Phenol-formaldehyde dumin kara. The diyaarinta iyo isticmaalka. guryaha

Phenol cusbi formaldehyde - cusbi a dardaro isagoo sifooyinka thermosets ama thermosets. Beeyada Kuwaasi waa walxaha oligomeric ama dareere, laga heli by polycondensation of formaldehyde la phenol ee dhexdhexaad ah acidic ama cawaaqib xumadoodu waxay (resol, cusbi novolac ama bakelite). Tani waxay sii saameeyaa guryaha alaabta final.

The sifooyinka Beeyada phenol-formaldehyde

cusbi formaldehyde Phenol (formula [-C6H3 (OH) -CH2-] n) ayaa ningax sare korontada, daxalka wanaagsan iyo xasiloonida farsamo. Dhammaataan milma ee Consort leedahay beduliyum iyo aliphatic, ketones iyo qase warankiilada leh. Sidoo kale waa L. in xal mugdiga iyo xalalka alkali aqueous. Ka dib markii Asagoo arigtadaa ka Beeyada phenol-formaldehyde waxaa beddelay gustosshitye polymers microheterogeneous dhismaha qaab ma lahayn.

Halkee cusbi formaldehyde phenol loo isticimaali karaa?

- in wax soo saarka ee balaastigga: cusbi waa sii qallafiyey yeedhay resite, bedesheen saliid ay goobjoog ka ahaayeen acids sulphonic - karbolit, iyadoo ay wada joogaan of jėrto - neoleykoritami;

- in wax soo saarka ee varnishes, adhesives, dardaro, saa'idka, pads kala jejebiyey, kubadaha for bilyaar,

- ka karbolit (daaweyn cusbi phenol-formaldehyde) macmalay multimers guryaha qaar ka mid ah lagu daydo Soviet,

- sidoo kale maalkii loo isticmaalaa sida gal ah wax soo saarka ee darey buuxsami wax taaj oo kale la buuxiyo kala duwan (bur qoryo, fiber galaas, cellulose), afjary iyo fibreboard, walxuhu (for fiber buuxsamay iyo waxyaabaha-xidhkii shubtay iyo impregnating for plywood) adhesives.

cusbi formaldehyde Phenol: aqbaliddoodii iyo ecology

Oo formaldehyde iyo phenol loo isticmaalo soo saaridda ee Beeyada phenol-formaldehyde, waa walxaha sunta ah iyo ololi kara. cusbi formaldehyde leedahay saamayn taban ku leh jidhka bini'aadamka, sababaha canbaar iyo dermatitis. Waxaa intaa dheer, formaldehyde sidoo kale wuxuu leeyahay sifooyin cudurka kansarka.  

Bakelite - qallafiyey wax soo saarka ee cusbi phenol-formaldehyde ay goobjoog ka ahaayeen qaar kaaliya. Arrinkan waa muhiimad weyn dhinacyo kala duwan oo ka mid ah nolosha aadanaha. Bakelite waa kaari miskiin ah kulaylka, laakiin muujinayaa iska caabin wanaagsan in dhaawac: lama filaan ah, si lama filaan ah, khilaaf ama cadaadis. Easy in ay ka shaqeeyaan lathe gaar ah. Waa insulator wanaagsan. The qasi alkali, acid iyo biyo ma khuseeyo, marka laga reebo sulfuric xoog ama acids nitric. Adkaysi u +300 darajo, waxa uu dhacaa marka heerkulku sari sare.

Waxaa markii hore loogu talagalay in bedel ah shellac - cusbi gaar ah soo saaray nooca cayayaan qiyaasta xamuurada kulaylaha.

Phenolics. codsiga

Phenoplast - caag ah oo laga helay by Beeyada formaldehyde solidification at heerkulka sare isku dhafan oo filler kasta. Currently, wax this waa unsurpassed in hantida. Isticmaalka phenoplasts la sameeyey:

- walax loogu talagalay loox wareeg daabacan - getinaks;

- walax abuurayo wax dhisme ah - PCB,

- xubno raqiis ah kulamada guddiga - checkers, dumno, jeska,

- qaybo ka mid ah accessories jikada: qabtaa waayo, shooladaha gaaska, dharyo sugan iyo mindiyo, kuwaasoo ah dheryihii, iyo dabqaadayaashii;

- xabagta phenolic Bakelite;

- alaabta korontada - saldhig, gelanayo, mitir korontada, daaro, Relays, guryo motor koronto, sanduuqyada isgoyska, actuators magnetic, iwm.,

- qaybaha for injineernimada, tus, tallaabo si escalators, boosteejada kala duwan iyo burooyinkoodii,

- qurxiyo dhar, qadiin ah, qalabka xafiisyada, faahfaahinta qaar ka mid ah saacadood.