Aliphatic polyamide yezvimiro zvakasiyana-siyana zvakagadzirwa zvekutengesa, izvo PA6, PA66, PA46, PA11 uye PA12 ndiyo inonyanya kukosha.Oxidative degradation muPA zvinoenderana nehuwandu hwekristaro uye kuwanda kwechikamu cheamorphous.Zvinoenderana nemaitiro echinyakare, aliphatic polyamides inogadzikiswa netushoma emunyu wemhangura (kusvika 50 ppm) akasanganiswa ne halogen ions (senge iodine nebromide ions).Kushanda kweiyi stabilizer system kunoshamisa nekuti maion emhangura anoonekwa seyamuro yekuchembera muma polyolefins.Iyo nzira yekudzikamisa mhedzisiro yemhangura / halogen composite system ichiri kudzidzwa.
Anonhuhwirira amines akajairwa ma stabilizer anowedzera LTTS, asi kana akashandiswa muPA, anogona kukonzera discoloration yemapolymer.Phenol antioxidants inogona kuvandudza iyo yekutanga ruvara mushure mepolycondensation kudzikamisa aliphatic polyamide.Kazhinji, iyi antioxidant inowedzerwa kusati kwaitwa polycondensation reaction.
Tafura iri pazasi inofananidza zvimiro zveakasiyana stabilizer anoshandiswa kune aliphatic polyamide.
| AO system | Advantage | Kushaya simba |
| Mhangura munyu/iodide | Inoshanda zvakanyanya pane yakaderera concentrations Kana tembiricha yekuchembera iri pamusoro pe150 ° C, inobatsira zvakanyanya kuLTTS yepolymer. | Murombo dispersibility muma polymers Leaching inoitika nyore kana yasangana nemvura kana mvura / zvinonyungudutsa Inogona kukonzera discoloration |
| Zvinonhuhwirira amines | Iyo inobatsira zvakanyanya kune iyo LTTS yemapolymers | Iva muhuwandu hwepamusoro discoloration |
| Phenols | Iyo inobatsira zvakanyanya kune iyo LTTS yemapolymers Kuita kwakanaka kwemavara Inogona kuwedzerwa panguva yekusungwa Hapana maitiro epadivi anoitika nemamwe mapolymer panguva yekusanganiswa |
Pakuchembera kwakanyanya (eg pamusoro pe150°C), copper/iodide stabilizer masisitimu anoratidza mhedzisiro yakanaka.Nekudaro, pakudziya kwakaderera kwekuchembera, phenolic antioxidants chete kana musanganiswa nephosphites inogona kushanda zvakanyanya.Imwe bhenefiti yekushandisa phenolic antioxidants ndeyekuti vanochengeta iyo yekutanga ruvara rwepolypolymers kusvika kupisa kuchembera zvinobudirira kupfuura copper salt stabilizers.
Kuchinja kwepolymer mushure mekuchembera kwekupisa hakudzike mukuenderana nemaitiro ayo emagetsi.Discoloration inogona kuitika kunyangwe kwenguva pfupi yezera, asi iyo tensile elastic simba uye kureba kwepolymer haizokanganiswe kusvika gare gare.
Boka guru remabhuku rinotsanangura mashandisirwo mazhinji egirazi-fiber yakasimbiswa polyamides muindasitiri yemotokari, senge mashizha einjini, zvivharo zveradiyeta uye magrilles, mabhureki uye magetsi ekufambisa accumulators, maoko evharuvhu, matayi, air brake contactors uye mahood.Phenolic antioxidants, ingave yega kana yakasanganiswa nephosphite, ndiyo yakanyanya kugadzikana yeGFR PA66.
Iyo yekutanga formula ye phenol + phosphite musanganiswa ndeye 1098 + 168, iyo inogona kuiswa kune yakaderera isina-inonatsiridzwa tembiricha yekugadzira, uye iyo extrusion ruvara inovandudzwa.Nekudaro, kune polyamide masisitimu akadai segirazi fiber reinforcement, tembiricha yekugadziridza yakakwira (inoda kusvika 300 ° C), 168 yakakwira tembiricha yekuora kutadza, panguva ino, isu tinonyanya kushandisa 1098 + S9228 musanganiswa wakadai wekupisa kuri nani kuramba, kuri zvakare. iyo inonyanya kushandiswa formula mune yakakwirira-tembiricha naironi.
Mushure mekurongeka kwemhedzisiro yebvunzo, zvinoonekwa kuti 1098+S9228 ichine nzvimbo yekuvandudza mukuvandudza kwemavara enylon-tembiricha, uye Sarex Chemical yakatanga zvigadzirwa zvakakwidziridzwa SARAFOS 2628P5 (phosphorus-based anobatsira kuramba) uye SARANOX PA2624 (yakavharira phenol uye phosphite. musanganiswa) kuve nekuita zvirinani munylon yakakwira-tembiricha yero, uye iyo yakakodzera bvunzo data ndeaya anotevera:
PA66, 270 ° C yakawanda extrusion uye inopisa kubika bvunzo
| ■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 |
Iyo data iri pamusoro yakatemerwa neSarex Chemical Laboratory
Zvichienzaniswa nehuwandu hwekuwedzera kweSARAFOS 2628P5 uye S9228, ruvara rwekuwedzeredza kwakawanda uye 120 °C kupisa kwekuchengetedza kwe12h vane kushanda kwakanaka, uye hydrolysis kuramba kwechigadzirwa pachacho zvakare nani pane iyo yeS9228, iyo ine kushandiswa kwakanaka. tarisiro muPA shanduko.
Kana pane zvakakwirira zvinodiwa zvemuvara wekutanga, zvinokurudzirwa kuwedzera SARANOX PA2624, kunze kwefomu yehupfu, tinogonawo kupa vatengi nePA antioxidant masterbatches uye carrier-free antioxidant particles, iyo iri nyore kuwedzera uye kuparadzira, uye kubatsira. musangano wekugadzira usave usina guruva.
| PA66, yakawanda extrusion pa270 °C | 0.1%1098+0.2%9228 | 0.1%1098+0.2%2628P5 | 0.3% PA2624 |
| 1 extrusion |  |  |  |
| 3 extrusions |  |  |  |
| 5 extrusions |  |  |  |
| Bika pa 120 ° C, 12h
|  |  |  |
Iyo data iri pamusoro yakatemerwa neSarex Chemical Laboratory
Nguva yekutumira: Nov-14-2022