Iterambere Rishya Mubikoresho bya Polyurethane byo Gusana Ultra-Byihuse

Iterambere ryibikoresho bya polymer bifite ubushobozi bwo kwikiza, kugirango ibikoresho byangiritse bishobore kwikiza no kuvuka neza, ni bumwe muburyo bwo kugabanya "umwanda wera". Nubwo bimeze bityo ariko, biragoye kumenya ubushyuhe bwicyumba cyo kwisana ubwacyo cya polymers yikirahure kubera ubwinshi bwimikorere ya molekile hamwe numuyoboro wahagaritswe wurunigi rwimikorere. Nubwo hari intambwe imaze guterwa mubirahuri byo kwikiza bya polymer mu myaka yashize, ibikoresho bya mashini nkeya, uburyo bwo gusana bigoye hamwe nigihe kinini cyo gusana bituma bigorana gukoreshwa. Kubwibyo, iterambere ryibikoresho byinshi bya polymer bifite ubushobozi bwo gusana byihuse mubirahuri nta gushidikanya ni ikibazo gikomeye.

Vuba aha, itsinda rya Prof. Jinrong Wu muri College ryatangaje ko polyurethane (UGPU) ifite ikirahure cyinshi gishobora gusanwa vuba ku bushyuhe bwicyumba. Muri iki gikorwa, abashakashatsi babonye ibikoresho bya polyurethane hamwe n’iminyururu ya acyclic heteroatomic hamwe n’imiterere ya hyperbranched reaction bakoresheje uburyo bwa monomer bufatanije. Iyi miterere idasanzwe ya molekulari ihuza imbaraga za molekuline nini ya polymers ya hyperbranched hamwe na hydrogène nyinshi ya hydrogène ya polyurethanes kugirango ibe umuyoboro mwinshi wa hydrogène uhuza imiyoboro ishingiye kuri urea, imiyoboro ya urethane, hamwe nitsinda rya hydroxyl ryamashami.UGPU ifite imbaraga zingana kugeza kuri 70 MPa, modulus yo kubika ya 2.5 GPa, hamwe nubushyuhe bwikirahure burenze cyane ubushyuhe bwicyumba (53 ℃), bigatuma UGPU ikora plastike yikirahure ikabije.

UGPU ifite ubushobozi buhebuje bwo kwikiza, kandi irashobora kubona ikirahure cyo kwikiza munsi yigitutu. Muri icyo gihe, abashakashatsi basanze amazi make cyane akoreshwa mu gice cya UGPU yihutishije cyane igipimo cyo gusana. Nibihe byose byanditse kubikoresho byo kwikiza. Byongeye kandi, icyitegererezo cyasanwe kirashobora kunanira ikizamini cya MPa 10, kikaba gihagije kugirango cyuzuze ibisabwa kugirango gisanwe vuba kandi gikomeze serivisi nyuma yo kwangiza ibice byubatswe.