{"id":6852,"date":"2024-04-22T07:28:15","date_gmt":"2024-04-22T07:28:15","guid":{"rendered":"https:\/\/longchangchemical.com\/?p=6852"},"modified":"2024-04-22T07:28:15","modified_gmt":"2024-04-22T07:28:15","slug":"how-to-solve-the-problem-of-discolouration-of-produced-plastic-products","status":"publish","type":"post","link":"https:\/\/longchangchemical.com\/hu\/how-to-solve-the-problem-of-discolouration-of-produced-plastic-products\/","title":{"rendered":"Hogyan oldhat\u00f3 meg a gy\u00e1rtott m\u0171anyag term\u00e9kek elsz\u00ednez\u0151d\u00e9s\u00e9nek probl\u00e9m\u00e1ja?"},"content":{"rendered":"

Hogyan oldhat\u00f3 meg a gy\u00e1rtott m\u0171anyag term\u00e9kek elsz\u00ednez\u0151d\u00e9s\u00e9nek probl\u00e9m\u00e1ja?<\/strong><\/h1>\n

\u25cf A m\u0171anyag term\u00e9kek sz\u00ednez\u00e9s\u00e9n\u00e9l, p\u00e9ld\u00e1ul a sz\u00ednez\u0151porok vagy a mesterkever\u00e9kek haszn\u00e1lat\u00e1val, el\u0151fordulhat a sz\u00ednv\u00e1ltoz\u00e1s jelens\u00e9ge, ami befoly\u00e1solhatja a term\u00e9k min\u0151s\u00e9g\u00e9t.<\/p>\n

A sz\u00ednv\u00e1ltoz\u00e1s lehets\u00e9ges okai:<\/p>\n

(1) Az alapgyanta oxidat\u00edv boml\u00e1sa okozza a magas h\u0151m\u00e9rs\u00e9klet\u0171 form\u00e1z\u00e1s sor\u00e1n;<\/p>\n

(2) A m\u0171anyag term\u00e9kek egyes \u00f6sszetev\u0151i, p\u00e9ld\u00e1ul az alap \u00e9s a seg\u00e9danyag, vagy az alap \u00e9s a sz\u00ednez\u0151 pigment, vagy a seg\u00e9danyag \u00e9s a pigment k\u00f6z\u00f6tti k\u00e9miai reakci\u00f3 miatt;<\/p>\n

(3) A magas h\u0151m\u00e9rs\u00e9kletnek nem ellen\u00e1ll\u00f3 sz\u00ednez\u0151 pigment vagy adal\u00e9kanyagok \u00e1ltal okozott, \u00e9s \u00edgy tov\u00e1bb.<\/p>\n

Az eml\u00edtett t\u00e9nyez\u0151k \u00e1ltal okozott sz\u00ednv\u00e1ltoz\u00e1s mechanizmus\u00e1nak elemz\u00e9s\u00e9vel a k\u00f6vetkez\u0151kben a m\u0171anyagterm\u00e9k-gy\u00e1rt\u00f3k sz\u00e1m\u00e1ra ny\u00fajtunk hivatkoz\u00e1si alapot, hogy helyesen v\u00e1lassz\u00e1k ki a nyersanyagokat, \u00e9s min\u0151s\u00edtett m\u0171anyagterm\u00e9keket \u00e1ll\u00edtsanak el\u0151.<\/p>\n

-A m\u0171anyag form\u00e1z\u00e1si folyamat \u00e1ltal okozott sz\u00ednv\u00e1ltoz\u00e1s<\/p>\n

1. Az alapgyanta oxidat\u00edv leboml\u00e1sa \u00e9s elsz\u00ednez\u0151d\u00e9se a magas h\u0151m\u00e9rs\u00e9klet\u0171 form\u00e1z\u00e1s sor\u00e1n.<\/p>\n

