Phenol-formaldehyde guduro. A shirye-shiryen da kuma amfani. Properties

Phenol formaldehyde guduro - wani roba guduro ciwon Properties na thermosets ko thermosets. Irin wannan resins ne oligomeric ko ruwa abubuwa, samu da polycondensation na formaldehyde da phenol a wani acidic ko alkaline matsakaici (resol, novolac guduro ko bakelite). Wannan kara rinjayar da karshe samfurin Properties.

A Properties na phenol-formaldehyde resins

Phenol formaldehyde guduro (dabara [-C6H3 (OH) -CH2-] n) yana da babban lantarki rufi, mai kyau lalata da kuma inji kwanciyar hankali. Daidai narkewa a cikin aromatic da aliphatic hydrocarbons, ketones da magni kaushi. Shi ne kuma narkewa a iyakacin duniya mafita da kuma mai ruwa-ruwa Alkali mafita. Bayan curing phenol-formaldehyde resins ana tuba zuwa gustosshitye microheterogeneous polymers na amorphous tsarin.

Ina da phenol formaldehyde guduro ne amfani?

- a samar da robobi: ƙẽƙashe guduro kira resite, ƙarfafa mai, a gaban sulphonic acid - karbolit, a gaban lactic acid - neoleykoritami.

- a samar da varnishes, adhesives, roba, bearings, birki gammaye, bukukuwa domin wasan biliyard.

- daga karbolit (warke phenol-formaldehyde guduro) kerarre gidaje multimers wasu Soviet model.

- kuma da abu amfani da wani m domin samar da cika gyaren qagaggun tare da daban-daban fillers (itace gari, gilashin fiber, cellulose), chipboard da fibreboard, mai yawan zuba da kuma impregnating qagaggun (for cika fiber kuma saka kayan for plywood) adhesives.

Phenol formaldehyde guduro: karža da lafiyar qasa

Kuma formaldehyde da phenol amfani a yi na phenol-formaldehyde resins, suna mai guba da kuma flammable abubuwa. Formaldehyde guduro yana da mummunan tasiri a kan jikin mutum: Sanadin eczema da dermatitis. Bugu da ƙari, formaldehyde kuma yana da carcinogenic Properties.  

Bakelite - taurare samfurin na phenol-formaldehyde guduro a gaban mai kara kuzari. Wannan al'amari ne na bayar da muhimmanci a daban-daban duniyoyin na rayuwar dan Adam. Bakelite ne wani matalauci shugaba na zafi, amma farfado da kyau jure inji lalacewar: buga, buga, gogayya ko matsi. Easy yin aiki a kan wani musamman lathe. Shi ne mai kyau insulator. A diluted Alkali, acid da kuma ruwa ba tambaya, sai domin mayar da hankali sulfuric ko nitric acid. Resistant zuwa +300 digiri, na faruwa a mafi girma konewa yanayin zafi.

Yana da aka asali tsara don zama a madadin shellac - musamman guduro samar a cikin yanayi na wurare masu zafi lacquer sikelin kwari.

Phenolics. aikace-aikace

Phenoplast - wani roba wanda aka samu ta hanyar solidification formaldehyde resins a dagagge yanayin zafi a hade tare da wani filler. A halin yanzu, wannan abu ne yarda da juna, a da kaddarorin. Amfani phenoplasts ake yi:

- abu nufi don buga kewaye allon - getinaks.

- wani abu don samar da wani tsarin abu - PCB.

- cheap abubuwa ga hukumar wasannin - Checkers, dominoes, dara.

- wasu abubuwa na kitchen na'urorin haɗi: iyawa don gas stoves, kafaffu , kuma wuƙaƙe ne, tukwane, da kwanoni.

- Bakelite phenolic manne.

- lantarki kayayyakin - kwasfansu, matosai, lantarki mita, sauya, zango da lantarki motor housings, maha? Ar kwalaye, Magnetic actuators, da dai sauransu.;

- aka gyara domin aikin injiniya, msl, matakai domin escalators, daban-daban tashoshi da kuma knobs.

- kaya ado, tsarabobi, stationery, wasu bayanai hours.