I-Polycarbonate (PC) iyi-chain yama-molecular equkethe iqembu le-carbonate, ngokusho kwesakhiwo samangqamuzana anamaqembu ahlukene, angahlukaniswa ngokubaluleka kwe-aliphatic, kanye ne-bisphenol ebaluleke kakhulu isisindo se-polycarbonate (MW) ngo-20-100,000.

Isithombe sefomula yesakhiwo

I-Polycarbonate inamandla amahle, ukuqina, ukucaca, ukushibilika nokuphikisa okubandayo, ukucubungula okulula, ukunakekelwa kwezokwelapha, ukunakekelwa kwezokwelapha, ukunakekelwa kwezokwelapha, amafilimu okulibazisa kanye neminye imikhakha eminingi Uthole futhi uhla oluhlukahlukene lwezicelo, ukuba ngenye yamapulasitiki amahlanu wobunjiniyela esigabeni esikhulayo esisheshayo.

Ngo-2020, umthamo wokukhiqizwa we-PC womhlaba wonke wamathani ayizigidi ezi-5.88, umthamo wokukhiqiza ama-PC wezigidi eziyi-1.94, ukukhiqizwa kwamathani angama-960,000 eChina, kudingeka angenise amathani acishe abe yizigidi eziyi-1,38, kudingeka angenise emazweni angaphandle. Isidingo esikhulu semakethe sidonsele ukutshalwa kwezimali okuningi ukwandisa ukukhiqizwa, kulinganiselwa ukuthi kunamaphrojekthi amaningi we-PC ezakhiwa futhi ahlongozwayo eChina ngasikhathi sinye, futhi umthamo we-PC uveza ukuthambekela okusheshayo kweChina.

Ngakho-ke, yiziphi izinqubo zokukhiqiza ze-PC? Uyini umlando wentuthuko we-PC ekhaya nakwamanye amazwe? Yini abakhiqizi be-PC abaphambili eChina? Okulandelayo, nathi kafushane sikwenza ikamu.

PC ezintathu zenqubo yokukhiqiza yokukhiqiza

Indlela ye-Pholyconderation ye-Pholyconderation, indlela yendabuko yendabuko e-Ester yokushintshaniswa kanye ne-non-Photogas Molten Eerte Exchange Reclatness yizinqubo ezintathu eziphambili zokukhiqiza embonini ye-PC.
Isithombe esithombeni
1. Indlela yokuxhumana ye-polycondessation ye-Phosgene

Kungukusabela kwePhosgene ku-inert solvent kanye ne-aquoud sodium hydroxide solution ye-bisphenol a ukukhiqiza isisindo esincane se-polycarbonale, bese kuncishiswa ku-polycarbonate ephezulu. Ngesinye isikhathi, cishe ama-90% emikhiqizo yezimboni ye-polycarbonate imikhiqizo yahlelwa ngale ndlela.

Izinzuzo ze-interfacial polycondenbation phosgene indlela PC ziyisisindo esiphezulu se-molecular isisindo, esingafinyelela ku-1.5 ~ 2 * 105, nemikhiqizo emsulwa, ukumelana kahle kwe-hydrolysis, kanye nokuqina okulula. Okubi ukuthi inqubo ye-polymerization idinga ukusetshenziswa kwe-phosgene enobuthi kakhulu kanye nezinto ezinobuthi kanye nezinto eziguquguqukayo ezifana ne-methylene chloride, okubangela ukungcoliswa okukhulu kwemvelo.

Indlela yokushintshanisa ye-Melt Ester, eyaziwa nangokuthi i-Ontogenic Polymerization, yaqala ukuthuthukiswa yiBayer, i-DiphEnyl Carbonate (DIPHYL Carbonate, i-DIPCC), i-Catalyst Presence State, i-Catalyst Presence State Study for Ester Exchange,

Ngokwezinto zokwakha ezisetshenziswayo ezisetshenziselwa inqubo ye-DPC, zingahlukaniswa ngendabuko yendabuko ye-Ester Ester (eyaziwa nangokuthi indlela engaqondile ye-Photogas) ne-non-Photogas Ester Eartenan Exchanger.

2

Ihlukaniswe izinyathelo ezi-2: (1) Phosgene + phenol → DPC; (2) I-DPC + BPA → I-PC, okuyinqubo eqondile ye-phosgene.

Le nqubo imfushane, i-solvent-free, futhi izindleko zokukhiqiza ziphansi kancane kunendlela yokuvuselela i-DPC isasebenzisa ama-phosgene, kanti umkhiqizo we-DPC uqukethe amanani okugcina we-PC, okuzothinta ikhwalithi yomkhiqizo wokugcina we-PC, okuthi ngezinga elithile lilinganise ukukhushulwa kwenqubo.

3. Indlela Engelona-Phosgene Mollten Ester Earnction

Le ndlela ihlukaniswe ngezinyathelo ezi-2: (1) DMC + phenol → DPC; (2) I-DPC + BPA → PC, esebenzisa i-Dimethyl Carbonate DMC njengento eluhlaza kanye ne-phenol ukuhlanganisa i-DPC.

I-Penol yomkhiqizo etholakala ku-Ester Exchange kanye nokuvuselelwa kungavuselelwa kabusha ekuhlolweni kwenqubo ye-DPC, ngaleyo ndlela kufinyelele ukusetshenziswa kabusha kwezinto ezibonakalayo kanye nomnotho omuhle; Ngenxa yobumsulwa obuphezulu bezinto ezisetshenziswayo, umkhiqizo futhi awudingi ukomiswa futhi ugezwe, futhi ikhwalithi yomkhiqizo ilungile. Inqubo ayisebenzisi i-phosgene, inobungani bemvelo, futhi yindlela eluhlaza yenqubo.

Ngezidingo zikazwelonke zama-Enterchemical Enterprises 'kakhundla amathathu ngokukhuphuka kwezidingo zikazwelonke ekuvikelekeni nasekuvikelweni kwemvelo kwamabhizinisi we-Petrochemical kanye nokuvinjelwa kwe-POSYCELIAL TOURGENCEST METALL ngokuzayo njengokuthuthukiswa kobuchwepheshe be-PC ngokuzayo emhlabeni.