Ha a m\u0171anyag \u00f6nt\u0151berendez\u00e9s f\u0171t\u0151gy\u0171r\u0171je vagy f\u0171t\u0151lemeze nem szab\u00e1lyozhat\u00f3 \u00e9s mindig f\u0171t\u00e9si \u00e1llapotban van, k\u00f6nnyen okozhat t\u00fal magas helyi h\u0151m\u00e9rs\u00e9kletet, \u00edgy a gyanta oxidat\u00edv boml\u00e1sa magas h\u0151m\u00e9rs\u00e9kleten t\u00f6rt\u00e9nik, a h\u0151\u00e9rz\u00e9keny m\u0171anyagok, p\u00e9ld\u00e1ul a PVC stb. eset\u00e9ben val\u00f3sz\u00edn\u0171bb, hogy ez a jelens\u00e9g megjelenik az \u00f6nt\u00e9si folyamat sor\u00e1n, \u00e9s amikor komolyan megt\u00f6rt\u00e9nik, akkor \u00e9gett \u00e9s s\u00e1rg\u00e1v\u00e1 vagy ak\u00e1r feket\u00e9v\u00e9 v\u00e1lik, \u00e9s nagysz\u00e1m\u00fa alacsony molekul\u00e1j\u00fa ill\u00e9kony anyag t\u00e1vozik.<\/p>\n

Ez a lebont\u00e1s mag\u00e1ban foglalja a depolimeriz\u00e1ci\u00f3t, a v\u00e9letlenszer\u0171 l\u00e1ncbont\u00e1st, az oldalcsoportok \u00e9s alacsony molekulat\u00f6megek elt\u00e1vol\u00edt\u00e1s\u00e1t \u00e9s egy\u00e9b reakci\u00f3kat.<\/p>\n

 <\/p>\n

(1) Depolimeriz\u00e1ci\u00f3<\/p>\n

Depolimeriz\u00e1ci\u00f3s reakci\u00f3 el\u0151sz\u00f6r a makromolekula v\u00e9g\u00e9n a sz\u00fcnet, majd a l\u00e1nc mechanizmusa szerint gyorsan elt\u00e1vol\u00edtani a monomer, a polimeriz\u00e1ci\u00f3 a fels\u0151 hat\u00e1r\u00e9rt\u00e9k feletti h\u0151m\u00e9rs\u00e9klet polimeriz\u00e1ci\u00f3ja k\u00fcl\u00f6n\u00f6sen k\u00f6nnyen elv\u00e9gezhet\u0151.<\/p>\n

 <\/p>\n

(2) V\u00e9letlenszer\u0171 l\u00e1nct\u00f6r\u00e9s (degrad\u00e1ci\u00f3)<\/p>\n

A polimerek, mint p\u00e9ld\u00e1ul a PE \u00e9s m\u00e1s polimerek magas h\u0151m\u00e9rs\u00e9kleten t\u00f6rt\u00e9n\u0151 form\u00e1z\u00e1sa eset\u00e9n a f\u0151 l\u00e1nc b\u00e1rmelyik poz\u00edci\u00f3ban megszakadhat, a molekulat\u00f6meg gyorsan cs\u00f6kken, de a monomer hozam nagyon kicsi, ezt a fajta reakci\u00f3t v\u00e9letlenszer\u0171 l\u00e1nct\u00f6r\u00e9snek, n\u00e9ha degrad\u00e1ci\u00f3nak is nevezik, a szabad gy\u00f6k\u00f6k k\u00e9pz\u0151d\u00e9s\u00e9nek polietil\u00e9n l\u00e1nct\u00f6r\u00e9se nagyon akt\u00edv, nagysz\u00e1m\u00fa m\u00e1sodlagos hidrog\u00e9nnel k\u00f6r\u00fclv\u00e9ve, k\u00f6nny\u0171 l\u00e1nc\u00e1tad\u00e1si reakci\u00f3, szinte nincs monomer gener\u00e1ci\u00f3.<\/p>\n

