Polycarbonate (PC) ndi unyolo wokhala ndi gulu la carbonate, malinga ndi magulu a esterconol, alongo ofunika kwambiri a gulu la polycarbonate (MW) mu 20-100,000.

Chithunzi cha PC PC

Polycarbonate ali ndi mphamvu yabwino, kukhazikika, kuwonekera, kutentha ndi kukana kwa magetsi, mafinya, mafilimu, zopumira ndi minda ina yambiri ndinapezanso mapulogalamu osiyanasiyana, kukhala amodzi mwa mapulastiyi asanu aukadaulo mu gulu lokulirapo kwambiri.

Mu 2020, opanga matani apadziko lonse lapansi a matani 5.88 miliyoni, pachaka / chaka cha PC, ndikupanga matani pafupifupi matani a Polycarborbonal. Kufuna kwakukulu pamsika kwakopa ndalama zambiri kuti zikuwonjezereka, akuti pali mapulani ambiri a PC omwe ali m'ndende zaka zitatu kapena chaka chimodzi, ndipo makampani opanga a PC amawonetsa kuti apititsa patsogolo ku China.

Ndiye, ndi njira ziti za PC? Kodi mbiri yakukula ya PC kunyumba ndi yakunja ndi chiyani? Kodi opanga zazikulu ndi PC ndi chiyani? Kenako, timakonda mwachidule.

PC atatu opanga njira zopangira

Njira ya Milfic Maplycomenscation, mawonekedwe osungunula a Ester Onliction Njira Njira Yolten ESRS ndi njira zitatu zazikuluzikulu mu PC.
Chithunzi
1.

Ndi zomwe Phosgene adachita zosungunulira ndi sodium hydroxide njira ya bisphenol a kupanga magetsi a polycarbonate. Nthawi inayake, pafupifupi 90% ya zinthu zothandizira mafakitale zidapangidwa ndi njirayi.

Ubwino wa polycondeacial polycomene njira ndi kulemera kwapadera kwa kuchuluka kwa 1.5 ~ 2 * 105, ndi malonda oyenerera, kukhazikika kwa hydrolysis, komanso kukonza kosavuta. Zovuta ndikuti njira yophukira imafunikira kugwiritsa ntchito phosgene phoscne ndi poizoni ndi osasunthika komanso methylene chloride, zomwe zimayambitsa kuipitsa kwachilengedwe.

Njira yosinthira Ester Edunt Esust, yomwe imadziwikanso kuti ku Oretogenic Polymerization, adayamba kupanga baybonol (DPHCH), RAUCH), kusinthika kwapamwamba kwa ESTS, Chisanachitike.

Malinga ndi zopangira zomwe zimagwiritsidwa ntchito mu DPC, zitha kugawidwa m'njira zosinthana ndi Ester.

2. Njira yachikhalidwe yosinthira

Lagawidwa m'magawo awiri: (1) Phosgene + phenol → DPC; (2) DPC + BPA → PC, yomwe ndi njira yachidule ya phosgene.

Njirayi ndi yopanda pake, yosungunulira, ndipo mtengo wopanga ndi wotsika pang'ono kuposa njira ya DPCEne, koma njira ya DPC ili ndi magulu omaliza a PC, komwe kumakhudzanso kukwezedwa kwa PC.

3..

Njirayi imagawidwa m'masitepe awiri: (1) DMC + Phenol → DPC; .

Phenol phenol yomwe idapezeka ku EST Kusintha ndi kuphatikizidwa kumatha kubwezeredwanso ku kapangidwe ka DPC, ndikukwaniritsa zomwe zimakwaniritsa zinthu zabwino; Chifukwa cha kuyera kokwanira kwa zinthu zopangira, chinthuchonso sichikufunikanso kuwuma ndikutsukidwa, ndipo malonda ndi abwino. Njira sizigwiritsa ntchito phosgene, zimakhala zachilengedwe, ndipo ndi njira yobiriwira.

Ndi zofuna za dziko la nyama ya Petrochemical 'Zinyalala zitatu ndi kuchuluka kwa zofuna zadziko komanso kuteteza kwaukadaulo pang'onopang'ono.