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Chigadzirwa Zita:polyurethane

Chigadzirwa Molecular chimiro:

Makemikari Zvivakwa:

Polyurethanes yakatanga kugadzirwa uye kuongororwa naDr Urethanes anobva eres of carbamic acids aripo chete muchimiro chevakuru [15]. Iyo mikuru mukana weTu ndeyekuti iyo keteni haina kuumbwa chete yekabhoni maatomu asi pane heteroatoms, oksijeni, kabhoni uye nitrogen [4]. Zvekushandisa maindasitiri, polyhydroxyl comppound inogona kushandiswa. Saizvozvo, poly-inoshanda nitrogen makomputa inogona kushandiswa pane zvinongedzo zvekunakidzwa. Nekuchinja uye kusiyanisa polyhydroxyl uye polyfunctional nitrogen makomputa, yakasiyana pus inogona kuve yakashongedzwa [15]. Polyester kana polyether resins ine hydroxyl mapoka anoshandiswa kugadzira polystor polyether-pu, zvichiteerana [6]. Kusiyana muhuwandu hwekudzorera uye kupatsanurwa pakati nepakati pemachira ebazi kuburitsa pus kubva mumutsara kusvika pamatanga uye 9Exible kune yakaomarara. Linear Pus inoshandiswa kuti ugadzire kwemachira uye kuumbwa [6]. Pus inochinjika inoshandiswa mukugadzirwa kwekusungira vamiririri uye jasi [5]. Inoshanduka uye yakaomesesa yakarukwa mapurasitiki, ayo anogadzira ruzhinji rwe pus yakagadzirwa, inogona kuwanikwa mumhando dzakasiyana-siyana muindasitiri [7]. Uchishandisa Low Molecular Huru Prepolymers, Various Block Copolymers inogona kugadzirwa. Iyo terminal hydroxyl boka rinobvumira kushanduka kwemabhuru, inonzi zvikamu, kuiswa muPu keteni. Kusiyana mune izvi zvikamu kunoguma mumadhigirii akasiyana emhando yepamusoro uye elasticity. Block inopa iyo yakaoma crystalline chikamu uye ine teni yeteni yakawedzerwa inotaurwa nezvikamu zvakaoma. Avo vanobvuma ambure ambery rabhay chikamu uye vane polyester / polyether vanonzi zvinonzi zvinyoro-nyoro zvikamu. Kurume

Chikumbiro:

Polyurethanes ndeimwe yezvinhu zvakanyanyisa zvinhu zviri munyika nhasi. VAKAWANDA VAKAWANDA VANOTAURA KUTI VANOTI VANOTENDA MUFANANIDZO MUZVINHU ZVINOGONESESA PANORA UYE ZVINHU ZVAKAWANDA, NEMAHARA, NEMAHARA uye Elastomers uye Elastes. Polyurethanes akawedzera kushandiswa mukati memakore makumi matatu apfuura mune dzakasiyana siyana dzekushandisa nekuda kwekunyaradza kwavo, mutengo unobhadharwa, simba rekuchengetedza uye kugona kugona uye kugona kwenyama. Ndezvipi zvimwe zvezvinhu zvinoita polyurethanes zvinodikanwa? Polyurethane Durability inobatsira zvakanyanya kune iyo yakareba hupenyu hwezvigadzirwa zvakawanda. Kuwedzerwa kwechigadzirwa chechigadzirwa chehupenyu hwekutenderera uye zvekuchengetedza zviripo zvakakosha kufunga kwezvakatipoteredza zvinowanzofarira kusarudzwa kwePolyurethanes [19-21]. Polyurethanes (Pus) anomiririra kirasi yakakosha yeTermaspastics uye orgmoset polymers seyavo, inopisa, uye makemikari zvivakwa zvinogona kugadziriswa nekuita kwakasiyana-siyana polysols uye poly