Wararka

"Metallocene" waxaa loola jeedaa isku dhafka birta dabiiciga ah ee ay sameeyeen biraha kala-guurka (sida zirconium, titanium, hafnium, iwm.) iyo cyclopentadiene. Polypropylene oo lagu farsameeyay biraha birta ah waxaa lagu magacaabaa metallocene polypropylene (mPP).

Alaabooyinka Metallocene polypropylene (mPP) waxay leeyihiin qulqul sare, kulayl sarreeya, xannibaad sare, caddayn gaar ah iyo hufnaan, ur hoose, iyo codsiyada suurtagalka ah ee Fibers, Filinka Cast, Duridda Duritaannada, Heerkulbeegga, Caafimaadka, iyo kuwa kale. Soo saarista metallocene polypropylene (mPP) waxay ku lug leedahay dhowr tillaabo oo muhiim ah, oo ay ku jiraan diyaarinta kicinta, polymerization, iyo habaynta ka dib.

1. Diyaarinta kicinta:

Doorashada Metallocene Katalyst: Doorashada kicinta metallocene ayaa muhiim u ah go'aaminta sifooyinka mPP ee ka dhashay. Kiciyayaashani waxay caadi ahaan ku lug leeyihiin biraha kala-guurka, sida zirconium ama titanium, sandwiched inta u dhaxaysa cyclopentadienyl ligands.

Isku-darka Cocatalyst: Ka-qaadeyaasha Metallocene ayaa inta badan loo isticmaalaa iyadoo lala kaashanayo cocatalyst, sida caadiga ah xarun aluminium ku salaysan. Cocatalyst-ku wuxuu dhaqaajiyaa kicinta birta, taasoo u oggolaanaysa inuu bilaabo falcelinta polymerization.

2. Polymerization:

Diyaarinta Kaydka: Propylene, monomer for polypropylene, ayaa sida caadiga ah loo isticmaalaa quudinta aasaasiga ah. propylene waa la nadiifiyaa si looga saaro wasakhda faragelin kara habka polymerization.

Dejinta Reactor: Fal-celinta polymerization waxay ku dhacdaa reactor iyada oo la raacayo shuruudo taxaddar leh. Qalabaynta reactor waxaa ka mid ah kicinta metallocene, cocatalyst, iyo waxyaabo kale oo lagu daro oo looga baahan yahay guryaha polymer-ka ee la rabo.

Shuruudaha Polymerization: Xaaladaha falcelinta, sida heerkulka, cadaadiska, iyo wakhtiga degenaanshaha, ayaa si taxadar leh loo xakameeyaa si loo hubiyo miisaanka molecular ee la doonayo iyo qaab dhismeedka polymer. Daroogayaasha Metallocene waxay awood u siinayaan in si sax ah loo xakameeyo cabbirradan marka la barbar dhigo kiciyaasha dhaqameed.

3. Copolymerization (Ikhtiyaar):

Ku darida Co-monmers: Xaaladaha qaarkood, mPP waxa laga yaabaa in la mideeyo monomers kale si wax looga beddelo hantideeda. Iskaashatada caadiga ah waxaa ka mid ah ethylene ama alfa-olefins kale. Isku-darka wada-shaqeeyayaasha waxay u oggolaanaysaa is-beddelka polymer-ka codsiyada gaarka ah.

4. Joojinta iyo Deminta:

Joojinta Falcelinta: Marka polymerization-ka la dhammeeyo, falcelinta waa la joojiyay. Tan waxaa badanaa lagu gaaraa iyada oo la soo bandhigayo wakiilka joojinta kaas oo ka falceliya dhamaadka silsiladda polymer-ka firfircoon, joojinta koritaanka dheeraadka ah.

Deminta: polymerka si degdeg ah ayaa loo qaboojiyaa ama la demiyaa si looga hortago falcelino kale iyo in la adkeeyo polymerka.

5. Soo-kabashada Polymer-ka iyo Ka-hortagga Ka-hortagga:

Kala-soocidda Polymer: Polymer-ka ayaa ka soocay isku-darka falcelinta. monomers aan la falgelin, hadhaaga kicinta, iyo alaabada kale ayaa lagu saaraa iyadoo loo marayo farsamooyin kala duwan oo kala duwan.

Tallaabooyinka Hagaajinta Kadib: mPP waxa laga yaabaa inay marto tillaabooyin habaysan oo dheeraad ah, sida ka saarista, isku-darka, iyo pelletization, si loo gaadho qaabka iyo guryaha la doonayo. Talaabooyinkani waxay sidoo kale u oggolaanayaan in lagu daro waxyaabaha lagu daro sida kuwa silbashooyinka ah, antioxidants, stabilizers, wakiilada nuclei-ka, midabada, iyo kuwa kale ee wax lagu daro.

