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Sunan samfurin:polyurehane

Tsarin kwayoyin halitta:

Kayan sunadarai:

Dr. Otto Bayer a farko Dr. Otto Bayer a 1937. Polyurthane ne mai polymer wanda ke maimaita karar. Urethanes sune abubuwan da ke tattare da Carbamic acid wanda ke wanzu ne kawai a cikin irensu [15]. Babban fa'idar PU shine cewa sarkar ba ta daɗaɗɗun abubuwa na carbon amma maimakon heteroatoms, oxygen, carbon da nitrogen [4]. Don aikace-aikacen masana'antu, ana iya amfani da ɗakin polyhydroxyl. Hakazalika, ana iya amfani da mahaɗan nitrogen a hanyar amide. Ta hanyar canzawa da kuma bambance-bambancen polyhydroxyl da mahaɗan nitrogen, ana iya samar da matsala daban-daban [15]. Polyester ko Polyether resins dauke da kungiyoyin hydroxyl ana amfani da su don samar da polyether-pu, bi da bi [6]. Bambancin cikin adadin saƙo da rarrabuwa tsakanin sarƙoƙi na reshe da ke haifar da tashin hankali daga layi zuwa gyaran. Ana amfani da linear an yi amfani da shi don kerar zaruruwa da ƙwararru [6]. Ana amfani da matsala mai sassauƙa a cikin samar da wakilan da ke ɗaure da gashi [5]. Rufin mawuyacin makami mai sauki, wanda ke yin yawancin ƙwayoyin kwari da aka samar, ana iya samunsu ta fuskoki daban-daban [7]. Yin amfani da ƙananan ƙwayar ƙwayar ƙwayar cuta na ƙwayar cuta, da yawa ana iya samar da launuka daban-daban. Kungiyar Hydroxyl Hydroxyl tana ba da damar canza tlocks, waɗanda ake kira sangare, za a saka cikin sarkar PU. Bambanci a cikin waɗannan sassan yana haifar da bambance-bambancen digiri na ƙarfi da kuma elebericity. Tubalan samar da tsauraran matakan crystalline da kuma dauke da sarkar sarkar ana kiransu da sarkar sernords [7]. Wadancan suna samar da wani ɗan jita-jita da ke dauke da polyester / polyether ana kiranta sassan sex. Kasuwanci, waɗannan toshe polymers an san su da sgmmed pus

Aikace-aikacen:

Polyurethanees suna ɗaya daga cikin kayan masarufi a cikin duniya a yau. Yawancinsu suna amfani da su daga sassa masu sassauƙa a cikin kayan ɗakunan ajiya, zuwa rigakafin kumfa a cikin kayan aikin ƙwallon ƙafa, zuwa sutturori da abubuwan da suka yi amfani da su a kan benaye da ƙamshi da kuma masu amfani da motoci [17,18]. Polyureshanees ya ƙara samun amfani a cikin shekaru talatin da suka gabata a aikace-aikace iri-iri saboda jin daɗinsu, fa'idodi, fa'idodi, savings mai tsada da yanayin kuzari. Wadanne abubuwa ne suke yin polyurethanes da kyawawa? Polyurehane dorsarfin yana ba da gudummawar mahimmanci ga mahimmancin rayuwar samfurori da yawa. Yadawa na sake zagayowar tsarin rayuwa da kayan aikin kayan aikin sune mahimman ayyukan muhalli wanda yafi dacewa da zabin polyuranes [19-21]. Polyurehanes (Pus) suna wakiltar mahimman aji na thermoplastic da kuma munanan kayan kwalliya a matsayin kayan aikin su, da kuma hancin sunadarai da yawa za'a iya dacewa da su na polyols daban-daban da poly-iotocyanates.