Polytetrafluoroethylene bụ fluoropolymer sịntetik nke tetrafluoroethylene nke nwere ọtụtụ ngwa.Aha kacha mara amara nke usoro dabere na PTFE bụ polymer site na Chemours.Ebe mgbaze: 620.3°F (326.8°C); Usoro: (C2F4) n; Njupụta: 2.2 g/cm³; IUPAC ID: poly(1,1,2,2-tetrafluoroethylene).
A na-emepụta PTFE site na usoro polymerization free-radical na mgbasa ozi aqueous site na mgbakwunye polymerization nke TFE na usoro ogbe.Onye na-ebido maka polymerization na-abụkarị peroxide na-agbaze mmiri dị ka ammonium persulfate ma ọ bụ disuccinic peroxide.A na-eji redox catalyst mee ihe maka polymerization dị ala.A na-emepụta PTFE site na nkwusioru (ma ọ bụ slurry) polymerization na-enweghị surfactant iji nweta resins granular ma ọ bụ na-eji perfluorinated surfactant (emulsion polymerization) dị ka ammonium perfluorooctanoate iji mepụta ezigbo ntụ ntụ na ngwaahịa mgbasa.Polymerization okpomọkụ na nrụgide na-adịkarị site na 0 ruo 100 C na 0.7 ruo 3.5 MPa.
A na-emepụta PTFE granular site na polymerizing TFE naanị ma ọ bụ site na iji ọnụọgụ ọnụọgụ nke comonomers.Onye na-ebido peroxide, obere ma ọ bụ enweghị surfactant, yana ihe mgbakwunye ndị ọzọ nwere ike ịdị na ọkara polymerization nke a na-akpali ike na mgbe ụfọdụ site na ngwọta alkaline.A na-emepụta ọtụtụ n'ime polymer na oge gas n'ụdị nke eriri na ihe ndị na-adịghị agbanwe agbanwe.A na-ejikọta ihe ndị ahụ na nha dị iche iche, dabere na njirimara ntụ ntụ nke usoro mmepụta ihe chọrọ.Dị ka ihe atụ, a smoother elu akụkụ chọrọ nta urughuru size mgbe ezi eruba na-mma site ibu urughuru size.
A na-emepụta PTFE ntụ ntụ dị mma site na polymerization nke TFE na mmiri mmiri na-anọ n'ihu onye mmalite na surfactant.polymerization anaghị agbaso usoro emulsion nkịtị kama ụfọdụ ụkpụrụ, nke na-emetụta.Nkwụsi ike nke mgbasa n'oge polymerization, iji zere coagulation akaghi aka, bụ nke ziri ezi megide mkpa ọ dị imebi emulsion iji weghachite PTFE.A na-edobe mkpasu iwe dị ala n'oge polymerization na-eji ọkwa surfactant n'okpuru mkpokọta micelle dị oke egwu.Ọnụ ọgụgụ nke polymerization na ọdịdị ahụ na nha na-emetụta ntinye nke surfactant.A na-emepụta ọtụtụ n'ime ihe ndị ahụ na mmalite nke polymerization ma na-etolite ka okirikiri na-aga n'ihu.Enwere ike ịchịkwa ịdị arọ nke molecular na ihe mejupụtara n'ime ihe ahụ site na iji ihe na-emepụta polymerization na ọnọdụ.
Otu polymerization usoro na-eme ka aqueous dispersions nke PTFE dị ka ezi ntụ ntụ.A na-etinye mgbasa ahụ ma kwụsie ike site na iji ụdị surfactants ionic na nonionic dị iche iche.A kọwo ọtụtụ ụzọ ntinye uche gụnyere electrodecantation, evaporation, na thermal itinye uche.Ihe mgbakwunye kemịkalụ iji kwekọọ na usoro nrụpụta ma ọ bụ akụkụ ihe onwunwe chọrọ nwere ike gbanwee mgbasa PTFE ikpeazụ.
A na-emepụta ogige ndị jupụtara na ụdị atọ nke PTFE site na iji ihe ndị dị ka eriri iko, graphite, metal powder, carbon fiber, na ndị ọzọ.
Oge nzipu: Sep-24-2018