyurethane thermoplastic elastomers bụ ezigbo iguzogide iyi, ezigbo iguzogide ozone, ike dị elu, ike dị elu, ezigbo mgbanwe, obere iguzogide okpomọkụ, ezigbo iguzogide mmanụ, kemịkalụ, na iguzogide gburugburu ebe obibi. N'ebe mmiri dị mmiri, nkwụsi ike hydrolysis nke polyether esters karịrị nke ụdị polyester.
Elastomers nke Polyurethane thermoplastic anaghị egbu egbu ma ọ bụ enweghị isi, a na-agbaze ha na ihe mgbaze dịka methyl ether, cyclohexanone, tetrahydrofuran, dioxane, na dimethylformamide, tinyekwara na ihe mgbaze agwakọtara nke nwere toluene, ethyl acetate, butanone, na acetone n'ogo kwesịrị ekwesị. Ha na-egosipụta ọnọdụ enweghị agba na ìhè ma nwee ezigbo nkwụsi ike nchekwa.
Oge ozi: Eprel-22-2024