 <\/p>\n

(3) Szubsztituensek elt\u00e1vol\u00edt\u00e1sa<\/p>\n

Polivinil-klorid, polivinil-acet\u00e1t, poliakrilnitril, polifluor-etil\u00e9n stb. Meleg\u00edt\u00e9s hat\u00e1s\u00e1ra a szubsztituenscsoport elt\u00e1vol\u00edt\u00e1sra ker\u00fcl. Polyvinil-klorid (PVC), p\u00e9ld\u00e1ul PVC feldolgoz\u00e1sa \u00f6nt\u00e9s a h\u0151m\u00e9rs\u00e9klet alatt 180 ~ 200 \u2103, de alacsonyabb h\u0151m\u00e9rs\u00e9kleten (p\u00e9ld\u00e1ul 100 ~ 120 \u2103), azaz a kezdete dehidrog\u00e9nez\u00e9s (HCl), 200 \u2103 k\u00f6r\u00fcl a vesztes\u00e9g HCl nagyon gyorsan, \u00fagy, hogy a polimer egy s\u00f6t\u00e9t sz\u00edn\u0171, az er\u0151ss\u00e9ge az alacsonyabb, a teljes reakci\u00f3 r\u00f6viden a k\u00f6vetkez\u0151k\u00e9ppen \u00edrhat\u00f3 le: ~ ~ ~ CH2CHCICH2CHCl ~ \u2192 \u2192 \u2192 ~ CH=CHCH=CH \uff5e+2HCl<\/p>\n

A szabad HCl katalitikus hat\u00e1ssal van a hidrog\u00e9n-klorid, a f\u00e9mkloridok, p\u00e9ld\u00e1ul a hidrog\u00e9n-klorid \u00e9s a vas-kloridot alkot\u00f3 feldolgoz\u00f3 berendez\u00e9sek elt\u00e1vol\u00edt\u00e1s\u00e1ra, a katalitikus hat\u00e1s el\u0151seg\u00edt\u00e9s\u00e9re: 3HCl + Fe \u2192 FeCl3 + 3HCl<\/p>\n

A h\u0151kezel\u00e9s sor\u00e1n a PVC-hez a stabilit\u00e1s jav\u00edt\u00e1sa \u00e9rdek\u00e9ben n\u00e9h\u00e1ny sz\u00e1zal\u00e9k savabszorber, p\u00e9ld\u00e1ul b\u00e1rium-sztear\u00e1t, szerves \u00f3n, \u00f3lomvegy\u00fcletek stb. adhat\u00f3.<\/p>\n

A kommun\u00e1lis t\u00e1vk\u00f6zl\u00e9si k\u00e1belek t\u00e1vk\u00f6zl\u00e9si k\u00e1belvezet\u00e9kekkel t\u00f6rt\u00e9n\u0151 sz\u00ednez\u00e9s\u00e9n\u00e9l a r\u00e9zvezet\u0151n l\u00e9v\u0151 poliolefinr\u00e9teg nem stabiliz\u00e1l\u00f3dik j\u00f3l, \u00e9s a polimer-r\u00e9z hat\u00e1rfel\u00fcleten z\u00f6ld r\u00e9zkarboxil\u00e1t k\u00e9pz\u0151dik. Ezek a reakci\u00f3k el\u0151seg\u00edtik a r\u00e9z diff\u00fazi\u00f3j\u00e1t a polimerbe, \u00e9s felgyors\u00edtj\u00e1k a r\u00e9z katalitikus oxid\u00e1ci\u00f3j\u00e1t.<\/p>\n

Ez\u00e9rt a poliolefinek oxidat\u00edv degrad\u00e1ci\u00f3j\u00e1nak cs\u00f6kkent\u00e9se \u00e9rdek\u00e9ben gyakran adnak hozz\u00e1 fenolos vagy arom\u00e1s amin antioxid\u00e1nsokat (AH), amelyek megsz\u00fcntetik a fenti reakci\u00f3t, az inakt\u00edv A-gy\u00f6k k\u00e9pz\u0151d\u00e9s\u00e9t: ROO- + AH - \u2192 ROOH + A-<\/p>\n

