{"id":942,"date":"2011-01-08T14:33:48","date_gmt":"2011-01-08T12:33:48","guid":{"rendered":"http:\/\/www.ilkkimbuldu.com\/?p=942"},"modified":"2016-12-25T17:45:09","modified_gmt":"2016-12-25T15:45:09","slug":"politen","status":"publish","type":"post","link":"https:\/\/www.ilkkimbuldu.com\/?p=942","title":{"rendered":"Politen&#8217;i kim buldu"},"content":{"rendered":"<p>B\u00fct\u00fcn plastikler i\u00e7inde belki de en \u00e7ok kullan\u0131lan\u0131 politendir. Bula\u015f\u0131k kaplar\u0131, s\u0131k\u0131nca i\u00e7in-dekini ak\u0131tan deterjan \u015fi\u015feleri, plastik \u00e7antalar ve benzeri pek \u00e7ok e\u015fya politenden yap\u0131l\u0131r. Politen 1933 y\u0131l\u0131n\u0131n Mart ay\u0131da, \u0130ngiltere&#8217;nin Cheshire kentindeki ICI laboratuvarlar\u0131nda <strong>R.O. Gibson<\/strong> taraf\u0131ndan elde edildi.<\/p>\n<p>Gibson, etilen ile benzaldehidi, 170 santigrat derecede tepkimeye soktu ve elde etti\u011fi sonucu defterine \u015f\u00f6yle yazd\u0131: &#8220;Sonu\u00e7ta, tepkime kab\u0131n\u0131n i\u00e7 \u00e7eperini kaplayan beyaz bir madde kal\u0131yor.&#8221; Politenin ilk kullan\u0131m\u0131 ise, yal\u0131t\u0131m amac\u0131yla oldu. 1939 y\u0131l\u0131n\u0131n Temmuz ay\u0131nda Telegraph Construction and Maintenanca Co. adl\u0131 \u015firket, bir mil uzunlu\u011fundaki sualt\u0131 kablosunu politen ipi ile kaplad\u0131 ve Wight Adas\u0131 ile Britanya Adas\u0131 aras\u0131na yerle\u015ftirdi.<\/p>\n<p><b>Polietilen<\/b>, \u00e7ok \u00e7e\u015fitli \u00fcr\u00fcnlerde kullan\u0131lan bir termoplastiktir. \u0130smini monomer haldeki etilenden al\u0131r, etilen kullan\u0131larak polietilen \u00fcretilir. Plastik end\u00fcstrisinde genelde ismi k\u0131saca PE olarak kullan\u0131l\u0131r.<\/p>\n<p>Etilen molek\u00fcl\u00fc C<sub>2<\/sub>H<sub>4<\/sub> , asl\u0131nda \u00e7ift ba\u011f ile ba\u011flanm\u0131\u015f iki CH<sub>2<\/sub>\u2019den olu\u015fur. (CH<sub>2<\/sub>=CH<sub>2<\/sub>)<\/p>\n<p>Polietilenin \u00fcretim \u015fekli, etilenin polimerizasyonu ile olur. Polimerizasyon metodu, radikal polimerizasyon, anyonik polimerizasyon, iyon koordinasyon polimerizasyonu ve katyonik polimerizasyon metotlar\u0131 ile olabilir. Bu metotlar\u0131n her biri farkl\u0131 tipte polietilen \u00fcretimi sa\u011flar.<\/p>\n<p>\u00d6zellikleri tiplere g\u00f6re de\u011fi\u015fiklik g\u00f6sterse de; d\u0131\u015f ortam ko\u015fullar\u0131 ve neme kar\u015f\u0131 iyi diren\u00e7, esneklik, zay\u0131f mekaniksel kuvvet ve \u00fcst\u00fcn kimyasal diren\u00e7 genel \u00f6zellikleri olarak say\u0131labilir. Kaplar, plastik kutular, mutfak e\u015fyalar\u0131, kaplamalar, boru ve t\u00fcp, oyuncak, kablolarda yal\u0131tkan tabakalar, paketleme ve ambalaj filmi gibi \u00e7ok yayg\u0131n bir kullan\u0131m alan\u0131 olup. D\u00fc\u015f\u00fck maliyetlidir.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>B\u00fct\u00fcn plastikler i\u00e7inde belki de en \u00e7ok kullan\u0131lan\u0131 politendir. Bula\u015f\u0131k kaplar\u0131, s\u0131k\u0131nca i\u00e7in-dekini ak\u0131tan deterjan \u015fi\u015feleri, plastik \u00e7antalar ve benzeri pek \u00e7ok e\u015fya politenden yap\u0131l\u0131r. Politen 1933 y\u0131l\u0131n\u0131n Mart ay\u0131da,&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[92,20],"tags":[545],"class_list":["post-942","post","type-post","status-publish","format-standard","hentry","category-bilim","category-ev","tag-politen"],"_links":{"self":[{"href":"https:\/\/www.ilkkimbuldu.com\/index.php?rest_route=\/wp\/v2\/posts\/942"}],"collection":[{"href":"https:\/\/www.ilkkimbuldu.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ilkkimbuldu.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ilkkimbuldu.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ilkkimbuldu.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=942"}],"version-history":[{"count":5,"href":"https:\/\/www.ilkkimbuldu.com\/index.php?rest_route=\/wp\/v2\/posts\/942\/revisions"}],"predecessor-version":[{"id":6708,"href":"https:\/\/www.ilkkimbuldu.com\/index.php?rest_route=\/wp\/v2\/posts\/942\/revisions\/6708"}],"wp:attachment":[{"href":"https:\/\/www.ilkkimbuldu.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=942"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ilkkimbuldu.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=942"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ilkkimbuldu.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=942"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}