Fluoropolymer Monomer Synthesis: Tetrafluoroethylene;Hexafluoropropylene;Perfluoroalkyl Vinyl Ethers;Chlorotrifluoroethylene;Vinylidene Fluoride;Vinyl Fluoride.
Nā waiwai o Tetrafluoroethylene
ʻO ka Tetrafluoroethylene he kinoea waihoʻoluʻu, ʻala ʻole, ʻono ʻole, ʻona ʻole i hoʻolapalapa ʻia ma 76.3 C a hoʻoheheʻe ʻia ma 142.5 C. ʻO ka wela nui a me ke kaomi o TFE he 33.3 C a me 3.92 MPa.Mālama ʻia ʻo TFE ma ke ʻano he wai;ʻO ke kaomi mahu ma 20 C he 1 MPa.Ua hōʻike ʻia kona wela o ka hoʻokumu ʻana he 151.9 kcal/mole.ʻO ka polymerization o TFE he exothermic nui loa a hoʻohua i ka 41.12 kcal/mole heatd ka nui o ka mea hiki ke hoʻohālikelike ʻia me nā wela o ka polymerization o vinyl chloride a me styrene, ma 23-26 kcal/mole a me 16.7 kcal/mole, kēlā me kēia.
Pono ka mālama ʻana i ka TFE ma lalo o 20 ppm.Pono e mālama ʻia ka mahana a me ke kaomi i ka wā o kona mālama ʻana.ʻO ka hoʻonui ʻana i ka mahana, ʻoi aku ka nui ma nā puʻe kiʻekiʻe, hiki ke hoʻomaka i ka deflagration me ka loaʻa ʻole o ka ea (hoʻemi ka TFE i carbon tetrafluoride).Ma ke alo o ka ea a i ʻole ka oxygen, hana ʻo TFE i nā hui pahū i ka pākēneka molar o 14-43%.Hiki ke hoʻonui i ke kaomi kiʻekiʻe loa i ka 100 manawa o ke kaomi mua ʻana o ka hoʻoheheʻe ʻana o kahi hui o TFE a me ka oxygen.
Nā waiwai o Hexafluoropropylene
ʻO ka Hexafluoropropylene he kinoea kala ʻole, ʻala ʻole, ʻono ʻole, a haʻahaʻa haʻahaʻa, e paila ana ma 29.4 C a maloʻo ma 156.2 C. Ma kahi hōʻike 4-hola, ua pili ka ʻike o 3000 ppm me LC50 i nā ʻiole.ʻO ka mahana koʻikoʻi a me ke kaomi o HFP he 85 C a me 3254 MPa.'A'ole like me TFE, pa'a loa ka HFP e pili ana i ka autopolymerization a hiki ke mālama 'ia i loko o ka wai me ka ho'ohui 'ole o telogen.Hoʻopaʻa ʻia ka HFP a hiki i 400e500 C. Ma kahi o 600 C ma lalo o ka momi, hoʻoheheʻe ia a hana i ka octafluoro-2-butene (CF3CF¼CFCF3) a me ka octa-fluoroisobutylene.
Nā waiwai o Perfluoroalkyl Vinyl Ethers
ʻO Perfluoroalkyl vinyl ethers (PAVE) he papa koʻikoʻi o nā monomers no ka mea he mau comonomers i koho ʻia no ka "hoʻololi" o nā waiwai o nā homofluoropolymers me ka hoʻohana ākea i ke ʻano o nā copolymers o TFE.ʻO ka pōʻino o nā PAVE ma ke ʻano he mea hoʻololi ma luna o ka HFP ʻo ko lākou kūpaʻa wela kupaianaha.ʻO kahi hiʻohiʻona koʻikoʻi ʻoihana ʻo per-fluoropropyl vinyl ether (PPVE).ʻO ka PPVE he wai ʻala ʻole a waihoʻoluʻu ʻole ma ka lumi wela.He lapalapa loa ia a ʻaʻa me ka lapalapa kala ʻole.ʻOi aku ka ʻona ma mua o ka HFP.
Nā waiwai o Chlorotrifluoroethylene
He kinoea kala ʻole ʻo Chlorotrifluoroethylene ma ka lumi wela a me ke kaomi.He mea ʻawaʻawa loa ia me kahi LC50 (iole) ma ka hoʻolaha ʻana o 4-hola a me ka neʻe ʻana o 4000 ppm.He wela koʻikoʻi kona a me ke kaomi o 105.8 C a me 4.03 MPa.Hoʻopili ka Oxygen a me ka wai CTFE a hana i nā peroxide ma nā haʻahaʻa haʻahaʻa haʻahaʻa.ʻO kekahi mau huahana oxygenated, e like me chlorodifluoroacetylfluoride, i hana ʻia e ka oxidation o CTFE.Hiki ke hana like me ka photochemical i loko o ka māhele mahu.ʻO Chlorotrifluoroethylene oxide ka hopena o kēia hopena.Hana nā peroxides i mea hoʻomaka no ka polymerization o CTFE, hiki ke hana ikaika.
Nā waiwai o Vinylidene Fluoride
ʻO Vinylidene fluoride, (CH2¼CF2), [49] hiki ke puhi a he kinoea ma ka wela lumi.ʻAʻole waihoʻoluʻu a ʻaneʻane ʻala ʻole a paila i ka 84 C. Hiki i ka VDF ke hana i nā hui pahū me ka ea.ʻO ka polymerization o kēia kinoea he exothermic loa a hiki ke hana ʻia ma luna o kona wela a me ke kaomi.
Nā waiwai o Vinyl Fluoride
ʻO Vinyl fluoride (75-02-5) (fluoroethene) he kinoea kala ʻole ma nā kūlana ambient.Hiki ke ahi i ka lewa ma waena o nā palena o 2.6 a me 22% ma ka leo.ʻO ka mahana wela liʻiliʻi loa no ka VF a me ka hui ʻana o ka ea he 400 C. ʻO ka hoʻohui ʻana i kahi nui trace (<0.2%) o terpenes he mea kūpono ia e pale aku ai i ka polymerization o VF.Ua hoʻokaʻawale ʻia ʻo VF inhibited ma ke ʻano he kinoea lapalapa e ka US Department of Transportation.
Ka manawa hoʻouna: Mei-10-2018