Phenolic Resin

I-phenolic resin nayo ibizwa ngokubabakelite, ekwabizwa ngokuba yi-bakelite powder.Ekuqaleni yayingenambala (emhlophe) okanye i-yellowish-brown transparent, imarike ihlala yongeza i-agent enemibala ukuze ibonakale ibomvu, iphuzi, imnyama, iluhlaza, imdaka, ibhlowu kunye neminye imibala, kwaye i-granular kunye nomgubo.Ukumelana ne-asidi ebuthathaka kunye ne-alkali ebuthathaka, iya kubola xa kukho i-asidi eyomeleleyo kwaye i-corrode kwimeko yealkali eyomeleleyo.Inyibilika kwi-acetone, amanzi, utywala kunye nezinye izinyibilikisi eziphilayo.Ifunyenwe nge-polycondensation ye-phenolic aldehyde okanye i-derivatives yayo.I-solid phenolic resin yinto etyheli, ebonakalayo, i-amorphous blocky substance, ebomvu ngenxa ye-phenol yamahhala, i-avareji yobunzima obuthile bequmrhu malunga ne-1.7, i-soluble kalula etywaleni, ayinyibiliki emanzini, izinzile emanzini, i-asidi ebuthakathaka kunye nesisombululo se-alkali esibuthathaka.I-resin eyenziwe yi-polycondensation ye-phenol kunye ne-formaldehyde phantsi kweemeko ze-catalyst, i-neutralization kunye nokuhlamba ngamanzi.Ngenxa yokukhethwa kwe-catalyst, inokwahlulwa ibe ziindidi ezimbini: i-thermosetting kunye ne-thermoplastic.I-Phenolic resin inokumelana ne-asidi elungileyo, iipropathi zoomatshini kunye nokumelana nobushushu, kwaye isetyenziswa kakhulu kubunjineli bokuchasana nomhlwa, izinto zokuncamathelisa, izinto ezibuyiswa ngamadangatye, ukwenziwa kwevili lokusila kunye namanye amashishini.

I-Phenolic resin powder luhlobo lwe-thermoplastic phenolic resin eyenziwe yi-polycondensation ye-phenol kunye ne-formaldehyde kwi-acidic medium.Inokuchithwa kwi-ethanol kwaye ibe yi-thermosetting ngokudibanisa i-6-15% ye-urotropine.Inokubunjwa kwi-150°C kwaye unamandla athile oomatshini.kunye neempawu zokugquma umbane.

Eyona nto iphambili ye-phenolic resin kukumelana nobushushu obuphezulu, kwaye inokugcina ingqibelelo yesakhiwo kunye nokuzinza komda kwakwiqondo lobushushu eliphezulu kakhulu.Ke ngoko, i-phenolic resins isetyenziswa kumasimi obushushu obuphezulu, njengezinto eziphikisayo, izinto zokukhuhlana, izinto zokuncamathelisa kunye namashishini e-Foundry.

Ukusetyenziswa okubalulekileyo kwe-phenolic resin kufana ne-binder.I-Phenolic resins iguquguquka kwaye iyahambelana neentlobo ezininzi zezinto eziphilayo kunye nezizalisi ezingaphili.Ii-phenolic resins eziyilwe ngokufanelekileyo zimanzisa ngokukhawuleza okukhulu.Kwaye emva kwe-cross-linking, inokubonelela ngamandla afunekayo omatshini, ukuxhathisa ukushisa kunye neempawu zombane zezixhobo ezinqabileyo, izinto eziphikisayo, izinto zokukhuhla kunye ne-bakelite.

Iiresin zephenolic ezinyibilikayo ngamanzi okanye i-alcohol-soluble phenolic resins zisetyenziselwa ukufaka iphepha, ilaphu lomqhaphu, iglasi, iasbestos kunye nezinye izinto ezifanayo ukuze zibonelele amandla omatshini, iimpawu zombane, njl njl. iidiski kunye nephepha lokucoca ukucoca iimoto.

Iimpawu ze-phenolic resin:

Ukusebenza kobushushu obuphezulu: Eyona nto ibalulekileyo ye-phenolic resin kukumelana nobushushu obuphezulu, nokuba ngamaqondo obushushu aphezulu kakhulu, inokugcina ingqibelelo yesakhiwo kunye nokuzinza komda.

Amandla ebhondi: Ukusetyenziswa okubalulekileyo kwe-phenolic resin kufana nesibophelelo.I-Phenolic resins iguquguquka kwaye iyahambelana neentlobo ezininzi zezinto eziphilayo kunye nezizalisi ezingaphili.

Izinga eliphezulu lokushiyeka kwekhabhoni: Ngaphantsi kweemeko zegesi engasebenziyo kunye nobushushu obumalunga ne-1000°C, i-phenolic resins iya kuvelisa ii-residues zekhabhoni eziphezulu, ezilungele ukugcina ukuzinza kwesakhiwo se-phenolic resins.

Umsi ophantsi kunye netyhefu ephantsi: Xa kuthelekiswa nezinye iinkqubo ze-resin, inkqubo ye-phenolic resin inenzuzo yomsi ophantsi kunye netyhefu ephantsi.Kwimeko yokutsha, inkqubo ye-phenolic resin eveliswa yifomula yesayensi iya kubola ngokukhawuleza ukuvelisa i-hydrogen, i-hydrocarbons, umphunga wamanzi kunye ne-carbon oxides.Umsi oveliswa ngexesha lokubola uncinci, kwaye ubuthi buncinci.

Ukumelana nemichiza: I-resin edibeneyo ye-phenolic iyakwazi ukuxhathisa ukubola kwayo nayiphi na imichiza.Njengepetroli, i-petroleum, utywala, i-glycol, igrisi kunye nee-hydrocarbons ezahlukeneyo.

Ukunyangwa kobushushu: Ukunyangwa kobushushu kuya kwandisa iqondo lokushisa leglasi ye-resin ephilileyo, enokuphucula ngakumbi iipropati ze-resin.

Ukuba namagwebu: I-Phenolic foam luhlobo lweplastiki yogwebu efunyenwe nge-phenolic resin enegwebu.Xa kuthelekiswa ne-polystyrene foam, i-polyvinyl chloride foam, i-polyurethane foam kunye nezinye izinto ezilawula imarike kwinqanaba lokuqala, inomsebenzi obalaseleyo obalaseleyo ngokubhekiselele kwi-flame retardancy.