 <\/p>\n

(4) Oxidat\u00edv lebont\u00e1s<\/p>\n

A polimerek a feldolgoz\u00e1s \u00e9s a felhaszn\u00e1l\u00e1s sor\u00e1n a leveg\u0151 oxig\u00e9nj\u00e9nek vannak kit\u00e9ve, \u00e9s az oxidat\u00edv leboml\u00e1s felgyorsul, ha h\u0151 hat\u00e1s\u00e1ra a polimerek h\u0151nek vannak kit\u00e9ve.<\/p>\n

A poliolefinek termikus oxid\u00e1ci\u00f3ja az autokatalitikus viselked\u00e9s\u0171 szabadgy\u00f6k-l\u00e1ncreakci\u00f3 mechanizmus\u00e1hoz tartozik, amely h\u00e1rom l\u00e9p\u00e9sre oszthat\u00f3: a beindul\u00e1s, a n\u00f6veked\u00e9s \u00e9s a befejez\u00e9s.<\/p>\n

A hidroperoxid-csoport \u00e1ltal okozott l\u00e1ncszakad\u00e1s a molekulat\u00f6meg cs\u00f6kken\u00e9s\u00e9hez vezet, \u00e9s a homolitikus hasad\u00e1s f\u0151 term\u00e9kei alkoholok, aldehidek, ketonok, v\u00e9g\u00fcl karbonsavakk\u00e1 oxid\u00e1l\u00f3dnak. A karbonsav a f\u00e9mkataliz\u00e1lt oxid\u00e1ci\u00f3ban j\u00e1tszik f\u0151szerepet.<\/p>\n

 <\/p>\n

2. A m\u0171anyag form\u00e1z\u00e1s \u00e9s feldolgoz\u00e1s sor\u00e1n a sz\u00ednez\u0151anyag a magas h\u0151m\u00e9rs\u00e9klet-t\u0171r\u00e9s miatt lebomlik \u00e9s elsz\u00ednez\u0151dik.<\/p>\n

A m\u0171anyagok sz\u00ednez\u00e9s\u00e9hez haszn\u00e1lt pigmentek vagy sz\u00ednez\u00e9kek h\u0151m\u00e9rs\u00e9klet-ellen\u00e1ll\u00f3s\u00e1gi hat\u00e1r\u00e9rt\u00e9kkel rendelkeznek, amikor a h\u0151m\u00e9rs\u00e9klet el\u00e9ri ezt a hat\u00e1r\u00e9rt\u00e9ket, a pigmentek vagy sz\u00ednez\u00e9kek k\u00e9miai v\u00e1ltoz\u00e1sokon mennek kereszt\u00fcl, k\u00fcl\u00f6nb\u00f6z\u0151 alacsonyabb molekulat\u00f6meg\u0171 vegy\u00fcletek keletkeznek, amelyek reakci\u00f3k\u00e9plete bonyolultabb; a k\u00fcl\u00f6nb\u00f6z\u0151 pigmentek k\u00fcl\u00f6nb\u00f6z\u0151 reakci\u00f3kkal \u00e9s term\u00e9kekkel rendelkeznek, \u00e9s a k\u00fcl\u00f6nb\u00f6z\u0151 pigmentek h\u0151m\u00e9rs\u00e9klet-ellen\u00e1ll\u00f3s\u00e1g\u00e1t a s\u00falyvesztes\u00e9g \u00e9s m\u00e1s analitikai m\u00f3dszerek seg\u00edts\u00e9g\u00e9vel lehet kimutatni.<\/p>\n

-A sz\u00ednv\u00e1ltoz\u00e1st a sz\u00ednez\u0151anyag \u00e9s a gyanta k\u00f6z\u00f6tti reakci\u00f3 okozza.<\/p>\n

