Styrene Unsaturated dareere organic ah

Faahfaahinta alaabta

Styrene, oo leh caanaha kiimikaad ee C₈H₈, waa nooc ka mid ah isku dhafka organic ka kooban giraanta benzene iyo koox ethyl ah. Heerkulka qolka, waa dareere saliid leh oo hufan oo aan midab lahayn waana guban kara. Kooxda ethyl ee ku jirta molecule-keeda waxay samaysaa nidaam isku xidhan, kaas oo saameeya fal-celinta kiimikada. Styrene waa mid aan lagu milmi karin biyaha laakiin waxay ku milmaan inta badan dareerayaasha organic sida ethanol iyo ether, waana monomer muhiim ah oo loo yaqaan 'synthetic resins', rubbers synthetic, iyo resins sarrifka ion. Oktoobar 27, 2017, Hay'adda Caalamiga ah ee Cilmi-baarista Kansarka (IARC) ee Ururka Caafimaadka Adduunka waxay u kala saartay styrene inuu yahay kansarka 2B, oo macnaheedu yahay "laga yaabo inuu kansar keeno aadanaha". Waaxda caafimaadka ee Mareykanka ayaa sidoo kale ku taxay mid ka mid ah cudurada kansarka ee suurtagalka ah. Iyadoo ay ugu wacan tahay codsigeeda ballaaran iyo khataraha caafimaadka iyo deegaanka ee iman kara, wax soo saarka, isticmaalka, iyo ilaalinta styrene waxay ku xiran yihiin xeerar adag.

Codsiga alaabta

Xaaladaha codsiga ee styrene inta badan waxaa ka mid ah warshadaha polymer-ka, warshadaha caagga ah, warshadaha fiber, synthesis organic, warshadaha elektiroonigga ah, iyo warshadaha dhismaha / baabuurta.

1. Warshadaha Polymer: Styren waa monomer fure u ah isku dhafka polymers sida polystyrene (PS), kaas oo leh daahfurnaan sare, sifooyin farsamo oo wanaagsan, iska caabin kiimikaad ah. Waxaa si weyn loogu isticmaalaa baakadaha cuntada, meelaha korontada lagu xiro, alaabta lagu ciyaaro, iwm. Intaa waxaa dheer, styrene sidoo kale waxaa loo isticmaalaa in lagu soo saaro walxaha sida acrylonitrile-styrene copolymer (SAN).

2. Warshadaha caagga ah: Styrene oo lagu daray butadiene waxay sameeyaan styrene-butadiene rubber (SBR), kaas oo ah mid u adkaysta da'da iyo gabowga, waxaana inta badan loo isticmaalaa taayirada, qaybaha baabuurta, iyo alaabada caagga warshadaha. Waxa kale oo ay ku lug leedahay soo saarista acrylonitrile-butadiene-styrene rubber (NBR), kaas oo saliid u adkaysta oo ku habboon codsiyada baabuurta iyo hawada hawada.

3. Warshadaha Fiber: Styren waxaa loo isticmaali karaa in lagu farsameeyo fiilooyinka polystyrene, kuwaas oo inta badan loo isticmaalo dharka, alaabta guriga, iyo dunta kale.

4. Isku-dhafka dabiiciga ah: Styren wuxuu u adeegaa sidii dhexdhexaad muhiim ah, iyada oo loo marayo hydrogenation iyo falcelinta dheeraadka ah, si loo abuuro xeryahooda organic kala duwan. Ka-soo-saarkeedu waxa ay leeyihiin codsiyo ballaadhan oo dawada, dahaarka, udugga, iyo sunta cayayaanka lagu dilo.

5. Warshadaha elektiroonigga ah: Styrene iyo copolymers-keeda waxaa loo isticmaalaa in lagu soo saaro agabka indhaha (sida lenses) iyo walxaha baakadaha elektiroonigga ah (sida caagagga caaga ah), oo bixiya dahaarka iyo ilaalinta korantada.

6. Warshadaha dhismaha iyo baabuurta: polymers Styrene waxaa loo isticmaalaa in lagu soo saaro alaabada dahaadhka, alaabada dahaadhka, iyo qaybaha baabuurta, iyagoo buuxinaya shuruudaha waxqabadka dhismaha iyo warshadaha baabuurta. Codsiyadani waxay muujinayaan booska udub-dhexaadka ah ee styrene ee sayniska kiimikada iyo agabka.

Xaaladda kaydinta

Kaydinta styrene waa inay si adag u raacdaa xeerarka badbaadada. Shuruudaha ugu muhiimsan waa sida soo socota:

1. Deegaanka kaydinta: Waa in lagu kaydiyaa bakhaar qabow oo hawo leh, kana fog ilaha dabka iyo meelaha kulaylka. Heerkulka bakhaarku waa inuusan dhaafin 30 ℃ (ilo wareedyo qaarkood waxay soo jeedinayaan in aan ka badnayn 37 ℃). Baakadaha waa in la xidhaa oo waa in aan la taaban hawada si looga hortago falcelinta polymerization.

2. Kaydinta goonida ah: Waa in si gooni ah loo kaydiyaa oksidaants, acids, halogens, iwm, kana fogaato kaydinta isku dhafan. Kuma habboona kaydinta baaxadda weyn ama kaydinta muddada dheer. Waxaa lagu talinayaa in la xakameeyo xilliga kaydinta (sida wax aan ka badnayn 90 maalmood).

3. Goobaha badbaadada: Isticmaal nalalka aan qarxin iyo tas-hiilaadka hawo-siinta. Ha isticmaalin qalabka farsamada iyo qalabka laga yaabo inay soo saaraan dhimbiil. Aagga kaydinta waa in lagu qalabeeyaa qalabka wax ka qabashada degdega ah ee daadsan (sida agabka xayeysiiska) iyo aaladaha la socodka cadaadiska.

4. Ilaalinta khaaska ah: Sida caadiga ah, walxaha lidka-polymerization-ka (sida tert-butyl catechol, TBC) ayaa lagu daraa alaabta, iyo waxtarka wakiilka ka hortagga-polymerization waa in si joogto ah loo hubiyo. Waxaa lagu talinayaa in la sameeyo nidaamka ilaalinta nitrogen si looga hortago oksaydhka iyo polymerization ka xannibaya waalka neefsashada.