Fluoropolymer Monomer Synthesis: Tetrafluoroethylene;Hexafluoropropylene;Perfluoroalkyl Vinyl Ethers;Chlorotrifluoroethylene;Vinylidene Fluoride;Vinyl Fluoride.
Zvinhu zveTetrafluoroethylene
Tetrafluoroethylene igasi risina ruvara, risinganhuhwi, risinganakidze, risingachetura rinovira pa76.3 C uye rinonyunguduka pa142.5 C. Kupisa kwakanyanya uye kumanikidzwa kweTFE i33.3 C uye 3.92 MPa.TFE inochengetwa semvura;mhute pressure pa20 C ndiyo 1 MPa.Kupisa kwayo kwekugadzirwa kunonzi 151.9 kcal / mole.Polymerization yeTFE yakanyanya exothermic uye inogadzira 41.12 kcal / mole inopisa iyo chiyero chinogona kuenzaniswa nekupisa kwepolymerization yevinyl chloride uye styrene, pa23-26 kcal/mole uye 16.7 kcal/mole, zvichiteerana.
Kuchengetedzwa kwakachengeteka kweTFE kunoda okisijeni yayo kuti ive isingasviki 20 ppm.Kupisa uye kudzvinyirira kunofanira kudzorwa panguva yekuchengetwa kwayo.Kuwedzera tembiricha, kunyanya pakumanikidza kwakanyanya, kunogona kutanga deflagration pasina mweya (TFE inosvibisa kuita kabhoni tetrafluoride).Muhupo hwemhepo kana okisijeni, TFE inoumba misanganiswa inoputika mu molar percentage range ye14-43%.Detonation yemusanganiswa weTFE uye okisijeni inogona kuwedzera kudzvinyirira kwakanyanya kusvika ku100 nguva yekutanga kudzvanywa.
Zvinhu zveHexafluoropropylene
Hexafluoropropylene igasi risina ruvara, risina kunhuhwirira, risinganakidzi, uye rinenge rakaderera toxicity gasi, iyo inovira pa 29.4 C uye inotonhora pa 156.2 C. Mumaawa mana ekuratidzwa, mutsara we3000 ppm wakaenzana neLC50 mumakonzo.Yakakosha tembiricha uye kumanikidzwa kweHFP i85 C uye 3254 MPa.Kusiyana neTFE, HFP yakagadzikana zvakanyanya nekuremekedza autopolymerization uye inogona kuchengetwa munzvimbo yemvura pasina kuwedzera kwetelogen.HFP inogadzikana nekushisa kusvika 400e500 C. Panenge 600 C pasi pevacuum, inoora uye inogadzira octafluoro-2-butene (CF3CF¼CFCF3) uye octa-fluoroisobutylene.
Zvivakwa zvePerfluoroalkyl Vinyl Ethers
Perfluoroalkyl vinyl ethers (PAVE) inoumba kirasi yakakosha yemamonomers mukuti iwo macomonomers esarudzo ye "modification" yezvimiro zvehomofluoropolymers mukuwedzera kune yakafara kushandiswa muchimiro checopolymers eTFE.Iyo madvantage yePAVE semadhizari pamusoro peHFP ndiko kugadzikana kwavo kunoshamisa kwekushisa.Muenzaniso wekutengesa wakakosha ndeye per-fluoropropyl vinyl ether (PPVE).PPVE imvura isinganhuhwi, isina ruvara patembiricha yekamuri.Inopfuta zvakanyanya uye inopisa nemurazvo usina ruvara.Haina muchetura pane HFP.
Zvimiro zveChlorotrifluoroethylene
Chlorotrifluoroethylene igasi risina ruvara pakupisa kwekamuri uye kumanikidza.Izvo zvine muchetura zvine LC50 (gonzo) pa4-awa kuratidzwa uye kusangana kwe4000 ppm.Iine tembiricha yakaoma uye kudzvanywa kwe105.8 C uye 4.03 MPa.Oxygen uye liquid CTFE inobata uye inogadzira peroxides pamhepo yakadzikama.Zvizhinji zvezvigadzirwa zveokisijeni, senge chlorodifluoroacetylfluoride, zvinogadzirwa neoxidation yeCTFE.Izvo zvakafanana zvinogona kuitika photochemically muchikamu chemhute.Chlorotrifluoroethylene oxide ndeye-chigadzirwa chekuita uku.Iyo peroxides inoshanda sevatangi vepolymerization yeCTFE, iyo inogona kuitika nechisimba.
Zvivakwa zveVinylidene Fluoride
Vinylidene fluoride, (CH2¼CF2), [49] inogona kutsva uye igasi patembiricha yemumba.Haina ruvara uye hainhuwidzi uye inovira pa84 C. VDF inogona kugadzira misanganiswa inoputika nemhepo.Polymerization yegasi iri yakanyanya exothermic uye inoitika pamusoro pekupisa kwayo kwakanyanya uye kudzvanywa.
Zvivakwa zveVinyl Fluoride
Vinyl fluoride (75-02-5) (fluoroethene) igasi risina ruvara pamamiriro ekunze.Inopisa mumhepo pakati pemiganhu ye2.6 ne22% nehuwandu.Minimum ignition tembiricha yeVF uye musanganiswa wemhepo i400 C. Kuwedzera trace amount (<0.2%) ye terpenes inoshanda kudzivirira spontaneous polymerization yeVF.Inhibited VF yakarongerwa segasi rinopfuta neUS Department of Transportation.
Nguva yekutumira: May-10-2018