A sz\u00ednez\u0151anyag \u00e9s a gyanta k\u00f6z\u00f6tti reakci\u00f3 els\u0151sorban n\u00e9h\u00e1ny pigmentben vagy sz\u00ednez\u00e9kben \u00e9s gyant\u00e1ban nyilv\u00e1nul meg feldolgoz\u00e1s \u00e9s form\u00e1z\u00e1s sor\u00e1n, ezek a k\u00e9miai reakci\u00f3k a sz\u00ednf\u00e1zis megv\u00e1ltoz\u00e1s\u00e1hoz \u00e9s a polimer leboml\u00e1s\u00e1hoz vezetnek, \u00edgy a term\u00e9kek teljes\u00edtm\u00e9nye megv\u00e1ltozik.<\/p>\n

1.redukci\u00f3s reakci\u00f3<\/p>\n

Bizonyos polimerek, mint p\u00e9ld\u00e1ul a nejlon \u00e9s amino m\u0171anyagok olvadt \u00e1llapotban, egy nagyon er\u0151s savas reduk\u00e1l\u00f3szer, akkor lehet, hogy a feldolgoz\u00e1si h\u0151m\u00e9rs\u00e9klet nagyon stabil pigmentek vagy sz\u00ednez\u00e9kek cs\u00f6kken, hogy elhalv\u00e1nyul.<\/p>\n

2. L\u00fagcsere hat\u00e1sa<\/p>\n

A PVC emulzi\u00f3s polimerben vagy n\u00e9h\u00e1ny stabiliz\u00e1lt polipropil\u00e9nben l\u00e9v\u0151 alk\u00e1lif\u00f6ldf\u00e9mek \"l\u00fagcser\u00e9t\" v\u00e9gezhetnek a sz\u00ednez\u0151anyagban l\u00e9v\u0151 alk\u00e1lif\u00f6ldf\u00e9mekkel, \u00edgy a sz\u00edn k\u00e9k-v\u00f6r\u00f6sr\u0151l narancss\u00e1rg\u00e1ra v\u00e1ltozik.<\/p>\n

PVC emulzi\u00f3s polimer VC az emulge\u00e1l\u00f3szer (mint p\u00e9ld\u00e1ul a n\u00e1trium-dodecil-szulf\u00e1t C12H25SO3Na) vizes oldatban a kever\u00e9ses polimeriz\u00e1ci\u00f3s m\u00f3dszer seg\u00edts\u00e9g\u00e9vel, a reakci\u00f3 Na +; annak \u00e9rdek\u00e9ben, hogy jav\u00edtsa a h\u0151 \u00e9s az oxig\u00e9n teljes\u00edtm\u00e9nye PP, gyakran hozz\u00e1adott 1010, DLTDP \u00e9s m\u00e1s antioxid\u00e1nsok, antioxid\u00e1nsok 1010 egy tercier-butil 3,5 a 4 hidroxi-prop\u00e1nsav metil-\u00e9szter \u00e9s n\u00e1trium-pentaeritritol kataliz\u00e1lt \u00e9sztercsere reakci\u00f3. A DLTDP-t Na2S vizes oldat \u00e9s akrilnitril reakci\u00f3j\u00e1val \u00e1ll\u00edtj\u00e1k el\u0151, hogy tiodipropionitrilt kapjanak, hidroliz\u00e1lva tiodipropionsavat, v\u00e9g\u00fcl lauril-alkohollal \u00e9szterezik, a reakci\u00f3 Na+ -t is tartalmaz.<\/p>\n

M\u0171anyag term\u00e9kek form\u00e1z\u00e1sakor a gyant\u00e1ban marad\u00f3 Na+ reakci\u00f3ba l\u00e9p a f\u00e9mionokat tartalmaz\u00f3 sz\u00ednkiv\u00e1laszt\u00f3 pigmenttel, mint p\u00e9ld\u00e1ul a C.I.Pigment-Red48:2 (BBC vagy 2BP): XCa2++2Na+\u21922XNa++Ca2+.<\/p>\n

