Phenol-formaldehyde lehoakhoa. Oa ho lokisetsa le tshebediso. thepa

Phenol formaldehyde lehoakhoa - le maiketsetso lehoakhoa le thepa ea thermosets kapa thermosets. halogenated joalo ke oligomeric kapa mokelikeli dintho, fumanoa ka polycondensation tsa formaldehyde le phenol ka asiti kapa alkaline seaplane (resol, novolac lehoakhoa kapa bakelite). Sena se ka ho eketsehileng ama thepa ea ho qetela sehlahiswa.

The thepa ea halogenated phenol-formaldehyde

Phenol formaldehyde lehoakhoa (moralo [-C6H3 (OH) -CH2-] n g) e na le e phahameng ea motlakase e kwahelang, ts'enyeho ntle le botsitso phetha molao feela. Ka ho phethahetseng qhibilihang ka har'a ka hydrocarbons nkhang hamonate le aliphatic, ketones le solvents ditlelorine. Ho boetse ho na le qhibilihang ka har'a ka ditharollo Polar le ea metsi a alkali tharollo. Ka mor'a ho phekola phenol-formaldehyde halogenated ba fetoloa gustosshitye polymers microheterogeneous ya sebopeho amorphous.

Moo phenol formaldehyde lehoakhoa e sebelisoa?

- ka ho hlahisa dipolasetiki: tiile lipelo lehoakhoa bitsoa resite, ile ea tiisa oli ka ho ba teng ha acid sulphonic - karbolit, ka ho ba teng ha acid e lactic - neoleykoritami;

- ka ho hlahisa lipolisheng, likhomaretsi, a maiketsetso, dibering, mekatelo Brake, libolo tsa billiards;

- ho tloha karbolit (phekola phenol-formaldehyde lehoakhoa) etsoa multimers matlo ba bang ba dikai Union;

- e boetse e le ntho e sebelisoa e le binder bakeng sa tlhahiso ea bōpa o hlophisitsoeng o ile oa tlala fillers fapaneng (phofo lehong, khalase le litlheferetsi, selulose), chipboard le fibreboard, aa tšela le impregnating hlophisitsoeng (bakeng sa faeba tlala le thepa lohiloeng bakeng sa plywood) likhomaretsi.

Phenol formaldehyde lehoakhoa: bozongisela le ekolotsi

Le formaldehyde le phenol sebelisitsoe ka tlhahisong ea halogenated phenol-formaldehyde, tse nang le chefo e le chang dintho. Formaldehyde lehoakhoa nang le tšusumetso e mpe ho 'mele oa motho: lisosa tsa eczema le dermatitis. Ho feta moo, formaldehyde boetse o na le makgetha a ho carcinogenic.  

Bakelite - tiile lipelo sehlahisoa sa lehoakhoa phenol-formaldehyde ka ho ba teng ha sethothetsi ka. taba ena ke ea bohlokoa haholo ka ho Makala a fapaneng a bophelo ba motho. Bakelite ke mokhanni e fokolang ya ea mocheso, empa hlahisa hanyetsa ntle ho tšenyo e phetha molao: makala, makala, khohlano kapa khatello. Ho le bonolo ho sebetsa ka lepolanka khethehileng. Ke kobo e molemo. The hlapolotsoeng a alkali, acid e le metsi ha ho sebetsa, ka ntle bakeng sa sulfuric khobokellane kapa acid nitric. Manganga ho likhato +300, le hlaha ka thempereichara e phahame combustion e.

Ho qalong ne a etselitsoe ho ba le ka nkang sebaka sa shellac - e lehoakhoa khethehileng hlahisoa mofuta ea tropike lacquer likokoanyana tekanyo e.

Phenolics. kopo

Phenoplast - ka polasetiki eo e fumanoa ka solidification formaldehyde halogenated ka thempereichara e phahameng hammoho le filler efe kapa efe. Hona joale, lintho tse bonahalang ena ke keng ea lekanngoa ka thepa ea eona. Sebelisa phenoplasts entsoe:

- ntho ne a rerile hore mapolanka hatisitsoeng oa potoloho - getinaks;

- ntho bakeng sa ho bōpa e mehaho lintho tse bonahalang - PCB;

- likarolo tse theko bakeng sa boto lipapali - o siame, didomino, gago ka ba;

- ba bang ba likarolo tsa disebediso kichineng: mehele bakeng sa stoves khase, kettles le lithipa, lipitsa le lipane;

- Bakelite phenol sekhomaretsi;

- motlakase lihlahisoa - sockets, lipolaka, limithara tse motlakase, fapoha, ba phetela, housings motor, mabokose mateano, matla a khoheli actuators, joalo-joalo.;

- dikarolo tsa le boenjiniere, mohlala, mehato ya escalators, boemelong ba sa tšoaneng le likotola;

- moaparo jewellery, souvenirs, dibukeng, ba bang ba dintlha tsa lihora.