Umugqa Wokunwetshwa Kwepulasitiki mayelana Nezinto Ezingavuthiwe: Izakhiwo Nokusetshenziswa Kwe-High Performance Polyphenylene Sulfide PPS Resin

Umugqa Wokunwetshwa Kwepulasitikimayelana nezinto ezingavuthiwe
I-Polyphenylene sulfide uhlobo olusha lwepulasitiki yobunjiniyela obusebenzayo. Ama-molecule ayo aqukethe amayunithi esakhiwo aphindaphindayo e-p-phenylene sulfide, kanti uchungechunge oluyinhloko lwe-molecule luqukethe i-phenylene sulfide. Isisindo sayo sama-molecule singu-10,000 ~ 50,000. I-Polyphenylene sulfide iyi-polymer eqondile noma enamagatsha engenawo iphuzu lokuncibilika kwekristalu. Iyisakhiwo esiqondile ngaphambi kokuxhumanisa kanye nesakhiwo se-thermosetting ngemuva kokuxhumanisa. Ingathanjiswa ngezinga elithile uma ishiswa ngokuphelele futhi ipholisiwe.


I-Polyphenylene sulfide i-polycondensed kusuka ku-sodium sulfide kanye ne-dichlorobenzene ku-solvent enamandla ye-polar. Izindlela zokukhiqiza zifaka phakathi indlela kaMichael, indlela ye-p-halogenated thiophenate self-condensation, i-aromatic polyhalide kanye ne-alkali metal sulfide solution polycondensation, njll.

Ubuningi obuhlobene be-polyphenylene sulfide bungu-1.36, kanti i-resin iyimpuphu emhlophe noma ama-granule, iqinile futhi iyaphuka, ine-crystallinity ephezulu kanye ne-viscosity eqinile yokuncibilika. I-Polyphenylene sulfide inezinhlobo ezimbili zesisindo sama-molecule, isisindo sama-molecule esiphansi kanye nesisindo sama-molecule esiphezulu. Ngenxa yenani eliphezulu lokugeleza kokuncibilika, kunzima ukuyibumba ngqo, ngakho-ke ngaphezu kokufutha, ezinye izindlela kumele zidlule ezingeni elithile lokuxhumanisa ngesikhathi sokubumba, futhi inani elithile le-fiber yengilazi noma i-resin engakhiqizi yokubumba umjovo, ukubumba kanye nokubumba kwe-extrusion kumele kuxutshwe. I-polyphenylene sulfide enesisindo sama-molecule esiphezulu ayidingi ukuxhunywa futhi ingasetshenziswa ngqo ekucutshungulweni kwemikhiqizo yepulasitiki.



I-PPS inomgogodla oqinile olinganayo futhi iyingxenye ye-polymer ekristalu eyakhiwe ngamasongo e-benzene aphindaphindwayo kanye nama-athomu esibabule. I-PPS iyipulasitiki ekhethekile yobunjiniyela enekhono eliphezulu kanye nephuzu lokuncibilika eliphakeme elifika ku-280 °C elingathatha indawo yezinsimbi. Itholakala phezulu kwephiramidi yokusebenza kwe-polymer, njengoba kuboniswe kuMfanekiso 1. Ngenxa yalesi sizathu, ngokusekelwe ekusebenzeni okuhle kakhulu kwe-resin ye-PPS, ihlangabezana nezidingo zezinto zokwakha zamaphrojekthi epulasitiki obunjiniyela adingayo.



1. Izici ze-polyphenylene sulfide resin esebenza kahle kakhulu
(1) I-resin ye-PPS esebenza kahle kakhulu iyi-polymer ekristalu enobulukhuni obuphezulu. Okuqukethwe kwayo kwekristalu kungama-65%. Isivinini esisheshayo sokwenza ikristalu, ukugeleza okuhle kanye nomjikelezo omfushane wokubumba.

