Polyester. Gịnị bụ nke a stof, na ihe bụ ojiji

N'oge ndị ahụ, mgbe dị iche iche Polymers na plastik e ifịk ifịk emejuputa ná ndụ kwa ụbọchị, ndị mmadụ chere na ya na enyemaka ha nwere ike idozi nsogbu nile, ukwuu n'ihi na eke ihe. Nke a na nkà mmụta sayensị-oru na chemical anuri kere si mbubreyo forties nke seventies, ruo mgbe a kpọrọ mmadụ na-eme ka n'aka na owu, linen ma ọ bụ ajị anụ uwe bụ ka ọtụtụ mgbe mma karịa ihe ọ bụla sịntetik. Otú ọ dị, ndị ọtụtụ iri afọ ndị ahụ abụghị n'efu, ọtụtụ nnọọ ihe bara uru na bara uru àgwà Polymers kere ọnọdụ ha dum ngwa dị iche iche ubi nke mmadụ ọrụ.

Otu n'ime ihe ndị kasị sịntetik ihe onwunwe bụ polyester. Gịnị bụ ngwaahịa a n'ihi na mmepụta nke ụfọdụ ngwaahịa ọ na-eji ugbu a? Iji zaa ajụjụ ndị a, otu ga-akpa ịghọta chemical na n'ibu Njirimara nke polima.

Dị ka ihe onwunwe bụ a polyester multimolecular polyether yinye. Na njikọ nke na polima-enwe ike agbụ, nke-eme ka ọ ukwuu ike. Mgbe etinyere uwe nke a pụtara na ya elu iguzogide akwa na crease. Bụ nke a mma? N'ezie, n'ihi na ụfọdụ n'ime àgwà ndị dị oké mkpa mposi isiokwu, nakwa dị ka ike iguzogide mmiri. Ma, ihe niile nwere a downside. Low mmiri absorption na isi nke ihe onwunwe-eme ka ọ na-ata na ikwu na akpụkpọ elu. Ma okwu banyere polyester na bụ kpam kpam ekwesighi ákwà uwe, ị nwere ike ọ bụghị nanị na ya akporo ókè.

Mba dị iche iche nwere dị iche iche ahia aha, nke na-ẹkedọhọde polyester. Mejupụtara nke ngwaọrụ Enwere ike ikpokọta, ka ihe atụ, "65% ajị, 35% polyester." Okwu bụ, ke akpa ilekiri, ndị mba ọzọ na, n'eziokwu, bụ afo, nke Academy nke Sciences - Academy nke Sciences, na akwụkwọ ozi ndị "L", "A" na "B" pụtara a n'ụlọ ime nnyocha nke elu-molekụla ogige. Ke United States, a na ihe onwunwe na-emepụta n'okpuru aha "Dacron".

Nkà na ụzụ, a polima na ọtụtụ-eji n'ihi na pụrụ iche Njirimara. Ka ihe atụ, n'ihi na mmepụta nke nkwakọ ihe na-achọ elu ike, obosara polyester eji. Gịnị bụ ihe ndị a mara? Anwụ ngwa ngwa maka tightening strapping Bales-enwe n'ụzọ imezi compressive ike bụ naanị ubé usụhọde iguzogide n'ịkwatu nke metal warara, agaghi asu polima ọtụtụ mfe ma, ihe, obere ígwè. Ike polyester filaments akpata ha ngwa n'ebe ndị onuete kwesịrị nnọọ pụrụ ịtụkwasị obi, na ụdọ, kpara si ha, nwere ike idi nnukwu ibu.

Ke uwa ugbo elu ụlọ ọrụ na-ewu ugbo ala ikpeazụ iri afọ nwekwara e ifịk ifịk ịgbasa akporo ngwa nke ọtụtụ ihe mejupụtara polymeric ihe. Ihe ọ bụla ihe, nke na-etinyere kama n'ichepụta dural plastic, na-ebelata ibu na mma corrosion eguzogide. Military ụgbọelu, a polyester nwere ihe ọzọ dị mkpa onwunwe: na-eme nchọpụta chọpụtara site n'inyocha polyester, ọ radioprovodyaschy ihe onwunwe. Nke a onwunwe enye gị ohere igosi ya Rada radomes na ugbo elu silhouette aghọ obere anya ka onye iro ntụ ozize kwere omume.