Fluoropolymer Monomer Synthesis: Tetrafluoroethylene, Hexafluoropropylene, Perfluoroalkyl Vinyl Ethers, Chlorotrifluoroethylene, Vinylidene Fluoride, Vinyl Fluoride.
Astaamaha Tetrafluoroethylene
Tetrafluoroethylene waa mid aan midab lahayn, ur lahayn, aan dhadhamin, gaas aan sun ahayn oo karkariya 76.3 C oo dhalaalisa 142.5 C. heerkulka muhiimka ah iyo cadaadiska TFE waa 33.3 C iyo 3.92 MPa.TFE waxa loo kaydiyaa dareere ahaan;Cadaadiska uumiga ee 20 C waa 1 MPa.Kuleylkeeda samaynta ayaa lagu soo waramayaa inuu yahay 151.9 kcal/mole.Polymerization ee TFE waa mid aad u sarreeya oo soo saara 41.12 kcal / molo kulaylka xadka kaas oo la barbar dhigi karo kulaylka polymerization of vinyl chloride iyo styrene, at 23-26 kcal / mole iyo 16.7 kcal / mole, siday u kala horreeyaan.
Kaydinta badbaadada leh ee TFE waxay u baahan tahay ogsajiinta ku jirta inay ka yaraato 20 ppm.Heerkulka iyo cadaadiska waa in la xakameeyaa inta lagu jiro kaydinta.Kordhinta heerkulka, gaar ahaan cadaadiska sare, waxay bilaabi kartaa deflagration haddii hawada maqan tahay (TFE waxay hoos u dhigtaa carbon tetrafluoride).Marka ay jirto hawo ama ogsijiin, TFE waxay samaysaa isku-dhafka qarxa ee qiyaasta boqolleyda 14-43%.Qarxinta isku dhafka TFE iyo ogsijiinta waxay kordhin kartaa cadaadiska ugu badan ilaa 100 jeer cadaadiska hore.
Guryaha Hexafluoropropylene
Hexafluoropropylene waa mid aan midab lahayn, ur lahayn, aan dhadhamin, iyo gaasta sunta ah oo aad u yar, kaas oo karkariya 29.4 C oo qaboojiya 156.2 C. Soo-gaadhista 4-saac ah, uruurinta 3000 ppm waxay u dhigantaa LC50 ee jiirka.Heerkulka daran iyo cadaadiska HFP waa 85 C iyo 3254 MPa.Si ka duwan TFE, HFP aad bay u deggan tahay marka la eego is-dabaynta oo waxa lagu kaydin karaa xaalad dareere ah iyada oo aan lagu darin telogen.HFP heerkul ahaan waa xasiloon ilaa 400e500 C. Qiyaastii 600 C ee faakuumka hoostiisa, way jajabisaa oo soo saartaa octafluoro-2-butene (CF3CF¼CFCF3) iyo octa-fluoroisobutylene.
Guryaha Perfluoroalkyl Vinyl Ethers
Perfluoroalkyl vinyl ethers (PAVE) waxay sameeyaan nooc muhiim ah oo monomers ah taas oo ah inay yihiin kuwa door bidaaya "wax ka beddelka" sifooyinka homofluoropolymers marka lagu daro isticmaalka ballaaran ee dhismaha copolymers ee TFE.Faa'iidada PAVE-yada sida wax ka beddelka HFP waa xasilloonida kulaylka ee cajiibka ah.Tusaalaha ganacsi ahaan muhiimka ah waa per-fluoropropyl vinyl ether (PPVE).PPVE waa dareere aan ur lahayn, midab lahayn oo heerkulka qolka ku jira.Aad bay u ololaysaa waxayna ku gubataa olol aan midab lahayn.Way ka sun yar tahay HFP.
Astaamaha chlorotrifluoroethylene
Chlorotrifluoroethylene waa gaas aan midab lahayn heerkulka qolka iyo cadaadiska.Waxay si cadaalad ah ugu suntan LC50 (jiir) marka ay 4-saac soo bandhigto iyo fiirsashada 4000 ppm.Waxay leedahay heerkul halis ah iyo cadaadis ah 105.8 C iyo 4.03 MPa.Ogsajiinta iyo dareeraha CTFE waxay ka falceliyaan oo sameeyaan peroxides heerkul aad u hooseeya.Tiro ka mid ah badeecooyinka ogsijiinta leh, sida chlorodifluoroacetylfluoride, ayaa ka dhasha oksaydhka CTFE.Dareen-celin isku mid ah ayaa ku dhici karta photochemically wajiga uumiga.Chlorotrifluoroethylene oxide waa ka-soo-saarka fal-celintan.peroxides-yadu waxay u dhaqmaan sidii hindiseyaal loogu talagalay polymerization of CTFE, taas oo si xun u dhici karta.
Qalabka Vinylidene Fluoride
Vinylidene fluoride, (CH2¼CF2), waa [49] gubanaya waana gaas ku jira heerkulka qolka.Midab ma leh oo ku dhawaad ur ma leh oo waxay ku soo kacdaa 84 C. VDF waxay samayn kartaa isku-dhafka walxaha qarxa oo hawo leh.Polymerization gaaskani waa mid aad u heersare ah oo ka sarreeya heerkulkiisa iyo cadaadiska muhiimka ah.
Guryaha Vinyl Fluoride
Vinyl fluoride (75-02-5) (fluoroethene) waa gaas aan midab lahayn marka la eego xaaladaha deegaanka.Waxay ku gubanaysaa hawada inta u dhaxaysa xadka 2.6 iyo 22% mugga.Heerkulka dabka ugu yar ee VF iyo isku dhafka hawada waa 400 C. Ku darida qadarka raadadka (<0.2%) ee terpenes waa wax ku ool ah si looga hortago polymerization-ka ee VF.VF-da la xannibay ayaa Waaxda Gaadiidka ee Mareykanka ay u kala saartay sidii gaas guban kara.
Waqtiga boostada: May-10-2018