Polikondensatlanish (Yun. polys \u2014 ko’p sonli va kondensasiya) \u2014 bi – yoki polifunktsional monomer va (yoki) oligomerlar ta’sirida poli-merlar sintez qilish jarayoni. Bunda polimer b-n bir qatorda suv, spirt, ammiak, vodo- rod galogenid, tegishli tuzlar va shunga o’xshash quyi molekulali moddalar ajra- lib chiqadi. P. reaktsiyasi gomopolikondensat- lanish va geteropolikondensatlanish- ga bo’linadi. Gomopolikondensatlanish da bir moddaning 2 xil funktsional guruhi o’zaro reaktsiyaga kirishib, po- limer hosil qiladi. Bunday reaktsiyaga aminokislotalar, amino-spirtlar va OK- sikislotalarning polikondensatlani- shi misol bo’la oladi (mas, aminokapron kislotadan poli-kaprolaktam hosil bo’lishi). Getero-polikondensatlanish reaktsiya-sida funktsional guruxlari bir xil bo’lgan bifunktsional guruxli 2 modda qatnashadi. Geksametilendiamin va adipin kislotadan poligeksameti- Len-adipinamid hosil bo’lishi bunday reaktsiyaga misol bo’la oladi. Bifunktsi- onal birikmalarning polikondensatla- nishi natijasida faqat chiziqsimon po- limerlar hosil bo’ladi. Bunday ja-rayon chiziqsimon polikondensatlanish deyi- ladi. Reaktsiyaga kirishayotgan monomer- larning birida 3 va undan ortiq funk- tsional guruxlar bo’lishi polikondensat- lanish reak-tsiyasini murakkablashtira- Di va to’rsimon hamda fazoviy tuzilish- ga ega bo’lgan makromolekulalar hosil qiladi. Bujarayon fazoviy polikon-den- satlanish deyiladi. P. jarayo-nining tabiat va texnikadagi ahamiya-ti katta. P. va unga o’xshash reaktsiyalar muhim bio- polimerlar \u2014 oqsillar, nuklein kislo- talar, tsellyuloza va h.k. biosintezining asosini tashkil etadi. P. reaktsiyalari yuqori molekulali birikmalar (poliamidlar, poliefir- lar, polikarbonatlar, fenol-formal- degid, mochevina-formaldegid, Mela- min-formaldegid smolalar, kremniy organik va maxsus xossali polimerlar) olishda qo’llanadi.<\/p>\n","protected":false},"excerpt":{"rendered":"
Polikondensatlanish (Yun. polys \u2014 ko’p sonli va kondensasiya) \u2014 bi – yoki polifunktsional monomer va (yoki) oligomerlar ta’sirida poli-merlar sintez qilish jarayoni. Bunda polimer b-n bir qatorda suv, spirt, ammiak, … Read More<\/a><\/p>\n","protected":false},"author":1,"featured_media":99837,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[226],"tags":[],"class_list":["post-118836","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-p-harfi","entry"],"translation":{"provider":"WPGlobus","version":"3.0.2","language":"kr","enabled_languages":["uz","kr","ru"],"languages":{"uz":{"title":true,"content":true,"excerpt":false},"kr":{"title":false,"content":false,"excerpt":false},"ru":{"title":false,"content":false,"excerpt":false}}},"_links":{"self":[{"href":"https:\/\/milliycha.uz\/kr\/wp-json\/wp\/v2\/posts\/118836","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/milliycha.uz\/kr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/milliycha.uz\/kr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/milliycha.uz\/kr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/milliycha.uz\/kr\/wp-json\/wp\/v2\/comments?post=118836"}],"version-history":[{"count":1,"href":"https:\/\/milliycha.uz\/kr\/wp-json\/wp\/v2\/posts\/118836\/revisions"}],"predecessor-version":[{"id":118868,"href":"https:\/\/milliycha.uz\/kr\/wp-json\/wp\/v2\/posts\/118836\/revisions\/118868"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/milliycha.uz\/kr\/wp-json\/wp\/v2\/media\/99837"}],"wp:attachment":[{"href":"https:\/\/milliycha.uz\/kr\/wp-json\/wp\/v2\/media?parent=118836"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/milliycha.uz\/kr\/wp-json\/wp\/v2\/categories?post=118836"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/milliycha.uz\/kr\/wp-json\/wp\/v2\/tags?post=118836"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}