Phenol-formaldehyde resin. I le sauniuniga ma le faaaogaina. meatotino

resin formaldehyde Phenol - a resin gaosi ai o meatotino a thermosets po thermosets. O resins o mea oligomeric po o le suavai, maua e polycondensation o formaldehyde ma phenol i se auala acidic po alkaline (resol, novolac resin po bakelite). O lenei toe aafia ai le meatotino oloa mulimuli.

Le meatotino a resins phenol-formaldehyde

resin formaldehyde Phenol (fua [-C6H3 (Oi) -CH2-] n) ei ai se faʻaʻesega maualuga eletise, lelei corrosion ma le mautu masini. Atoatoa soluble i hydrocarbons o ituaiga laau manogi ma aliphatic, ketones ma solvents chlorinated. O foi soluble i polar fofo ma fofo alkali aqueous. Ina ua uma ona faamalolo resins phenol-formaldehyde ua liua i gustosshitye polymers microheterogeneous o fausaga amorphous.

Afai ua faaaogāina le resin formaldehyde phenol?

- i le tuuina atu o uga: resin faamaaa taʻua resite, faamautuina suauu i le afioaga o acids sulphonic - karbolit, i le afioaga o le acid lactic - neoleykoritami;

- i le tuuina atu o varnishes, adhesives, gaosi, itūlagi, moa tofitofi, polo mo piliati;

- mai karbolit (faamālōlōina resin phenol-formaldehyde) gaosia fale multimers nisi faataitaiga Soviet;

- foi le mea faaaogaina o se faila mo le tuuina atu o fatuga faatumulia faaleleia ma tau ina faaaoga eseese (laau falaoamata, alava tioata, cellulose), chipboard ma fibreboard, ua liligi ma impregnating fatuga (mo faatumulia alava ma lalagaina mea mo plywood) adhesives.

resin formaldehyde Phenol: mauaina ma siʻosiʻomaga

Ma formaldehyde ma phenol faaaoga i le gaosia o resins phenol-formaldehyde, o vailaau oona ma mu gofie. Formaldehyde resin ua i ai se aafiaga le lelei i le tino o le tagata: mafuaaga o eczema ma dermatitis. Gata i lea, formaldehyde foi meatotino carcinogenic.  

Bakelite - faamaaa o oloa o phenol-formaldehyde resin i le afioaga o se vaega taua. O lenei mataupu e taua tele i le lalolagi i le eseese o le ola o le tagata. Bakelite o se avetaavale matitiva o le vevela, ae faaalia tetee lelei e faaleagaina masini: teʻi, teʻi, eseesega po o uunaiga. Faigofie e galulue i luga o se lathe faapitoa. O se insulator lelei. O le faavaivaia alkali, acid ma le vai e le talosaga, ae vagana ai mo faasagatonu sulfuric po acids nitric. E tetee atu +300 tikeri, o loo tupu i le vevela combustion maualuga.

O na uluai fuafuaina e avea o se suitulaga mo shellac - a resin faapitoa gaosia i le natura iniseti fua lacquer teropika.

Phenolics. talosaga

Phenoplast - o se palasitika ua maua e solidification resins formaldehyde i le vevela maualuga i le tuufaatasiga ma so o se filler. Le taimi nei, e lē mafaatusalia i mea nei i lona meatotino. ua faia le faaaogaina phenoplasts:

- mea faamoemoe mo laupapa matagaluega lomia - getinaks;

- o se mea mo le foafoaina o se mea fausaga - PCB;

- elemene taugofie mo taaloga laupapa - mu, maa tomino, mu;

- o nisi elemene o faaopoopoga umukuka: 'au mo le ogaumu kesi, kettles ma naifi, ulo ma apa;

- kelu phenolic Bakelite;

- oloa eletise - lago, plugs, mita eletise, switches, relays, housings afi eletise, pusa fuafua, actuators maneta, etc.

- vaega mo inisinia, f.t.t., laasaga o le escalators, eseese tuta ma knobs;

- teuga auro, souvenirs, pepa, o nisi auiliiliga o itula.