PVC yaimbova yakakura pasi rose-chinangwa chepurasitiki mukugadzirwa uye kushandiswa zvakanyanya.Inoshandiswa zvakanyanya mukuvaka, zvigadzirwa zvemaindasitiri, zvinodiwa zvezuva nezuva, dehwe repasi, mataira epasi, dehwe rekugadzira, pombi, waya netambo, kurongedza mafirimu, mabhodhoro, zvinhu zvinopupuma, zvekuisa chisimbiso, fiber, uye mimwe minda.
Nekudaro, muna Gumiguru 27, 2017, rondedzero yecarcinogen yakaburitswa neInternational Agency for Research on Cancer yeWorld Health Organisation (WHO) yakatanga kuunganidzwa uye kutaurwa, uye PVC yakaverengerwa murondedzero yeClass 3 carcinogen.Vinyl chloride, seyakagadziriswa yePVC synthesis, yakanyorwa mune rondedzero yeKirasi I carcinogen.
01 Zvinyorwa zvevinyl chloride zvinhu muzvigadzirwa zveshangu
Vinyl chloride, inozivikanwawo sevinyl chloride, ndeye organic compound ine kemikari formula C2H3Cl.Iyo yakakosha monomer mune polymer chemistry uye inogona kuwanikwa kubva ethylene kana acetylene.Inonyanya kushandiswa kugadzira homopolymers uye copolymers ye polyvinyl chloride.Inogona zvakare kuve copolymerized nevinyl acetate, butadiene, nezvimwewo, uye inogona zvakare kuveinoshandiswa sechinhu chinobvisa dhayi nezvinonhuwira.Inogona zvakare kushandiswa secomonomer kune akasiyana mapolymers.Kunyange zvazvo vinyl chloride inokosha mbishi muindasitiri yepurasitiki, inogonawo kushandiswa sefiriji, nezvimwewo. Inogonawo kushandiswa sechinhu chinobvisa dhayi nezvinonhuwira.Mukugadzira shangu uye zvigadzirwa zvembatya, vinyl chloride inoshandiswa kugadzira polyvinyl chloride (PVC) uye vinyl polymers, inogona kuve yakaoma kana kuchinjika zvinhu.Kunogona kushandiswa kwePVC kunosanganisira kudhindwa kwepurasitiki skrini, zvikamu zvepurasitiki, uye machira akasiyana-siyana pamatehwe, matehwe ekugadzira, uye machira.
Iyo yakasara vinyl chloride monomer mune iyo yakagadzirwa kubva kuvinyl chloride inogona kuburitswa zvishoma nezvishoma muzvinyorwa, izvo zvine chekuita pahutano hwevatengi uye nharaunda yezvakatipoteredza.
02 Njodzi dzevinyl chloride zvinhu
Vinyl chloride inogona kutora chikamu muphotochemical smog reactions mumhoteredzo, asi nekuda kwekusagadzikana kwayo kwakasimba, inowanzoitika kufotolysis mumhepo.Vinyl chloride monomer inoisa njodzi dzakasiyana kune vashandi nevatengi, zvichienderana nerudzi rwemonomeri uye nzira yekuratidzwa.Chloroethylene igasi risina ruvara patembiricha yekamuri, ine kutapira kudiki kunosvika 3000 ppm.Acute (nguva pfupi) kuratidzwa kune yakanyanya kuwanda kwevinyl chloride mumhepo inogona kuve nemhedzisiro pane yepakati tsinga system (CNS),zvakadai sedzungu, kukotsira, uye kutemwa nemusoro.Kufemba kwenguva refu uye kuratidzwa kune vinyl chloride kunogona kukonzera kenza yechiropa.
Parizvino, misika yeEurope neAmerica yakatarisana nekushandiswa kwevinyl chloride monomers muPVC zvinhu uye zvigadzirwa zvavo, uye vakaita zvemitemo kutonga.Mazhinji anozivikanwa mabhureki epasi rese anoda kuti PVC zvinhu zvirambidzwe muzvigadzirwa zvavo zvevatengi.Kana PVC kana zvinhu zvine PVC zvichidikanwa nekuda kwezvikonzero zvetekinoroji, zvirimo zvevinyl chloride monomers mune izvo zvinhu zvinofanirwa kudzorwa.Iyo International RSL Management Working Boka yeKupfeka uye Shangu AFIRM, yechinomwe Edition 2022, inoda kutiiyo VCM yemukati mumidziyo haifanire kudarika 1ppm.
Vagadziri uye mabhizinesi anofanirwa kusimbaradza kugovera ketani kutonga,ine tarisiro chaiyo uye kudzora zvirimo zvevinyl chloride monomers muPVC zvinhu, epurasitiki skrini inodhinda, epurasitiki zvikamu, uye akasiyana PVC machira pamatehwe, ekugadzira matehwe, uye machira..Panguva imwecheteyo, zvinodikanwa zvakare kutarisisa kukwenenzverwa kwemaitiro ekugadzira, kuvandudza hunhu hwekutonga hurongwa, uye nekuwedzera kuvandudza mwero wekuchengetedzwa kwechigadzirwa uye mhando kuti ienderane nezvakakodzera kutonga zvinodiwa.
Nguva yekutumira: Kubvumbi-14-2023