I-Aliphatic polyamides yezakhiwo ezahlukeneyo ziye zaveliswa ngokurhweba, apho i-PA6, i-PA66, i-PA46, i-PA11 kunye ne-PA12 ibaluleke kakhulu.Ukuthotywa kwe-oxidative kwi-PA kuxhomekeke kwinqanaba le-crystallinity kunye nobuninzi besigaba se-amorphous.Ngokwendlela yendabuko, i-aliphatic polyamides iqiniswe ngamancinci amancinci e-copper salts (ukuya kwi-50 ppm) edibene ne-halogen ions (njenge-iodine kunye ne-bromide ions).Ukusebenza kakuhle kwesi sistim sokuzinzisa kuyamangalisa kuba ii-ion zobhedu zithathwa njengoncedo lokuguga kwiipololefins.Indlela yozinziso lwenkqubo yobhedu/ihalogen isafundwa.
I-amines enevumba elimnandi zizinzisi eziqhelekileyo ezonyusa i-LTTS, kodwa xa zisetyenziswa e-PA, zinokubangela ukuguquka kombala kweepholima.I-Phenol antioxidants inokuphucula umbala wokuqala emva kwepolycondensation ukuzinzisa i-aliphatic polyamide.Ngokuqhelekileyo, le antioxidant yongezwa ngaphambi kokuba i-polycondensation reaction ipheliswe.
Itheyibhile engezantsi ithelekisa iipropati ze-stabilizers ezahlukeneyo ezisetyenziselwa i-aliphatic polyamide.
| Inkqubo ye-AO | Inzuzo | Ubuthathaka |
| Iityuwa zobhedu / iodide | Isebenza kakhulu kwiindawo eziphantsi Xa ubushushu bokukhula bungaphezulu kwe-150 °C, bunegalelo elikhulu kwi-LTTS yepolymer. | I-dispersibility engalunganga kwiipolymers Ukuvuza kwenzeka ngokulula xa udibana namanzi okanye amanzi/izinyibilikisi Inokubangela ukuguquka kwebala |
| iiminerali ezinuka kamnandi | Inegalelo elikhulu kwi-LTTS yeepolima | Yiba kwindawo ephezulu ukuguquka kwebala |
| Phenols | Inegalelo elikhulu kwi-LTTS yeepolima Ukusebenza kakuhle kombala Inokongezwa ngexesha lenkqubo yoxinaniso Akukho zimpendulo zecala zenzeka kunye nezinye iipholima ngexesha lokuxuba |
Kubushushu obuphezulu bokuguga (umz. ngaphezulu kwe-150°C), iinkqubo zokuzinzisa ikopolo/iodide zibonisa iziphumo ezilungileyo.Nangona kunjalo, kwiqondo lokushisa eliphantsi lokuguga, i-phenolic antioxidants yodwa okanye ngokudibanisa ne-phosphites inokusebenza ngakumbi.Olunye uncedo lokusebenzisa i-phenolic antioxidants kukuba bagcina umbala ophambili weepolypolymers de ubushushu buguga ngokusebenzayo ngakumbi kunezinzisi zetyuwa zobhedu.
I-discoloration ye-polymer emva kokuguga kobushushu ayinciphi ngokuhambelana neempawu zayo zomatshini.Ukuguquka kombala kunokwenzeka nakwixesha elifutshane lobudala, kodwa ukomelela kwe-elastic elastic kunye nobude bepolymer akuyi kuchaphazeleka kude kube kamva.
Uluhlu olukhulu loncwadi luchaza usetyenziso oluninzi lweglasi-ifayibha eyomelezwe iipolyamides kushishino lweemoto, ezinje ngencakuba ze-injini, iikepusi zeradiyetha kunye neegrile, iziqhoboshi kunye neziqokeleli zokuqhuba umbane, imikhono yevalvu, amatayara, ii-air brake contactors kunye neehood.I-Phenolic antioxidants, nokuba yodwa okanye idityaniswe ne-phosphite, zezona zizinzisi ze-GFR PA66.
Isiseko sefomula ye-phenol + phosphite indibaniselwano yi-1098 + 168, enokuthi isetyenziswe kumaqondo okushisa aphantsi angaphuculwanga, kwaye umbala we-extrusion uphuculwe.Nangona kunjalo, kwiinkqubo ze-polyamide ezifana nokuqinisa ifayibha yeglasi, ubushushu bokusebenza buphezulu (phantse i-300 ° C), i-168 ukusilela kokubola kobushushu obuphezulu, ngeli xesha, sisebenzisa kakhulu i-1098 + S9228 indibaniselwano enjalo yokumelana nobushushu obungcono, obukwakhona. eyona fomyula isetyenziswa kakhulu kwinayiloni yobushushu obuphezulu.
Emva kweziphumo zovavanyo olucwangcisiweyo, kufunyenwe ukuba i-1098 + S9228 isenayo indawo yokuphucula umbala wenayiloni yobushushu obuphezulu, kwaye iSarex Chemical yazisa iimveliso eziphuculweyo iSARAFOS 2628P5 (i-phosphorus-based axiliary resistance) kunye neSARANOX PA2624 (ithintele phenol kunye nephosphite indibaniselwano) zibe nokusebenza ngcono kwinayiloni yobushushu obuphezulu obutyheli, kunye nedatha yovavanyo efanelekileyo ngolu hlobo lulandelayo:
PA66, 270 ° C extrusion ezininzi kunye novavanyo lokubhaka eshushu
| ■ 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 |
Le datha ingentla yagqitywa yiSarex Chemical Laboratory
Xa kuthelekiswa nomlinganiselo ofanayo wokongezwa kwe-SARAFOS 2628P5 kunye ne-S9228, umbala we-extrusion ezininzi kunye ne-120 ° C yokugcina ubushushu kwi-12h isebenze kakuhle, kunye nokuxhathisa i-hydrolysis yemveliso ngokwayo nayo ingcono kune-S9228, enesicelo esihle. amathemba kuhlengahlengiso lwePA.
Xa kukho iimfuno eziphezulu zombala wokuqala, kucetyiswa ukuba ungeze i-SARANOX PA2624, ngaphezu kwefom ye powder, sinokubonelela abathengi nge-PA antioxidant masterbatches kunye ne-carrier-free antioxidant particles, ekulungele ukongeza kunye nokusabalalisa, kunye nokunceda. iworkshop yemveliso ingabi nathuli.
| I-PA66, i-extrusion ephindaphindiweyo kwi-270 °C | 0.1% 1098 + 0.2% 9228 | 0.1%1098+0.2%2628P5 | 0.3% PA2624 |
| I-1 extrusion |  |  |  |
| I-3 extrusions |  |  |  |
| I-5 extrusions |  |  |  |
| Bhaka kwi-120 ° C, i-12h
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Le datha ingentla yagqitywa yiSarex Chemical Laboratory
Ixesha lokuposa: Nov-14-2022