Hagaajinta mPP: U Quus Qoto dheer ee Doorarka Muhiimka ah ee Waxqabadka Waxyaalaha lagu daro

Wakiilada Slip: Walaxaha sibidhka, sida amides dufanka dheer ee silsiladda dheer, ayaa inta badan lagu daraa mPP si loo yareeyo khilaafka u dhexeeya silsiladaha polymer, ka hortagga dhejinta inta lagu jiro habaynta. Tani waxay gacan ka geysaneysaa hagaajinta hababka wax-soo-saarka.

Kor uqaadayaasha socodka:Kor-u-qaadayaasha socodka ama qalabka wax lagu farsameeyo, sida waxes polyetylen, ayaa loo isticmaalaa si loo hagaajiyo socodka dhalaalka mPP. Waxyaalaha lagu daro waxay yareeyaan viscosity waxayna kor u qaadaan awooda polymerka ee buuxinta godadka caaryada, taasoo keenaysa hawlkarnimo wanaagsan.

Antioxidants:

Xasijiyeyaasha: Antioxidants waa daroogo lagama maarmaan ah oo ka ilaaliya mPP hoos u dhaca inta lagu jiro habaynta. phenols iyo fosfityada xannibay ayaa caadi ahaan loo isticmaalaa xasiliyayaal joojiya samaynta xag-jirrada xorta ah, ka hortagga kulaylka iyo nabaad-guurka.

Wakiilada Nukliyeerka:

Waxyaalaha nukliyeerka ah, sida talc ama xeryahooda kale ee aan noolayn, ayaa lagu daraa si kor loogu qaado samaynta qaab dhismeedka crystalline ee la amray ee mPP. Waxyaabahan lagu daro waxay kor u qaadaan sifooyinka farsamada ee polymer-ka, oo ay ku jiraan adkaanta iyo iska caabbinta saameynta.

Midabeeyayaasha:

Midabka iyo Midabka: Midabada ayaa inta badan lagu daraa mPP si loo gaaro midabyo gaar ah badeecada ugu dambeysa. Midabka iyo midabaynta ayaa lagu doortaa iyadoo lagu saleynayo midabka la doonayo iyo shuruudaha codsiga.

Wax ka beddelayaasha saamaynta:

Elastomers: Codsiyada halka iska caabbinta saameyntu ay muhiim tahay, wax ka beddelayaasha saameynta sida caagga ethylene-propylene ayaa lagu dari karaa mPP. Wax-ka-beddelayaashani waxay hagaajiyaan adkaanta polymer-ka iyada oo aan la hurin hanti kale.

Ku-qabsoomayaasha:

Maleic Anhydride Grafts: Ku-qabsayaasha waxaa laga yaabaa in loo isticmaalo si loo wanaajiyo is-waafajinta u dhexeeya mPP iyo polymers kale ama wax lagu daro. Maleic anhydride grafts, tusaale ahaan, waxay wanaajin kartaa adhesion ka dhexeeya qaybaha kala duwan ee polymer.

Slip and Antiblolock:

Wakiilada Sibidhka: Marka lagu daro dhimista is jiid jiidka, wakiilada silbashooyinka waxay sidoo kale u dhaqmi karaan sidii wakiilada ka hortagga xannibaadda. Waxyaalaha lidka-hortagga ah waxay ka hortagaan isku-ku-dhejinta aflaanta ama dusha xaashida inta lagu jiro kaydinta.

(Waxaa muhiim ah in la ogaado in wax-soo-saarka gaarka ah ee loo isticmaalo qaabeynta mPP ay ku kala duwanaan karaan iyadoo lagu saleynayo codsiga loogu talagalay, shuruudaha habaynta, iyo sifooyinka walxaha la rabo. Soo-saareyaasha si taxadar leh u dooro waxyaabahan lagu daro si ay u gaaraan waxqabadka ugu fiican ee alaabta dhamaadka. Isticmaalka metallocene ee kicinta soo saarista mPP waxay bixisaa heer dheeraad ah oo xakameyn iyo sax ah, taas oo u oggolaanaysa in lagu daro waxyaabaha lagu daro hab si fiican loo hagaajin karo si loo buuxiyo shuruudaha gaarka ah.)

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mPP waxay u soo baxday sidii polymer kacaan, oo bixisa siyaalo la wanaajiyey iyo waxqabad la wanaajiyey ee codsiyada kala duwan. Si kastaba ha ahaatee, sirta ka dambeysa guusheeda kuma koobna oo kaliya sifooyinkeeda balse sidoo kale waxay ku jirtaa adeegsiga istiraatijiyadeed ee lagu daro farsamaynta horumarsan.

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