Cov yas xa mus rau cov khoom siv feem ntau yog cov resins (los yog monomers polymerized ncaj qha thaum ua), ntxiv nrog cov khoom ntxiv xws li plasticizers, fillers, lubricants, thiab colorants, uas tuaj yeem ua rau cov duab thaum ua.
Cov yam ntxwv tseem ceeb ntawm Plastics:
① Feem ntau cov yas yog lub teeb yuag thiab tshuaj lom neeg ruaj khov, tiv taus corrosion.
② Kev cuam tshuam zoo heev.
③ Zoo pob tshab thiab hnav tsis kam.
④ Insulating khoom nrog thermal conductivity tsawg.
⑤ Feem ntau yooj yim rau pwm, xim, thiab txheej txheem ntawm tus nqi qis.
⑥ Feem ntau cov yas muaj cov cua sov tsis zoo, cov thermal expansion siab, thiab yog cov nplaim taws.
⑦ Dimensional instability, nquag deformation.
⑧ Muaj ntau cov yas ua rau pom kev ua haujlwm tsis zoo ntawm qhov kub thiab txias, ua nkig rau hauv qhov txias.
⑨ Ua rau muaj kev laus.
⑩ Qee cov yas yaj yooj yim hauv cov kuab tshuaj.
Phenolic resinsyog dav siv nyob rau hauv FRP (Fiber-Reinforced Plastic) daim ntawv thov uas yuav tsum tau FST (hluav taws kub, haus luam yeeb, thiab toxicity). Txawm hais tias muaj qee qhov kev txwv (tshwj xeeb tshaj yog brittleness), phenolic resins tseem yog ib pawg loj ntawm kev lag luam resins, nrog rau lub ntiaj teb txhua xyoo ntau lawm ze li ntawm 6 lab tons. Phenolic resins muaj kev ruaj ntseg zoo heev thiab tshuaj lom neeg, tswj kev ruaj ntseg hauv qhov kub ntawm 150-180 ° C. Cov khoom no, ua ke nrog lawv cov nqi-kev ua tau zoo, tsav lawv kev siv txuas ntxiv hauv FRP cov khoom. Cov ntawv thov muaj xws li cov khoom siv dav hlau sab hauv, cov khoom thauj khoom, cov tsheb ciav hlau sab hauv, cov roj av sab hauv lub platform gratings thiab cov kav dej, cov khoom siv hauv av, cov ntaub ntawv sib txhuam, foob pob hluav taws nozzle rwb thaiv tsev, thiab lwm yam khoom muaj feem xyuam nrog FST.
Hom Fiber-Reinforced Phenolic Composites
Fiber-reinforced phenolic compositessuav nrog cov khoom siv kho kom zoo nrog cov fibers tws, ntaub, thiab cov fibers txuas ntxiv. Thaum ntxov tws fibers (piv txwv li, ntoo, cellulose) tseem siv nyob rau hauv phenolic molding tebchaw rau ntau yam kev siv, tshwj xeeb tshaj yog nyob rau hauv lub tsheb qhov chaw xws li dej twj tso kua mis npog thiab kev sib txhuam Cheebtsam. Niaj hnub nimno phenolic molding tebchaw koom nrog cov iav fibers, hlau fibers, los yog ntau tshaj tsis ntev los no, carbon fibers. Cov phenolic resins siv nyob rau hauv molding tebchaw yog novolac resins, kho nrog hexamethylenetetramine.
Cov ntaub ntawv ua ntej impregnated yog siv rau ntau yam kev siv, xws li RTM (Resin Transfer Molding), honeycomb sandwich structures, ballistic protection, aircraft interior panels, and cargo liners. Cov khoom siv fiber ntau txuas ntxiv yog tsim los ntawm filament winding lossis pultrusion. Npuag thiab nruamfiber reinforced compositesFeem ntau siv dej- lossis hnyav-soluble resole phenolic resins. Tshaj li resole phenolics, lwm yam phenolic systems-xws li benzoxazines, cyanate esters, thiab cov tshiab tsim Calidur ™ resin-yog tseem ua hauj lwm hauv FRP.
Benzoxazine yog ib hom tshiab ntawm phenolic resin. Tsis zoo li cov tshuaj phenolics ib txwm muaj, qhov chaw molecular txuas ntawm methylene txuas hniav [-CH₂-], benzoxazines tsim cov qauv cyclic. Benzoxazines tau yooj yim synthesized los ntawm phenolic cov ntaub ntawv (bisphenol los yog novolac), thawj amines, thiab formaldehyde. Lawv lub nplhaib-qhib polymerization ua tsis muaj byproducts los yog volatiles, txhim kho qhov seem stability ntawm cov khoom kawg. Ntxiv rau qhov kub kub thiab nplaim taws ua haujlwm, benzoxazine resins nthuav tawm cov khoom tsis tuaj yeem nyob hauv cov tshuaj phenolics, xws li kev nqus dej tsawg thiab kev ua haujlwm ruaj khov.
Calidur ™ yog ib tiam tom ntej, ib leeg-khoom, chav-kub-ruaj khov polyarylether amide thermosetting resin tsim los ntawm Evonik Degussa rau kev lag luam aerospace thiab electronics. Cov tshuaj no kho tau ntawm 140 ° C hauv 2 teev, nrog lub iav hloov pauv kub (Tg) ntawm 195 ° C. Tam sim no, Calidur ™ ua kom pom ntau qhov zoo rau cov khoom siv ua haujlwm siab: tsis muaj kev cuam tshuam tsis zoo, cov tshuaj tiv thaiv exothermic thiab shrinkage thaum kho, siab thermal thiab ntub lub zog, superior composite compression thiab shear zog, thiab zoo heev toughness. Qhov kev hloov tshiab no ua haujlwm zoo rau kev siv nyiaj nruab nrab-rau-siab-Tg epoxy, bismaleimide, thiab cyanate ester resins hauv aerospace, tsheb thauj mus los, tsheb, hluav taws xob / hluav taws xob, thiab lwm yam kev thov.
Post lub sij hawm: Jun-24-2025
