He aha te rerekētanga i waenganui iTe Whare Tiaki Tamarikime te PU?
TPU (polyurethane elastomer)
TPU (Elastomer Polyurethane Thermoplastic)he momo kirihou hou. Nā te pai o te tukatuka, te ātete ki te huarere, me te atawhai ki te taiao, e whakamahia whānuitia ana te TPU i roto i ngā ahumahi e pā ana ki te hanga hu, paipa, kiriata, roera, taura, me ngā waea.
Ko te elastomer thermoplastic polyurethane, e mōhiotia ana ko te rapa polyurethane thermoplastic, e whakarāpopototia ana ko te TPU, he momo polymer raina poraka-n (AB). Ko A he polyester, he polyether rānei he taumaha ngota teitei (1000-6000), ā, ko B he diol kei roto he 2-12 ngā ngota waro mekameka tika. Ko te hanganga matū i waenga i ngā wāhanga AB he diisocyanate, e honoa ana e te MDI.
Ka whakawhirinaki te rapa polyurethane thermoplastic ki te hononga hauwai i waenga i ngā ngota ngota, te hononga whakawhiti ngāwari rānei i waenga i ngā mekameka macromolecular, ā, ka taea te huri i ēnei hanganga hononga whakawhiti e rua me te pikinga, te hekenga rānei o te pāmahana. I te āhua rewa, i te āhua wairewa rānei, ka ngoikore ngā kaha i waenga i ngā ngota ...
Ngā elastomers thermoplastic polyurethaneKa taea te whakarōpū kia rua ngā momo: te polyester me te polyether, he ma ngā matūriki porowhita, pou rānei, ā, he matotoru te āhua, he 1.10-1.25 te matotoru. He iti ake te matotoru o te momo polyether i te momo polyester. Ko te pāmahana whakawhiti karāhe o te momo polyether he 100.6-106.1 ℃, ā, ko te momo polyester he 108.9-122.8 ℃. Ko te pāmahana pakarukaru o te momo polyether me te momo polyester he iti iho i te -62 ℃, ko te ātete pāmahana iti o te momo ether mārō he pai ake i te momo polyester.
Ko ngā āhuatanga tino pai o ngā elastomers thermoplastic polyurethane he ātete pai ki te kakahu, he ātete pai ki te ozone, he pakeke rawa, he kaha nui, he ngāwari pai, he ātete ki te pāmahana iti, he ātete pai ki te hinu, he ātete matū, me te ātete ki te taiao. I roto i ngā taiao makuku, he nui ake te pumau o te hydrolysis o ngā esters polyether i ērā o ngā momo polyester.
Kāore he paitini, kāore hoki he kakara o ngā elastomer thermoplastic polyurethane, ka wairewa i roto i ngā whakarewa pēnei i te methyl ether, cyclohexanone, tetrahydrofuran, dioxane, me te dimethylformamide, tae atu ki ngā whakarewa whakauru i hangaia mai i te toluene, ethyl acetate, butanone, me te acetone i ngā ōwehenga tika. He āhua mārama, kāore he tae, ā, he pai te pumau o te rokiroki.
Wā tuku: Paenga-whāwhā-22-2024