Aliphatic polyamides ee qaabab kala duwan ayaa ganacsi ahaan loo soo saaray, kuwaas oo PA6, PA66, PA46, PA11 iyo PA12 ay yihiin kuwa ugu muhiimsan.Burburinta Oxidative ee PA waxay kuxirantahay heerka crystallinity iyo cufnaanta wajiga amorphous.Marka loo eego habka dhaqameed, polyamides aliphatic waxaa lagu dejiyaa qadar yar oo cusbo ah oo naxaas ah (ilaa 50 ppm) oo lagu daray halogen ions (sida iodine iyo bromide ions).Waxtarka nidaamkan xasilintu waa mid la yaab leh sababtoo ah ions copper waxaa loo tixgeliyaa gargaarka gabowga ee polyolefins.Habka xasilinta saamaynta naxaasta/nidaamka isku dhafan ee halogen ayaa weli la daraaseeyaa.
Amines caraf udgoon ayaa ah xasiliyayaal caadi ah oo kordhiya LTTS, laakiin marka lagu isticmaalo PA, waxay sababi karaan midab beddelka polymers.Antioxidants phenol waxay hagaajin kartaa midabka aasaasiga ah ka dib polycondensation si loo xasiliyo polyamide aliphatic.Guud ahaan, antioxidant-kan ayaa lagu daraa ka hor inta aan la joojin falcelinta kondensation-ka.
Jadwalka hoose wuxuu isbarbar dhigayaa sifooyinka xasiliyayaasha kala duwan ee loo isticmaalo polyamide aliphatic.
| nidaamka AO | Faa'iidada | Daciifnimo |
| cusbada Copper/iodide | Aad wax ku ool ah oo aad u hooseeya Marka heerkulka gabowga uu ka sarreeyo 150 °C, waxay si weyn wax ugu kordhineysaa LTTS ee polymerka | Kala daadsanaanta liidata ee polymers-ka Leaching waxay si fudud u dhacdaa marka la taabto biyo ama biyo/milooyin Waxaa laga yaabaa inuu keeno midab |
| Amines caraf udgoon | Waxay si weyn uga qayb qaadataa LTTS ee polymers-ka | Noqo mid aad u badan midab-doorasho |
| Phenols | Waxay si weyn uga qayb qaadataa LTTS ee polymers-ka Waxqabadka midabka wanaagsan Waxaa lagu dari karaa inta lagu jiro habka fiirsashada Ma jiraan wax falcelin ah oo ka yimaada polymers kale marka la isku daro |
Heerkulka sare ee gabowga (tusaale ka sarreeya 150°C), nidaamyada xasilinta copper/iodide waxay muujinayaan natiijooyinka ugu fiican.Si kastaba ha noqotee, heerkulka gabowga hooseeya, antioxidants phenolic oo keliya ama marka lagu daro fosfityada ayaa noqon kara mid waxtar leh.Faa'iidada kale ee isticmaalka antioxidants phenolic waa inay sii hayaan midabka asaasiga ah ee polypolymers ilaa da'da kulaylka si ka waxtar badan marka loo eego xasiliyeyaasha milixda naxaasta.
Midabaynta polymerka ka dib gabowga kulaylku ma hoos u dhaco si la mid ah sifooyinka farsamada.Midab-kala-soociddu waxay ku dhici kartaa xitaa da'da gaaban, laakiin xoogga jilicsanaanta iyo dhererka polymer-ka ma saameyn doono ilaa goor dambe.
Jirka weyn ee suugaanta ayaa qeexaya codsiyada badan ee polyamides-fiber-ka ee la xoojiyay ee warshadaha baabuurta, sida mashiinnada mishiinka, koofiyadaha hiitarka iyo giraanta, biriiga iyo kaydiyeyaasha isteerinka korantada, gacmo-gacmeedyada waalka, taayirada, xidhiidhiyeyaasha bareegga hawada iyo koofiyadaha.Antioxidants Phenolic, ama kaligiis ama lagu daro fosfit, ayaa ah xasiliyayaasha ugu fiican ee GFR PA66.
Qaabka aasaasiga ah ee isku dhafka phenol + fosfit waa 1098+168, kaas oo lagu dabaqi karo heerkul aad u hooseeya oo aan la wanaajinin, iyo midabka extrusion waa la hagaajiyay.Si kastaba ha ahaatee, nidaamyada polyamide sida xoojinta fiber galaas, heerkulka processing waa ka sarreeya (ku dhawaad 300 ° C), 168 heerkul sare oo burburay burburay, waqtigan, waxaan inta badan isticmaalnaa 1098 + S9228 sida isku dhafka ah ee iska caabinta heerkulka wanaagsan, taas oo sidoo kale waa. caanaha ugu badan ee loo isticmaalo naylon heerkulkiisu sarreeyo.
Natiijooyinka imtixaannada nidaamsan ka dib, waxaa la ogaaday in 1098 + S9228 ay weli haysato boos lagu hagaajiyo hagaajinta midabka ee naylon heerkulka sare leh, iyo Sarex Chemical waxay soo bandhigtay alaabada la cusboonaysiiyay SARAFOS 2628P5 (caabbinta fosfooraska ku salaysan) iyo SARANOX PA2624 (caqabadda phenol iyo fosfite isku darka) waxay leeyihiin waxqabad wanaagsan oo naylon ah oo heerkulka sare leh ee jaalaha ah, iyo xogta tijaabada ah ee la xiriirta waa sida soo socota:
PA66, 270°C kala saarid badan iyo tijaabo dubista kulul
| ■0.1%1098+0.2%9228 | 8.32 | 15.5 | 21.11 | 33.71 |
| ■0.1%109810.2%2628P5 | 3.85 | 10.88 | 17.02 | 21.16 |
| ■3% PA2624 | -3.25 | 1.87 | 4.94 | 12.21 |
Xogta kore waxaa go'aamiyay Shaybaadhka Kiimikada Sarex
Marka la barbardhigo qadar isku mid ah oo lagu daro SARAFOS 2628P5 iyo S9228, midabka extrusion badan iyo 120 ° C kaydinta kulaylka ee 12h waxay leeyihiin waxqabad wanaagsan, caabbinta hydrolysis ee sheyga laftiisa ayaa sidoo kale ka fiican kan S9228, kaas oo leh codsi wanaagsan. rajada wax ka beddelka PA.
Marka ay jiraan shuruudo sare oo loogu talagalay midabka bilowga ah, waxaa lagu talinayaa in lagu daro SARANOX PA2624, marka lagu daro foomka budada ah, waxaan sidoo kale ku siin karnaa macaamiisha PA antioxidant masterbatches iyo walxaha antioxidant-side-free, taas oo ku haboon in lagu daro oo la kala diro, oo caawiyo aqoon-is-weydaarsiga wax-soo-saarka inuu noqdo mid aan boodh lahayn.
| PA66, ka saarista badan ee 270 °C | 0.1%1098+0.2%9228 | 0.1%1098+0.2%2628P5 | 0.3% PA2624 |
| 1 extrusion |  |  |  |
| 3 extrusion |  |  |  |
| 5 extrusion |  |  |  |
| Dubo at 120 ° C, 12 saacadood
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Xogta kore waxaa go'aamiyay Shaybaadhka Kiimikada Sarex
Waqtiga boostada: Nov-14-2022