Itandukaniro riri hagati yubwoko bwa TPU nubwoko bwa polyester

Itandukaniro hagatiUbwoko bwa TPUnaubwoko bwa polyester

TPU irashobora kugabanywamo ubwoko bubiri: ubwoko bwa polyether nubwoko bwa polyester. Ukurikije ibisabwa bitandukanye byibicuruzwa, ubwoko butandukanye bwa TPU bugomba guhitamo. Kurugero, niba ibisabwa birwanya hydrolysis birwanya cyane, ubwoko bwa TPU burakwiriye kuruta ubwoko bwa polyester TPU.

Uyu munsi rero, reka tuvuge itandukaniro riri hagatiUbwoko bwa TPUnaubwoko bwa polyester TPU, nuburyo bwo kubitandukanya gute? Ibikurikira bizasobanura ibintu bine: itandukaniro ryibikoresho fatizo, itandukaniro ryimiterere, kugereranya imikorere, nuburyo bwo kumenya.

1 Itandukaniro mubikoresho fatizo

Nizera ko abantu benshi bazi igitekerezo cya elastomers ya thermoplastique, ifite imiterere yuburyo ikubiyemo ibice byoroshye kandi bikomeye, kugirango bizane ibintu byoroshye kandi bikomeye.

TPU ifite kandi ibice byombi byoroshye kandi bikomeye, kandi itandukaniro riri hagati yubwoko bwa TPU nubwoko bwa polyester TPU iri mubitandukaniro mubice byoroshye. Turashobora kubona itandukaniro ryibikoresho fatizo.

Ubwoko bwa TPU: 4-4 '- diphenylmethane diisocyanate (MDI), polytetrahydrofuran (PTMEG), 1,4-butanediol (BDO), hamwe na dosiye igera kuri 40% kuri MDI, 40% kuri PTMEG, na 20% kuri BDO.

Ubwoko bwa polyester TPU: 4-4 '- diphenylmethane diisocyanate (MDI), 1,4-butanediol (BDO), aside adipic (AA), MDI igera kuri 40%, AA ihwanye na 35%, na BDO bangana na 35% 25%.

Turashobora kubona ko ibikoresho bibisi byubwoko bwa TPU byoroshye urunigi igice ni polytetrahydrofuran (PTMEG); Ibikoresho fatizo byubwoko bwa polyester byoroshye bya TPU ni acide ya adipic (AA), aho aside adipic ifata hamwe na butanediol kugirango ikore polybutylene adipate ester nkigice cyumunyururu woroshye.

2 differences Itandukaniro ryimiterere

Urunigi rwa molekuline ya TPU rufite (AB) n-ubwoko bwumurongo uhuza umurongo, aho A nuburemere bwa molekile ndende (1000-6000) polyester cyangwa polyether, B muri rusange ni butanediol, naho imiterere yimiti iri mubice bya AB ni diisocyanate.

Ukurikije imiterere itandukanye ya A, TPU irashobora kugabanywa mubwoko bwa polyester, ubwoko bwa polyether, ubwoko bwa polycaprolactone, ubwoko bwa polyakarubone, nibindi. Ubwoko busanzwe ni ubwoko bwa TPU nubwoko bwa TPU.

Duhereye ku gishushanyo cyavuzwe haruguru, turashobora kubona ko urunigi rusange rwa molekuline yubwoko bwa TPU hamwe na polyester yo mu bwoko bwa TPU byombi byubatswe kumurongo, itandukaniro nyamukuru ni ukumenya niba igice cyurunigi rworoshye ari polyol polyole cyangwa polyester polyol.

3 compar Kugereranya imikorere

Polyether polyol ni inzoga polymers cyangwa oligomers hamwe na ether bond hamwe na hydroxyl mumatsinda ya nyuma kumurongo wa molekile nyamukuru. Bitewe nimbaraga nke zifatanije za ether zihuza muburyo bwazo no koroshya kuzunguruka.

Kubwibyo, polyether TPU ifite ubushyuhe buhebuje bwubushyuhe bwo hasi, irwanya hydrolysis, irwanya ifu, irwanya UV, nibindi.

Amatsinda ya ester afite imbaraga zikomeye zo guhuza imbaraga muri polyester polyole irashobora gukora hydrogène ihuza ibice byurunigi rukomeye, ikora nkibintu byoroshye guhuza. Nyamara, polyester ikunda kumeneka bitewe nigitero cya molekile zamazi, kandi aside iterwa na hydrolysis irashobora kurushaho guhagarika hydrolysis ya polyester.

Kubwibyo, polyester TPU ifite imiterere yubukanishi nziza, irwanya kwambara, irwanya amarira, irwanya ruswa, irwanya ubushyuhe bwinshi, hamwe no kuyitunganya byoroshye, ariko irwanya hydrolysis.

4 method Uburyo bwo kumenyekanisha

Kubijyanye na TPU nibyiza gukoresha, hashobora kuvugwa gusa ko guhitamo bigomba gushingira kubisabwa mubicuruzwa. Kugirango ugere kubintu byiza bya mashini, koresha polyester TPU; Niba urebye ikiguzi, ubucucike, hamwe nibidukikije bikoreshwa, nko gukora ibicuruzwa byo kwinezeza byamazi, polyether TPU irakwiriye.

Ariko, mugihe uhisemo, cyangwa kubwimpanuka kuvanga ubwoko bubiri bwa TPU, ntabwo bifite itandukaniro rigaragara mumiterere. Nigute dushobora kubatandukanya?

Hariho muburyo bwinshi, nkibara rya chimique, gazi chromatografiya-mass spectrometrie (GCMS), mid infragre spekitroscopi, nibindi, ariko, ubwo buryo busaba ubuhanga buhanitse kandi bufata igihe kirekire.

Hariho uburyo bworoshye kandi bwihuse bwo kumenya? Igisubizo ni yego, kurugero, uburyo bwo kugereranya ubucucike.

Ubu buryo busaba gusa ikizamini kimwe. Dufashe urugero rwinshi rwa reberi yubucucike bwa metero nkurugero, intambwe zo gupima ni:

Shira ibicuruzwa mumeza yo gupima, werekane uburemere bwibicuruzwa, hanyuma ukande Enter urufunguzo rwo kwibuka.
Shira ibicuruzwa mumazi kugirango werekane agaciro k'ubucucike.
Ibikorwa byose byo gupima bifata amasegonda 5, hanyuma birashobora gutandukanywa hashingiwe ku ihame ryuko ubwinshi bwubwoko bwa polyester TPU burenze ubw'ubwoko bwa TPU. Ubucucike bwihariye ni: ubwoko bwinshi TPU -1.13-1.18 g / cm3; Polyester TPU -1.18-1.22 g / cm3. Ubu buryo bushobora gutandukanya byihuse ubwoko bwa TPU polyester nubwoko bwa polyether.