3. Reakci\u00f3 a pigment \u00e9s a hidrog\u00e9n-halogenid (HX) k\u00f6z\u00f6tt<\/p>\n

A PVC dekonjug\u00e1l\u00f3dik HCI-v\u00e9, \u00e9s konjug\u00e1lt kett\u0151s k\u00f6t\u00e9seket k\u00e9pez, ha a h\u0151m\u00e9rs\u00e9klet 170 \u00b0C-ra emelkedik, vagy f\u00e9ny hat\u00e1s\u00e1ra.<\/p>\n

A halog\u00e9ntartalm\u00fa \u00e9g\u00e9sg\u00e1tl\u00f3 poliolefin vagy sz\u00ednes \u00e9g\u00e9sg\u00e1tl\u00f3 m\u0171anyag term\u00e9kek magas h\u0151m\u00e9rs\u00e9kleten t\u00f6rt\u00e9n\u0151 fr\u00f6ccs\u00f6nt\u00e9se sor\u00e1n szint\u00e9n hidrog\u00e9n HX dehalog\u00e9nezett.<\/p>\n

(1) Az ultramarin \u00e9s a HX k\u00f6z\u00f6tti reakci\u00f3<\/p>\n

Az ultramarin pigment, amelyet sz\u00e9les k\u00f6rben haszn\u00e1lnak m\u0171anyagok sz\u00ednez\u00e9s\u00e9re vagy a s\u00e1rga f\u00e9ny megsz\u00fcntet\u00e9s\u00e9re, egy k\u00e9ntartalm\u00fa komplex.<\/p>\n

(2) A r\u00e9z pigment felgyors\u00edtja a PVC-gyanta oxidat\u00edv boml\u00e1s\u00e1t.<\/p>\n

A r\u00e9z pigment magas h\u0151m\u00e9rs\u00e9kleten Cu+ \u00e9s Cu2+ oxid\u00e1l\u00f3dhat, ami felgyors\u00edtja a PVC boml\u00e1s\u00e1t.<\/p>\n

(3) A f\u00e9mionok rombol\u00f3 hat\u00e1sa a polimerre<\/p>\n

Egyes pigmentek rombol\u00f3 hat\u00e1ssal vannak a polimerekre, mint p\u00e9ld\u00e1ul a mang\u00e1n pigment C.I.PigmentRed48:4 nem alkalmas a PP m\u0171anyag term\u00e9kek form\u00e1z\u00e1s\u00e1ra, ennek oka abban rejlik, hogy a v\u00e1ltoz\u00f3 valenci\u00e1j\u00fa f\u00e9m mang\u00e1nionjai kataliz\u00e1lj\u00e1k a hidroperoxidok boml\u00e1s\u00e1t az elektronok \u00e1tad\u00e1s\u00e1val a PP termikus oxid\u00e1ci\u00f3j\u00e1ban vagy fotooxid\u00e1ci\u00f3j\u00e1ban, ami a PP gyors\u00edtott \u00f6reged\u00e9s\u00e9hez vezet; a polikarbon\u00e1t \u00e9szterk\u00f6t\u00e9se k\u00f6nnyen hidroliz\u00e1l\u00f3dik, ha meleg\u00edtik \u00e9s lebomlik a l\u00fagok el\u0151tt, \u00e9s a f\u00e9mionok k\u00f6nnyebben el\u0151seg\u00edtik a boml\u00e1st, ha pigmentben vannak; a f\u00e9mionok k\u00f6nnyebben el\u0151seg\u00edtik a boml\u00e1st. Ha a pigmentben f\u00e9mionok vannak, k\u00f6nnyebben el\u0151seg\u00edti a boml\u00e1st; a f\u00e9mionok el\u0151seg\u00edtik a PVC \u00e9s m\u00e1s gyant\u00e1k termo-oxidat\u00edv boml\u00e1s\u00e1t is, \u00e9s sz\u00ednv\u00e1ltoz\u00e1sokhoz vezetnek.<\/p>\n