(2) Ukumelana nokushisa okuhle kakhulu. Iphuzu layo lokuncibilika lingafinyelela ku-275~291°C, izinga lokushisa lokuphambuka kokushisa lingu-135°C, kanti izinga lokushisa lokuphambuka kokushisa ngemva kokuqinisa ifayibha yengilazi lingafinyelela ku-260°C. Emoyeni nase-nitrogen, izinga lokushisa lokuqala nelibuthakathaka le-polyphenylene sulfide lingaba ngu-400°C, liyabola emoyeni ku-700°C, futhi lisakwazi ukugcina u-40% wesisindo salo kugesi engasebenzi ku-1000°C. Izinga lokushisa lokusetshenziswa kwesikhathi eside lingu-200~240°C, kanti ukumelana nokushisa kwesithiyo segesi kanye nokuzinza kokushisa okuqhubekayo kokusetshenziswa isikhathi eside kuphakeme kunawo wonke amapulasitiki obunjiniyela amanje.

(3) Inezakhiwo ezinhle zomshini. Inokuqina okuphezulu kakhulu, ubulukhuni obuphezulu bomphezulu, ukuncipha okuncane kokuqina ngaphansi kwezimo zomswakama ophezulu, futhi inokumelana okuhle kakhulu kokukhukhuleka, ukumelana nokukhathala kanye nokumelana nokuguguleka. Ukumelana kwayo nokuguguleka kungathuthukiswa ngokugcwalisa izinto zokugcoba ezifana ne-fluororesin ne-carbon fiber. Futhi ithuthukiswe kakhulu.

(4)Inokumelana okuhle kakhulu nokugqwala kanye nokumelana namakhemikhali. Ngaphezu kwama-asidi aqinile okuxosha (njenge-sulfuric acid egxilile, i-nitric acid, njll.), ingamelana nokugqwala kwamanye ama-asidi, ama-alkali kanye nosawoti, futhi ayincibiliki kunoma yisiphi isinyibilikisi sezinto eziphilayo esingaphansi kwama-200 ° C. Ukumelana kwayo nokugqwala kucishe kufane nokwe-polytetrafluoroethylene. Ngaphezu kwalokho, i-PPS nayo inokumelana nesimo sezulu esihle kanye nemisebe, futhi ukusebenza kwayo ngeke kuthinteke yimisebe eminingi enamandla ye-ultraviolet kanye ne-gamma-ray kanye nemisebe ye-neutron.

(5) Inesilinganiso esincane sokumuncwa kwamanzi (0.008%) kanye nesilinganiso sokumuncwa kwamafutha. Ukuncipha okuncane kokubumba kanye ne-coefficient yokwanda okuqondile, umkhiqizo unezilinganiso ezizinzile kanye nokuguquguquka okuncane, futhi usengagcina ukuzinza kobukhulu ngisho nasezindaweni ezithile zegesi ezinomswakama, ezinamafutha nezingcolisayo, ngakho-ke ungasetshenziswa ekubumbeni okunembile.

(6) Izakhiwo zikagesi ezinhle kakhulu. I-resin ye-PPS esebenza kahle kakhulu inoshintsho oluncane ekumelaneni nomthamo ngaphansi kokushisa okuphezulu kanye nomswakama ophezulu, futhi ukungaguquguquki kwayo kwe-dielectric kushintsha kancane ngokushisa kanye nemvamisa. Ngaphezu kwalokho, okuqukethwe kokungcola kwe-ion kuphansi, futhi ingacwiliswa ebhavini le-solder ku-260 ° C, ukuze ikwazi ukumelana nokushiswa kobuso Ukushaqeka kokushisa kwezingxenye ze-elekthronikhi, okufanele imikhiqizo enezidingo eziphezulu kakhulu ekusebenzeni kukagesi. Inokumelana okuphezulu kanye nezakhiwo ze-dielectric eziphansi.

(7) I-resin ye-PPS esebenza kahle kakhulu inobuthi obuncibilikayo obuphansi kakhulu kanye nokugeleza okuhle. Kulula ukuyimanzisa futhi ithintane ne-fiber yengilazi, ngakho kulula ukuyigcwalisa. I-pellet yokubumba umjovo eqinisiwe ye-fiber yengilazi noma i-fiber-inorganic filler elungiselelwe yiyo inokumelana okuphezulu komthelela, ukumelana nokugoba kanye nokuqina.

(8) I-resin ye-PPS esebenza kahle inamandla aphezulu okubopha engilazini, i-aluminium, insimbi engagqwali, njll. Amandla okubopha engilazini makhulu kakhulu kunawengilazini.