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Aha Ahịa:polyurtane

Ihe owuwu molular:

Ngwongwo kemịkal:

A na-ebu ụzọ mepụta Polyyo Bayer na 1937. Polyurethane bụ polymer nke ngalaba na-ekwu okwu nwere mosion. Urethanes bụ usoro nke carbamic acid nke dị n'ụdị nke ebe obibi ha [15]. Nnukwu uru nke pu bụ na a bụghị naanị nke atọm na carbon kama nke heteroatoms, oxygen, carbon na nitrogen [4]. Maka ngwa mmepụta ihe, enwere ike iji ihe polyhydyl. N'otu aka ahụ, enwere ike iji ụdị mma nitrogen poly-arụ ọrụ na nnọkọ njikọ ahụ. Site na igbanwe ma digharia polyhydroxyyyyyyyyyyy na polyfuncom na polyfuncontional nitrogen osisi, enwere ike syshessized [15]. A na-eji polyester ma ọ bụ polletat na-eji Hydyy mepụta polyester polyester polyther-pu, [6]. Mgbanwe na ọnụ ọgụgụ nke dochie anya na oghere dị n'etiti na n 'n' ụdọ dị iche iche na-emepụta pus site na linear iji gbazee. A na-ejikwa pirus mee ihe maka imepụta eriri na ịkpụzi [6]. A na-ejikarị pus na-agbanwe agbanwe na mmepụta nke ndị ọrụ na mkpuchi [5]. Plastics na-agbanwe agbanwe na plastics na-acha, nke mejupụtara ọtụtụ nke Pus mepụtara, enwere ike ịchọta ya n'ụdị dị iche iche na ụlọ ọrụ [7]. Iji igwe egwu dị ala, enwere ike ịmepụta ihe dị iche iche. Otu ọnụnọ okwu Hydroxy na-enye ohere maka mgbochi ọzọ, nke a na-akpọ ngalaba, ka itinye ya na Puy. Mgbanwe dị iche iche na akụkụ ndị a na-ebute ogo dịgasị iche iche tensile ike na adminsity. Ihe mgbochi na-enye usoro cringssine ike na nke nwere onye na-eyinye yinye ka ọ bụrụ ngalaba siri ike [7]. Ndị na-enye ndị na-amịpụta ihe nkiri Amorphous na nke nwere polester / pollether dị nro. A na-anara azụmahịa, a na-akpọ polymers ndị a dị ka akụkụ

Ngwa:

Polyurethanes bụ otu n'ime ihe ndị kachasị na ụwa taa. Ọtụtụ n'ime ya sitere na ụfụfụ na-agbanwe agbanwe na arịa ụlọ, ruo ụfụfụ na akpụkpọ ụkwụ, ndị na-elowe na ndị na-elowe nke [17,18]. A na-ejikarị polyYurtanes n'ime afọ iri atọ gara aga n'ọtụtụ ngwa n'ihi nkasi obi ha, uru ego na ụdị ịdị mma gburugburu ebe obibi. Kedu ihe ụfọdụ na-eme polyuranes dị mma? Ndụ Poliurtane na-enye aka na-aga n'ihu ogologo ndụ nke ọtụtụ ngwaahịa. Mgbakwunye nke usoro ndụ ngwaahịa dị mkpa bụ ihe dị mkpa gburugburu ebe obibi na-ahụkarị nhọrọ nke polyuries [19-21]. Polyurethanes (Pus) na-anọchi anya klas dị mkpa nke polymet na thermoset dị ka usoro ha, na ọkụ, na kemịkalụ nke polylols na poly-couclinates dị iche iche.