Pulasitiki imatanthawuza kuzinthu zomwe zimapangidwa ndi utomoni (kapena ma monomers opangidwa ndi polymer mwachindunji panthawi yokonza), zowonjezeredwa ndi zowonjezera monga mapulasitiki, zodzaza, mafuta odzola, ndi ma colorants, omwe amatha kupangidwa kuti apangidwe pokonza.
Zofunikira Zapulasitiki:
① Mapulasitiki ambiri ndi opepuka komanso osasunthika, osachita dzimbiri.
② Kukantha kwabwino kwambiri.
③ Kuwonekera bwino komanso kukana kuvala.
④ Kuteteza katundu ndi otsika matenthedwe madutsidwe.
⑤ Nthawi zambiri yosavuta kuumba, mtundu, ndi kukonza pamtengo wotsika.
⑥ Mapulasitiki ambiri sakhala ndi kutentha kosakwanira, amawonjezera kutentha, ndipo amatha kuyaka.
⑦ Kusakhazikika kwa dimensional, kumakonda kusinthika.
⑧ Mapulasitiki ambiri amawonetsa kusagwira bwino kwa kutentha, kukhala osalimba m'malo ozizira.
⑨ Amatha kukalamba.
⑩ Mapulasitiki ena amasungunuka mosavuta mu zosungunulira.
Phenolic resinsamagwiritsidwa ntchito kwambiri mu FRP (Fiber-Reinforced Plastic) zomwe zimafuna FST (Moto, Utsi, ndi Toxicity) katundu. Ngakhale pali zolephera zina (makamaka brittleness), ma phenolic resins amakhalabe gulu lalikulu la utomoni wamalonda, ndikupanga padziko lonse lapansi pafupifupi matani 6 miliyoni. Phenolic resins imapereka kukhazikika kwapamwamba kwambiri komanso kukana kwamankhwala, kusunga bata mkati mwa kutentha kwa 150-180 ° C. Katunduwa, kuphatikiza ndi mwayi wawo wogwiritsa ntchito mtengo, amayendetsa ntchito yawo kupitilizabe muzinthu za FRP. Ntchito zodziwika bwino zimaphatikizapo zida zamkati mwandege, zotengera zonyamula katundu, zamkati zamagalimoto a njanji, zopangira mafuta akunyanja ndi mapaipi, zida zamsewu, zida zogundana, kutsekereza rocket nozzle, ndi zinthu zina zokhudzana ndi FST.
Mitundu ya Fiber-Reinforced Phenolic Composites
Fiber-reinforced phenolic compositesphatikizani zinthu zopangidwa ndi ulusi wodulidwa, nsalu, ndi ulusi wosalekeza. Ulusi wodulidwa koyambirira (mwachitsanzo, matabwa, mapadi) amagwiritsidwabe ntchito popanga ma phenolic popanga zinthu zosiyanasiyana, makamaka zida zamagalimoto monga zovundikira pampu yamadzi ndi zida zogundana. Mankhwala amakono a phenolic amaphatikizapo ulusi wagalasi, ulusi wazitsulo, kapena posachedwapa, ulusi wa carbon. Ma resins a phenolic omwe amagwiritsidwa ntchito popanga zinthu ndi ma novolac resins, ochiritsidwa ndi hexamethylenetetramine.
Zida zansalu zomwe zimayikidwa kale zimagwiritsidwa ntchito mosiyanasiyana, monga RTM (Resin Transfer Molding), masangweji a uchi, chitetezo champhamvu, mapanelo amkati mwa ndege, ndi zotengera zonyamula katundu. Zopangidwa mosalekeza zokhala ndi ulusi wokhazikika zimapangidwa kudzera pa ma filament winding kapena pultrusion. Nsalu ndi mosalekezafiber-reinforced kompositiNthawi zambiri amagwiritsa ntchito madzi kapena zosungunulira zosungunuka za phenolic resins. Kupitilira ma resole phenolics, machitidwe ena okhudzana ndi phenolic-monga ma benzoxazines, ma cyanate esters, ndi utomoni watsopano wa Calidur™ amagwiritsidwanso ntchito mu FRP.
Benzoxazine ndi mtundu watsopano wa phenolic resin. Mosiyana ndi ma phenolics achikhalidwe, pomwe magawo a maselo amalumikizidwa kudzera pamilatho ya methylene [-CH₂-], ma benzoxazines amapanga mawonekedwe ozungulira. Benzoxazines amapangidwa mosavuta kuchokera ku zinthu za phenolic (bisphenol kapena novolac), ma amine oyambirira, ndi formaldehyde. Polymerization yawo yotsegulira mphete simapanga zopangira kapena zosinthika, zomwe zimakulitsa kukhazikika kwa chinthu chomaliza. Kuphatikiza pa kutentha kwakukulu ndi kukana kwa malawi, ma benzoxazine resins amawonetsa zinthu zomwe sizipezeka mu phenolics zachikhalidwe, monga kuyamwa kochepa kwa chinyezi komanso magwiridwe antchito okhazikika a dielectric.
Calidur™ ndi m'badwo wotsatira, wagawo limodzi, wokhazikika m'chipinda chokhala ndi polyarylether amide thermosetting resin wopangidwa ndi Evonik Degussa kwa mafakitale azamlengalenga ndi zamagetsi. Thisresin amachiritsa pa 140 ° C mu maola awiri, ndi kutentha kwa galasi (Tg) kwa 195 ° C. Pakadali pano, Calidur ™ ikuwonetsa zabwino zambiri zamapangidwe apamwamba kwambiri: palibe kutulutsa kosasunthika, kutsika kwamphamvu kwapang'onopang'ono komanso kuchepa pakuchiritsa, kutenthetsa kwambiri komanso kunyowa kwamphamvu, kuphatikizika kophatikizana kwakukulu ndi kumeta ubweya, komanso kulimba mtima kwambiri. Utoto wopangidwa mwatsopanowu umagwira ntchito ngati njira yotsika mtengo kuposa yapakati mpaka-pamwamba-Tg epoxy, bismaleimide, ndi utomoni wa cyanate ester muzamlengalenga, zoyendera, zamagalimoto, zamagetsi / zamagetsi, ndi ntchito zina zovuta.
Nthawi yotumiza: Jun-24-2025
