Polycarbonate(PC) ine mapoka ecarbonate muketani yemamorekuru. Zvinoenderana neakasiyana ester mapoka mune mamorekuru chimiro, anogona kukamurwa kuita aliphatic, alicyclic uye anonhuwirira mapoka. Pakati pavo, boka rinonhuhwirira rine kukosha kwakanyanya kunoshanda. Iyo inonyanya kukosha ndeye bisphenol A polycarbonate, ine huremu hweavhareji mamorekuru huremu (MW) hwe200000 kusvika 100000.

Polycarbonate ine yakanaka yakazara zvivakwa, senge simba, kuoma, kujeka, kupisa kupisa uye kutonhora kutonhora, kugadzirisa nyore uye kunonoka kwemurazvo. Iwo makuru epasi pekushandisa minda midziyo yemagetsi, sheet simbi uye mota. Aya maindasitiri matatu anotora chikamu che80% chepolycarbonate inoshandiswa. Mimwe minda inoshandiswawo zvakanyanya muzvikamu zvemaindasitiri emuchina, CD, kurongedza, zvishandiso zvemuhofisi, kurapwa, firimu, nhandaro nemidziyo yekudzivirira, uye yave imwe yemhando dzinokurumidza kukura dzemapurasitiki mashanu einjiniya.
Nekufambira mberi kwe tekinoroji yenzvimbo, indasitiri yePC yeChina yakasimukira nekukurumidza mumakore achangopfuura. Pakupera kwa2022, chiyero cheindasitiri yePC yeChina chapfuura matani 2.5 miriyoni/gore, uye zvakabuda zvacho zvingangoita miriyoni imwe chete. Parizvino, makambani makuru eChina anosanganisira Kesichuang (600000 matani/gore), Zhejiang Petrochemical (520000 matani/gore), Luxi Chemical (300000 matani/gore) uye Zhongsha Tianjin (260000 matani/gore).
Kubatsira kwematatu PC maitiro
Kune matatu maitiro ekugadzira ePC: isiri phosgene process, transesterification process uye interfacial polycondensation phosgene process. Pane misiyano iri pachena mumidziyo uye mari mukugadzira. Iwo matatu akasiyana maitiro anounza akasiyana purofiti mazinga ePC.
Mumakore mashanu apfuura, purofiti yePC yeChina yakasvika padanho repamusoro muna 2018, yakasvika pa6500 yuan/ton. Zvadaro, chikamu chepurofiti chakadzikira gore negore. Munguva ya2020 na2021, nekuda kwekudzikira kwehuwandu hwekushandisa hwakakonzerwa nedenda, mamiriro epurofiti akadzikira zvakanyanya, uye iyo interface condensation phosgene nzira uye isiri phosgene nzira yakaratidza kurasikirwa kukuru.
Pakupera kwa2022, pundutso yenzira yetransesterification mukugadzirwa kwePC yeChina ndiyo yakanyanya, inosvika 2092 yuan/ton, ichiteverwa neinterface polycondensation phosgene nzira, ine pundutso pa1592 yuan/ton, ukuwo theory yekugadzira purofiti yeisina phosgene nzira. inosvika 292 yuan/ton chete. Mumakore mashanu apfuura, nzira yetransesterification yagara iri nzira ine pundutso yekugadzira muChina yekugadzira PC, nepo iyo isiri phosgene nzira ine isina kusimba pundutso.
Ongororo yezvinhu zvinokanganisa purofiti yePC
Chekutanga, kushanduka kwemutengo webisphenol A uye DMC kune kukanganisa kwakananga pamutengo wePC, kunyanya kuderera kwemutengo webisphenol A, ine huremu hwehuremu hunodarika 50% pamutengo wePC.
Chechipiri, kuchinjika mumusika wevatengi wekupedzisira, kunyanya kushanduka kwehupfumi, kune kukanganisa kwakananga pamusika wevatengi vePC. Semuenzaniso, mukati menguva ya2020 na2021, kana denda rakanganisa, chiyero chekushandisa chemusika wevatengi pamaPC chadzikira, zvichikonzera kudzikira kukuru kwemitengo yePC uye kukanganisa kwakananga pamubairo wemusika wePC.
Muna 2022, kukanganisa kwedenda kuchave kwakakomba. Mutengo wemafuta asina kuchena ucharamba uchidzikira, uye musika wevatengi uchave wakashata. Mazhinji emakemikari ekuChina haasati asvika kune yakajairika purofiti. Sezvo mutengo webisphenol A unoramba wakaderera, mutengo wekugadzira wePC wakaderera. Uye zvakare, iyo yakadzika yakadzoreredza kune imwe nhanho, saka mitengo yemhando dzakasiyana dzekugadzirwa kwePC dzakaramba dzakasimba pundutso, uye purofiti iri kuwedzera zvishoma nezvishoma. Icho chigadzirwa chisingawanzoitiki chine budiriro yepamusoro muindasitiri yemakemikari yeChina. Mune ramangwana, musika webisphenol A ucharamba uine usimbe, uye Mutambo weChirimo wave kusvika. Kana kudzora denda rikaburitswa nenzira yakarongeka, kudiwa kwevatengi kunogona kukura mune wave, uye iyo PC purofiti nzvimbo inogona kuramba ichikura.