Ni irihe tandukaniro riri hagati ya TPU na PU?

Ni irihe tandukaniro riri hagatiTPUna PU?

TPU (polyurethane elastomer)

TPU (Thermoplastique Polyurethane Elastomer)ni ubwoko bwa plastike bugaragara. Bitewe nuko itunganijwe neza, irwanya ikirere, hamwe n’ibidukikije byangiza ibidukikije, TPU ikoreshwa cyane mu nganda zijyanye n’ibikoresho nkinkweto, imiyoboro, firime, umuzingo, insinga, ninsinga.

Polyurethane thermoplastique ya elastomer, izwi kandi nka rebero ya termoplastique polyurethane, mu magambo ahinnye yitwa TPU, ni ubwoko bwa (AB) n-guhagarika umurongo wa polymer. A ni uburemere buke bwa molekile (1000-6000) polyester cyangwa polyether, na B ni diol irimo atome ya karubone 2-12 igororotse. Imiterere yimiti hagati yibice bya AB ni diisocyanate, ubusanzwe ihujwe na MDI.

Rubber ya Thermoplastique polyurethane yishingikiriza kuri hydrogène ya hydrogène intermolecular cyangwa guhuza byoroheje guhuza iminyururu ya macromolekula, kandi izi nyubako zombi zihuza zishobora guhinduka hamwe no kwiyongera cyangwa kugabanuka kwubushyuhe. Mugihe cyashongeshejwe cyangwa igisubizo, imbaraga za intermolecular ziracika intege, hanyuma nyuma yo gukonjesha cyangwa guhumeka, imbaraga zikomeye za intermolecular zihuza hamwe, zigasubiza ibintu byumwimerere.

Polyurethane thermoplastique elastomersBirashobora gushyirwa mubwoko bubiri: polyester na polyether, hamwe na cyera idasanzwe idasanzwe cyangwa inkingi hamwe nubucucike bwa 1.10-1.25. Ubwoko bwa polyether bufite ubucucike buri munsi yubwoko bwa polyester. Ubushyuhe bwikirahure bwubwoko bwa polyether ni 100.6-106.1 ℃, naho ubwoko bwa polyester ni 108.9-122.8 ℃. Ubushyuhe bukabije bwubwoko bwa polyether nubwoko bwa polyester buri munsi ya -62 ℃, mugihe ubushyuhe buke bwubwoko bwa ether bukomeye buruta ubw'ubwoko bwa polyester.

Ibintu byingenzi biranga polyurethane thermoplastique elastomers ni ukurwanya kwambara neza, kurwanya ozone nziza, gukomera kwinshi, imbaraga nyinshi, elastique nziza, kurwanya ubushyuhe buke, kurwanya amavuta meza, kurwanya imiti, no kurwanya ibidukikije. Mubidukikije bitose, hydrolysis itekanye ya polyether est est irenze kure iyubwoko bwa polyester.

Polyurethane thermoplastique elastomers ntabwo ari uburozi kandi nta mpumuro nziza, irashobora gushonga mumashanyarazi nka methyl ether, cyclohexanone, tetrahydrofuran, dioxane, na dimethylformamide, ndetse no mumashanyarazi avanze igizwe na toluene, Ethyl acetate, butanone, na acetone mukigereranyo gikwiye. Berekana ibara ritagira ibara kandi rifite umucyo kandi rifite ububiko bwiza.