Polycarbonate (PC) yog ib pawg molecular muaj cov pab pawg molhatic, tau muab faib ua cov pab pawg molecarbonate, cov dav dav hnyav nruab nrab molecular hnyav (MW) hauv 20-100,000.

Daim Duab PC Txheej Txheem Qauv

Polycarbonate muaj lub zog zoo, kev ua kom sov, cov khoom siv hluav taws xob, cov khoom siv hluav taws xob, cov yeeb yam thiab muaj ntau lwm cov teb kuj tau ua tiav ntau yam ntawm Cov ntawv thov, ua ib qho ntawm tsib lub tshuab ua kom nruj huab cua dub nyob rau hauv qeb ceev tshaj plaws.

Xyoo 2020, lub hom phiaj thoob ntiaj teb ntau lawm tau muaj txog li ntawm 960,000 lub peev xwm ntawm thaj tsam ntawm 960 Qhov kev thov khoom lag luam loj tau nyiam ntau txoj kev nqis peev ntau tshaj li 3 lab ntau lawm, thiab lub pc hauv Suav teb tau ntau dua li ntawm kev tsim kho, thiab cov pc ntawm cov khoom lag luam txuas ntxiv ntawm kev hloov pauv mus rau Suav teb.

Yog li, cov txheej txheem ntau lawm ntawm PC? Txoj kev txhim kho keeb kwm ntawm lub PC nyob hauv tsev thiab txawv teb chaws yog dab tsi? Dab tsi yog cov tshuab hluav taws xob tseem ceeb hauv Suav teb? Tom ntej no, peb luv luv ua ib qho zuag ntsis.

PC Peb lub ntsiab lus txheej txheem txheej txheem

Interfacial polycondensation Photogy Txuj Ci, Tsoos Molten Exchat sib pauv qauv thiab tsis-photting txauv qauv yog peb cov txheej txheem tseem ceeb hauv PC.
Daim duab duab
1.. Interfacial Polycondensensation Phosgene txoj kev

Nws yog cov tshuaj tiv thaiv ntawm phosgene mus rau hauv inertolen thiab aqueous sodium phaus polycarbonate, thiab tom qab ntawd condensed rau hauv cov molecular polycarbonate. Nyob rau ib lub sijhawm, kwv yees li 90% ntawm cov khoom muaj polycarbonate cov khoom lag luam tau synthesized los ntawm hom qauv no.

Qhov zoo ntawm kev ua kom haum xeeb Phaj Phaj Cov Paus yog qhov siab txheeb xyuas cov khoom siv hluav taws xob molecular, thiab cov khoom siv ntshiab, zoo dua hydrolysis tsis kam, thiab ua tau yooj yim. Qhov tsis zoo yog tias cov txheej txheem polymerization yuav tsum tau siv cov tshuaj lom thiab lom thiab lom thiab cov tshuaj tsw qab organic thiab cov tshuaj tsw qab organic thiab cov tshuaj uas me me ua rau ib puag ncig kev ua qias tuaj.

Melt Ester Extruct txoj kev, tseem hu ua ontogenic polymerization, siv cov pa roj carbonen, diphenyl carbonate, diphenyl carbonate, diphenyl carbonate, lub zog ua ntej, ua ntej hws, hws tawm cov tshuaj tiv thaiv.

Raws li cov ntaub ntawv raw siv hauv DPC cov txheej txheem, nws tuaj yeem muab faib ua cov qauv tsoos molten txauv qauv (

2. Tsoos Tso Khoom Siv Khoom Siv Ester Exchat sib pauv qauv

Nws tau muab faib ua 2 kauj ruam: (1) phosgene + phenol → dpc; (2) DPC + BPA → PC, uas yog ib qho txheej txheem phosgene indirecene.

Cov txheej txheem luv luv, hnyav-dawb, thiab tus nqi ntau lawm yog qhov qis dua ntawm cov khoom lag luam hauv cosgene, thiab cov khoom siv tau ntau dua ntawm cov khoom lag luam uas muaj txiaj ntsig

3. Cov Phosgene Molt Ester Exchangle

Txoj kev no tau muab faib ua 2 kauj ruam: (1) DMC + Phenol → DPC; (2) DPC + BPA → PC, uas siv Detethyl Carbonate DMC ua cov khoom siv raw thiab phenol los ua ke DPC.

Cov los ntawm-khoom lag luam tau muab tau los ntawm ester txauv thiab hws tuaj yeem rov ua haujlwm rau kev siv cov khoom siv rov qab los thiab kev lag luam zoo; Vim yog lub siab siab ntawm cov khoom nyoos, cov khoom tseem tsis tas yuav qhuav thiab ntxuav, thiab cov khoom lag luam zoo. Tus txheej txheem tsis siv phosgene, yog ib puag ncig phooj ywg, thiab yog ib txoj kev ntsuab.

Nrog rau lub teb chaws yuav tsum tau rau petrochemical qhauj 'kev pov tseg nrog kev siv petrochemical cov kev nyab xeeb, ib puag ncig ntawm petrochemical cov kev nyab xeeb, ib puag ncig kev lag luam ntawm pc ntau lawm tshuab kev txhim kho hauv lub ntiaj teb.