Kugira ngo tugabanye ikiguzi cy'ibicuruzwa kandi tubone umusaruro w'inyongera,polyurethane thermoplasticelastomer zishobora gukoreshwa nk'ibikoresho bikunze gukoreshwa mu gukonjesha ibikoresho bitandukanye bya thermoplastic na rubber byahinduwe.
Bitewe napolyurethaneKubera ko ari polymer ifite polar nyinshi, ishobora kuba ihuye na resins cyangwa rabha za polar, nko iyo ikoreshejwe hamwe na polyethylene chlorine (CPE) kugira ngo ikore ibikoresho by'ubuvuzi; Kuvanga na ABS bishobora gusimbura ikoreshwa rya pulasitiki ya thermoplastic y'ubuhanga; Iyo ikoreshejwe hamwe na polycarbonate (PC), ifite imiterere nk'ubudahangarwa n'amavuta, ubudahangarwa n'amavuta, no kudahangarwa n'ingaruka, kandi ishobora gukoreshwa mu gukora imiyoboro y'imodoka; Kuvanga na polyester bishobora kunoza imikorere yayo ikomeye; Byongeye kandi, ishobora kuba ihuye neza na polyvinyl chloride, polyoxymethylene (POM), cyangwa polyvinylidene chloride; Polyester polyurethane ishobora kuba ihuye neza na 15% ya nitrile rubber cyangwa 40% ya nitrile rubber/polyvinyl chloride blend rubber; Polyether polyurethane ishobora kandi kuba ihuye neza na 40% ya nitrile rubber/polyvinyl chloride blend adhesive; Ishobora kandi kuba ihuye na copolymers za acrylonitrile styrene (SAN); Ishobora gukora imiterere y'urusobe rw'itumanaho (IPN) hamwe na polysiloxanes zikora. Inyinshi mu mavange yavuzwe haruguru yamaze gukorwa ku mugaragaro.
Mu myaka ya vuba aha, habayeho ubushakashatsi bwinshi ku gukaza POM naTPUMu Bushinwa. Kuvanga TPU na POM ntibyongera gusa ubushobozi bwo guhangana n'ubushyuhe bwinshi n'imiterere ya mekanike ya TPU, ahubwo binakomeza cyane POM. Abashakashatsi bamwe bagaragaje ko mu bizamini byo kwangirika kw'imitsi, ugereranije na POM matrix, POM alloys hamwe na TPU yongeweho ihinduka kuva kuri brittle fracture kugera kuri ductile fracture. Kongeramo TPU binaha POM ubushobozi bwo kwibuka imiterere. Agace ka crystalline ka POM gakora nk'igice gihoraho cya shape memory alloy, mu gihe agace ka amorphous ka TPU na POM kakora nk'igice gisubira inyuma. Iyo ubushyuhe bwo gusubiza ku bushyuhe ari 165 ℃ kandi igihe cyo kugarura kikaba 120 s, igipimo cyo kugarura ku bushyuhe kigera kuri 95%, kandi ingaruka zo kugarura ni nziza cyane.
TPU iragoye guhuza n'ibikoresho bya polymer bitari polar nka polyethylene, polypropylene, ethylene propylene rubber, butadiene rubber, isoprene rubber, cyangwa ifu ya rubber ya waste, kandi ntishobora gukora ibikoresho bivanze neza. Kubwibyo, uburyo bwo gutunganya ubuso nka plasma, corona discharge, wet chemistry, primer, flame, cyangwa reactive gaze akenshi bukoreshwa kuri ibi. Urugero, ibicuruzwa by'umwuka byo muri Amerika n'ibigo bya shimi bishobora kunoza cyane uburyo bwo kunama, imbaraga zo gukurura, no kudashira kw'ifu nziza ya polyethylene ifite uburemere bwa molekile bugera kuri miliyoni 3-5 nyuma yo gutunganya ubuso bwa gaze ya F2/O2, no kuyishyira muri polyurethane elastomers ku kigereranyo cya 10%. Byongeye kandi, gutunganya ubuso bwa gaze ya F2/O2 bishobora gukoreshwa ku migozi migufi miremire ifite uburebure bwa mm 6-35 twavuze haruguru, bishobora kunoza gukomera no gucika kw'ibikoresho bivanze.
Igihe cyo kohereza: Mutarama-19-2024