Phenolic Resin

Phenolic resin amatchedwansobakelite, wotchedwanso ufa wa bakelite.Poyambirira zinthu zopanda mtundu (zoyera) kapena zachikasu-bulauni zowonekera, msika nthawi zambiri umawonjezera zopangira utoto kuti ziwoneke zofiira, zachikasu, zakuda, zobiriwira, zofiirira, zabuluu ndi mitundu ina, ndipo ndi granular ndi powdery.Kugonjetsedwa ndi asidi ofooka ndi alkali wofooka, amawola ngati ali ndi asidi amphamvu ndi corrode ngati ali amphamvu alkali.Kusungunuka mu acetone, madzi, mowa ndi zina zosungunulira organic.Amapezeka ndi polycondensation ya phenolic aldehyde kapena zotumphukira zake.Olimba phenolic utomoni ndi chikasu, mandala, amorphous blocky mankhwala, pabuka chifukwa cha phenol ufulu, pafupifupi yeniyeni mphamvu yokoka wa gulu ndi za 1.7, mosavuta sungunuka mowa, insoluble m'madzi, khola madzi, ofooka asidi ndi ofooka alkali njira.Ndi utomoni wopangidwa ndi polycondensation wa phenol ndi formaldehyde pansi pa zinthu zothandizira, neutralization ndi kutsuka ndi madzi.Chifukwa cha kusankha chothandizira, chikhoza kugawidwa m'magulu awiri: thermosetting ndi thermoplastic.Phenolic resin imakhala ndi kukana kwa asidi wabwino, makina amakina komanso kukana kutentha, ndipo imagwiritsidwa ntchito kwambiri muumisiri wotsutsana ndi dzimbiri, zomatira, zoziziritsa kumoto, kupanga magudumu akupera ndi mafakitale ena.

Phenolic resin ufa ndi mtundu wa thermoplastic phenolic resin wopangidwa ndi polycondensation wa phenol ndi formaldehyde mu acidic sing'anga.Ikhoza kusungunuka mu Mowa ndikukhala thermosetting powonjezera 6-15% urotropine.Ikhoza kupangidwa pa 150°C ndipo ali ndi mphamvu zamakina.ndi mphamvu zoteteza magetsi.

Mbali yaikulu ya phenolic resin ndi kukana kutentha kwambiri, ndipo imatha kusunga umphumphu wake ndi kukhazikika kwake ngakhale pa kutentha kwambiri.Chifukwa chake, ma resins a phenolic amagwiritsidwa ntchito m'magawo otentha kwambiri, monga zida zomangira, zida zomangira, zomatira ndi mafakitale oyambira.

Ntchito yofunika kwambiri ya phenolic resin imakhala ngati chomangira.Phenolic resins ndi yosunthika komanso yogwirizana ndi mitundu yosiyanasiyana ya organic ndi inorganic fillers.Zopangidwa bwino za phenolic resins zimanyowa mwachangu kwambiri.Ndipo pambuyo mtanda kulumikiza, akhoza kupereka chofunika makina mphamvu, kutentha kukana ndi katundu magetsi kwa zida abrasive, zipangizo refractory, zipangizo mikangano ndi bakelite.

Madzi osungunuka a phenolic resins kapena mowa-soluble phenolic resins amagwiritsidwa ntchito popangira mapepala, nsalu za thonje, galasi, asibesitosi ndi zinthu zina zofanana kuti awapatse mphamvu zamakina, mphamvu zamagetsi, ndi zina zotero. zimbale ndi fyuluta pepala zosefera magalimoto.

Phenolic resin katundu:

Kuchita kwa kutentha kwakukulu: Chinthu chofunika kwambiri cha phenolic resin ndi kukana kutentha kwapamwamba, ngakhale kutentha kwambiri, kumatha kusunga umphumphu wake ndi kukhazikika kwake.

Mphamvu ya mgwirizano: Kugwiritsa ntchito kofunikira kwa phenolic resin kumakhala ngati chomangira.Phenolic resins ndi yosunthika komanso yogwirizana ndi mitundu yosiyanasiyana ya organic ndi inorganic fillers.

Mpweya wotsalira wa carbon: Pansi pa mpweya wa mpweya wokhala ndi kutentha pafupifupi 1000°C, ma phenolic resins adzatulutsa zotsalira za kaboni zambiri, zomwe zimathandiza kuti pakhale bata la phenolic resins.

Utsi wochepa komanso kawopsedwe kakang'ono: Poyerekeza ndi machitidwe ena a utomoni, phenolic resin system ili ndi ubwino wa utsi wochepa komanso kawopsedwe kakang'ono.Pankhani ya kuyaka, phenolic resin system yopangidwa ndi sayansi yasayansi imawola pang'onopang'ono kuti ipange haidrojeni, ma hydrocarbon, mpweya wamadzi ndi ma carbon oxides.Utsi wopangidwa panthawi ya kuwonongeka ndi wochepa, ndipo kawopsedwe kake kamakhala kochepa.

Kukana kwa Chemical: Cross-linked phenolic resin imatha kukana kuwonongeka kwa mankhwala aliwonse.Monga mafuta, mafuta, mowa, glycol, mafuta ndi ma hydrocarbons osiyanasiyana.

Chithandizo cha kutentha: Kuchiza kutentha kumawonjezera kutentha kwa galasi la utomoni wochiritsidwa, zomwe zingathe kupititsa patsogolo mphamvu za utomoni.

Kutulutsa thovu: Phenolic thovu ndi mtundu wa pulasitiki thovu wopezedwa ndi thovu phenolic utomoni.Poyerekeza ndi thovu la polystyrene, thovu la polyvinyl chloride, thovu la polyurethane ndi zida zina zomwe zidalamulira msika koyambirira, ili ndi magwiridwe antchito apadera potengera kuchedwa kwamoto.