Iiplastiki zibhekisa kwizinto ezenziwe ngokuyintloko ngeentlaka (okanye ii-monomers ezenziwe nge-polymers ngokuthe ngqo ngexesha lokusetyenzwa), zongezwa ngezengezo ezinje ngeplastiki, izihluzi, izinto zokuthambisa, kunye nemibala enokubunjwa ukuba ibunjwe ngexesha lokusetyenzwa.
Iimpawu eziphambili zePlastiki:
① Uninzi lweeplastiki zikhaphukhaphu kwaye zizinzile ngokwekhemikhali, ziyamelana nokubola.
② Ukuchasana kwempembelelo egqwesileyo.
③ Ukungafihli kakuhle kunye nokumelana nokunxiba.
④ Iipropati ezikhuselayo ezine-conductivity ephantsi ye-thermal.
⑤ Ngokuqhelekileyo kulula ukubumba, umbala, kunye nokusebenza ngexabiso eliphantsi.
⑥ Iiplastiki ezininzi azikwazi ukumelana nobushushu, ukwanda kwe-thermal ephezulu, kwaye ziyatsha.
⑦ Ukungazinzi komgangatho, ulungele ukuguqulwa.
⑧ Iiplastiki ezininzi zibonisa ukusebenza kakubi kobushushu obuphantsi, ziba brittle kwiimeko ezibandayo.
⑨ Ukwaluphala ngokulula.
⑩ Ezinye iiplastiki zinyibilika ngokulula kwizinyibilikisi.
Phenolic resinszisetyenziswa ngokubanzi kwi-FRP (i-Fiber-Reinforced Plastic) izicelo ezifuna iipropati ze-FST (Umlilo, uMsi, kunye ne-Toxicity). Ngaphandle kwemida ethile (ingakumbi i-brittleness), ii-phenolic resins zihlala ziluhlu oluphambili lwee-resin zorhwebo, kunye nemveliso yonyaka yehlabathi malunga neetoni ezizigidi ezi-6. Ii-phenolic resins zibonelela ngokugqwesileyo kozinzo lwe-dimensional kunye nokumelana neekhemikhali, zigcina uzinzo ngaphakathi koluhlu lobushushu lwe-150-180 ° C. Ezi zakhiwo, zidibaniswe nenzuzo yazo yokusebenza kweendleko, ziqhuba ukusetyenziswa kwazo okuqhubekayo kwiimveliso ze-FRP. Usetyenziso oluqhelekileyo lubandakanya iinxalenye zangaphakathi zenqwelomoya, iilayini zemithwalo, izithuthi zikaloliwe zangaphakathi, iplatifti ye-oyile ekude nonxweme kunye nemibhobho, imathiriyeli yetonela, imathiriyeli yokukhuhlana, ukugqunywa kwemibhobho yerokethi, kunye nezinye iimveliso ezinxulumene ne-FST.
Iindidi zeFiber-Reinforced Phenolic Composites
Iingxube ze-phenolic eziqiniswe ngefayibhaziquka imathiriyeli eyomelezwe ngeentsinga ezinqunqiweyo, amalaphu, kunye neentsinga eziqhubekayo. Iintsinga ezinqunqiweyo zakwangoko (umzekelo, iinkuni, iselulosi) zisasetyenziswa kwikhompawundi zokubumba i-phenolic kwizicelo ezahlukeneyo, ngakumbi iinxalenye zemoto ezifana nezigqumathelo zempompo zamanzi kunye nezixhobo zokukhuhlana. Iikhompawundi zokubumba ze-phenolic zanamhlanje zibandakanya iifayili zeglasi, iifayili zetsimbi, okanye kutshanje, iifayili zekhabhoni. I-phenolic resins ezisetyenziselwa ukubumba iikhompawundi ziyi-novolac resins, zinyangwa nge-hexamethylenetetramine.
Izixhobo zelaphu ezifakwe ngaphambili zisetyenziswe kwizicelo ezahlukeneyo, ezifana ne-RTM (i-Resin Transfer Molding), izakhiwo ze-sandwich ye-honeycomb, ukukhusela i-ballistic, iipaneli zangaphakathi zeenqwelo-moya, kunye neenqwelo zempahla. Iimveliso eziqhubekayo zefayibha zenziwe nge-filament winding okanye i-pultrusion. Ilaphu kunye nokuqhubekayoimihlanganisela eyomelezwe yifiberngokuqhelekileyo zisebenzisa amanzi- okanye i-solvent-soluble resole phenolic resins. Ngaphandle kwe-resole phenolics, ezinye iinkqubo ezinxulumene ne-phenolic-ezifana ne-benzoxazines, i-cyanate esters, kunye ne-Calidur™ resin esanda kuphuhliswa-zikwasetyenziswa kwi-FRP.
I-Benzoxazine luhlobo lwenoveli ye-phenolic resin. Ngokungafani ne-phenolics yendabuko, apho amacandelo e-molecular adibaniswa ngeebhulorho ze-methylene [-CH₂-], i-benzoxazines yenza isakhiwo se-cyclic. I-Benzoxazines yenziwe ngokulula kwizinto ze-phenolic (i-bisphenol okanye i-novolac), ii-amine eziphambili, kunye ne-formaldehyde. I-polymerization yabo yokuvula ikhonkco ayivelisi mveliso okanye i-volatiles, iphucula ukuzinza komgangatho wemveliso yokugqibela. Ukongeza kubushushu obuphezulu kunye nokumelana nomlilo, i-benzoxazine resins ibonisa iipropati ezingekho kwi-phenolics zendabuko, ezifana nokufunxa okuphantsi komswakama kunye nokusebenza okuzinzile kwe-dielectric.
I-Calidur™ sisizukulwana esilandelayo, icandelo elinye, ubushushu begumbi-ezinzile i-polyarylether amide thermosetting resin ephuhliswe ngu-Evonik Degussa kwimizi-mveliso ye-aerospace neye-elektroniki. Le resin iphilisa kwi-140 ° C kwiiyure ze-2, kunye nobushushu beglasi benguqu (Tg) ye-195 ° C. Okwangoku, iCalidur™ ibonisa izinto ezininzi eziluncedo kwimihlanganisela yokusebenza okuphezulu: akukho kukhutshwa okuguquguqukayo, ukusabela okuphantsi kwe-exothermic kunye nokushwabana ngexesha lokunyanga, amandla aphezulu ashushu kunye nokumanzi, ucinezelo oluphezulu lwe-composite kunye namandla okucheba, kunye nokuqina okugqwesileyo. Le resin entsha isebenza njengenye indlela engabizi kakhulu kwi-middle-to-high-Tg epoxy, i-bismaleimide, kunye ne-cyanate ester resins kwi-aerospace, ukuthutha, i-automotive, umbane / i-electronics, kunye nezinye izicelo ezifunekayo.
Ixesha lokuposa: Jun-24-2025
