Ua hana ʻia nā polyamides aliphatic o nā hale like ʻole, ʻo ia ka PA6, PA66, PA46, PA11 a me PA12 ka mea nui loa.ʻO ka hoʻohaʻahaʻa oxidative ma PA e pili ana i ke kiʻekiʻe o ka crystallinity a me ka paʻa o ka pae amorphous.E like me ke ʻano kuʻuna, hoʻopaʻa ʻia nā polyamide aliphatic me ka liʻiliʻi o nā paʻakai keleawe (a hiki i 50 ppm) i hui pū ʻia me nā ion halogen (e like me nā iodine a me nā bromide ion).ʻO ka maikaʻi o kēia ʻōnaehana stabilizer he mea kupanaha no ka mea ua manaʻo ʻia nā ion keleawe he kōkua ʻelemakule i nā polyolefins.Ke aʻo ʻia nei ke ʻano o ka hoʻopaʻa ʻana i ka ʻōnaehana copper/halogen composite.
ʻO nā amine Aromatic nā stabilizer maʻamau e hoʻonui ai i ka LTTS, akā ke hoʻohana ʻia i PA, hiki iā lākou ke hoʻololi i nā polymers.Hiki i nā antioxidants Phenol ke hoʻomaikaʻi i ke kala mua ma hope o ka polycondensation e hoʻopaʻa i ka polyamide aliphatic.ʻO ka maʻamau, hoʻohui ʻia kēia antioxidant ma mua o ka pau ʻana o ka hopena polycondensation.
Hoʻohālikelike ka papa ma lalo i nā waiwai o nā stabilizer like ʻole i hoʻohana ʻia no ka polyamide aliphatic.
| ʻōnaehana AO | Pōmaikaʻi | Nawaliwali |
| Nā paʻakai keleawe/iodide | Pono loa i nā haʻahaʻa haʻahaʻa Ke piʻi ka mahana kahiko ma luna o 150 °C, hāʻawi nui ia i ka LTTS o ka polymer. | Hoʻopuehu maikaʻi ʻole i nā polymers Hiki maʻalahi ka leaching inā pili me ka wai a i ʻole ka wai Hiki ke hoʻololi ke kala |
| Nā amine ʻala | Hāʻawi nui ia i ka LTTS o nā polymers | E noho i loko o nā manaʻo kiʻekiʻe ka waihoʻoluʻu |
| Phenols | Hāʻawi nui ia i ka LTTS o nā polymers Hana kala kala maikaʻi Hiki ke hoʻohui ʻia i ka wā o ka hoʻopaʻa ʻana ʻAʻohe hopena ʻaoʻao me nā polymers ʻē aʻe i ka wā o ka hui ʻana |
Ma nā mahana wela kahiko (e laʻa ma luna o 150°C), hōʻike nā ʻōnaehana stabilizer keleawe/iodide i nā hopena maikaʻi loa.Eia nō naʻe, i nā wela haʻahaʻa haʻahaʻa, hiki ke ʻoi aku ka maikaʻi o nā antioxidants phenolic wale nō a i hui pū ʻia me nā phosphites.ʻO kekahi pōmaikaʻi ʻē aʻe o ka hoʻohana ʻana i nā antioxidants phenolic ʻo ia ka mālama ʻana i ka waihoʻoluʻu mua o nā polypolymers a hiki i ka ʻelemakule wela ʻoi aku ka maikaʻi ma mua o nā stabilizer paʻakai keleawe.
ʻAʻole emi ka wehe ʻana o ka polymer ma hope o ka ʻelemakule wela e like me kona mau ʻano mechanical.Hiki ke hoʻololi ʻia i loko o kahi manawa pōkole o ka makahiki, akā ʻaʻole e pili ka ikaika tensile elastic a me ka elongation o ka polymer a hiki i ka wā ma hope.
ʻO kahi nui o nā palapala e wehewehe ana i nā noi he nui o nā polyamides i hoʻoikaika ʻia i ke aniani-fiber i loko o ka ʻoihana kaʻa, e like me nā lau engine, nā pāpale radiator a me nā grilles, nā pahu a me nā mea hoʻokele mana hoʻokele, nā lima lima valve, nā kaila, nā mea hoʻopili uila a me nā hood.ʻO nā antioxidants Phenolic, ʻo ia wale nō a i hui pū ʻia me ka phosphite, ʻo ia nā mea hoʻopaʻa maikaʻi loa no GFR PA66.
ʻO ke kumu kumu o ka hui phenol + phosphite ʻo 1098 + 168, hiki ke hoʻohana ʻia i nā mahana hana haʻahaʻa ʻole i hoʻonui ʻia, a hoʻomaikaʻi ʻia ke kala extrusion.Eia nō naʻe, no nā ʻōnaehana polyamide e like me ke aniani fiber reinforcement, ʻoi aku ka kiʻekiʻe o ka mahana hana (kokoke i 300 °C), 168 kiʻekiʻe wela decomposition hemahema, i kēia manawa, hoʻohana nui mākou i ka 1098 + S9228 i ka hui pū ʻana o ke kūpaʻa mahana maikaʻi, ʻo ia hoʻi. ka mea hoʻohana nui loa i ka nylon wela wela.
Ma hope o nā hopena ho'āʻo systematic, ua ʻike ʻia ʻo 1098 + S9228 mau wahi no ka hoʻomaikaʻi ʻana i ka hoʻomaikaʻi ʻana o ka kala o ka nylon wela kiʻekiʻe, a ua hoʻokuʻu ʻo Sarex Chemical i nā huahana i hoʻonui ʻia SARAFOS 2628P5 (phosphorus-based auxiliary resistance) a me SARANOX PA2624 (hindered phenol and phosphite. hui pū ʻia) ʻoi aku ka maikaʻi o ka hana ma ka nylon kiʻekiʻe-mehana melemele, a ʻo nā ʻikepili hōʻike kūpono e like me kēia:
PA66, 270°C extrusion lehulehu a me ka hoao wela wela
| ■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 |
Ua hoʻoholo ʻia ka ʻikepili ma luna e ka Sarex Chemical Laboratory
Ke hoʻohālikelike ʻia me ka nui o ka hoʻohui ʻana o SARAFOS 2628P5 a me S9228, ʻoi aku ka maikaʻi o ke kala o ka extrusion lehulehu a me ka mālama ʻana i ka wela 120 °C no 12h, a ʻoi aku ka maikaʻi o ke kūpaʻa hydrolysis o ka huahana ponoʻī ma mua o ka S9228, nona ka noi maikaʻi. nā manaʻo i ka hoʻololi PA.
Ke loaʻa nā koi kiʻekiʻe no ka waihoʻoluʻu mua, ua ʻōlelo ʻia e hoʻohui i ka SARANOX PA2624, ma kahi o ka pauka palapala, hiki iā mākou ke hāʻawi aku i nā mea kūʻai aku me PA antioxidant masterbatches a me ka lawe ʻole ʻana i nā ʻāpana antioxidant, kahi kūpono e hoʻohui a hoʻopuehu, a kōkua. ʻo ka hale hana hana e lilo i lepo ʻole.
| PA66, extrusion lehulehu ma 270 °C | 0.1%1098+0.2%9228 | 0.1%1098+0.2%2628P5 | 0.3%PA2624 |
| 1 extrusion |  |  |  |
| 3 extrusions |  |  |  |
| 5 extrusions |  |  |  |
| E puhi i ka 120°C, 12h
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Ua hoʻoholo ʻia ka ʻikepili ma luna e ka Sarex Chemical Laboratory
Ka manawa hoʻouna: Nov-14-2022