\u00d6sszefoglalva, ez a legmegval\u00f3s\u00edthat\u00f3bb \u00e9s leghat\u00e9konyabb m\u00f3dja annak, hogy a m\u0171anyag term\u00e9kek gy\u00e1rt\u00e1sa sor\u00e1n elker\u00fclj\u00fck a gyant\u00e1val reakci\u00f3ba l\u00e9p\u0151 sz\u00ednez\u0151anyag haszn\u00e1lat\u00e1t.<\/p>\n

-A sz\u00ednez\u0151anyagok \u00e9s a seg\u00e9danyagok k\u00f6z\u00f6tti reakci\u00f3<\/p>\n

1\u3001K\u00e9ntartalm\u00fa pigment \u00e9s seg\u00e9danyagok k\u00f6z\u00f6tti reakci\u00f3<\/p>\n

A k\u00e9ntartalm\u00fa pigmentek, mint p\u00e9ld\u00e1ul a kadmiums\u00e1rga (CdS \u00e9s CdSe szil\u00e1rd oldata), nem haszn\u00e1lhat\u00f3k PVC-ben a gyenge sav\u00e1ll\u00f3s\u00e1g miatt, \u00e9s nem haszn\u00e1lhat\u00f3k \u00f3lomtartalm\u00fa seg\u00e9danyagokkal egy\u00fctt.<\/p>\n

2\u3001Az \u00f3lomtartalm\u00fa vegy\u00fcletek \u00e9s a k\u00e9ntartalm\u00fa stabiliz\u00e1torok k\u00f6z\u00f6tti reakci\u00f3<\/p>\n

Kr\u00f3ms\u00e1rga pigment vagy molibd\u00e9n kr\u00f3mv\u00f6r\u00f6s az \u00f3lomkomponensben \u00e9s antioxid\u00e1ns, p\u00e9ld\u00e1ul tiodisztear\u00e1t DSTDP reakci\u00f3.<\/p>\n

3\u3001Reakci\u00f3 a pigment \u00e9s az antioxid\u00e1ns k\u00f6z\u00f6tt<\/p>\n

Az antioxid\u00e1nst tartalmaz\u00f3 gyant\u00e1ban, mint p\u00e9ld\u00e1ul a PP, n\u00e9h\u00e1ny pigment \u00e9s antioxid\u00e1ns is reakci\u00f3ba l\u00e9p, \u00edgy gyeng\u00edti az antioxid\u00e1ns funkci\u00f3j\u00e1t, \u00e9s a gyanta h\u0151- \u00e9s oxig\u00e9nstabilit\u00e1sa rosszabb lesz.<\/p>\n

P\u00e9ld\u00e1ul a fenolos antioxid\u00e1ns k\u00f6nnyen felsz\u00edv\u00f3dik a korom \u00e1ltal, vagy reakci\u00f3ba l\u00e9p vele, \u00e9s elvesz\u00edti aktivit\u00e1s\u00e1t; a fenolos antioxid\u00e1ns \u00e9s a tit\u00e1nion fenolos arom\u00e1s komplexet k\u00e9pez feh\u00e9r vagy vil\u00e1gos sz\u00edn\u0171 m\u0171anyag term\u00e9kekben, ami a term\u00e9kek s\u00e1rgul\u00e1s\u00e1t eredm\u00e9nyezi; a feh\u00e9r pigment (TiO2) sz\u00ednv\u00e1ltoz\u00e1s\u00e1t megfelel\u0151 antioxid\u00e1ns kiv\u00e1laszt\u00e1s\u00e1val vagy seg\u00e9danyagok, p\u00e9ld\u00e1ul cink sav\u00e1ll\u00f3 s\u00f3 (cink-sztear\u00e1t) vagy P2-t\u00edpus\u00fa foszfit hozz\u00e1ad\u00e1s\u00e1val megakad\u00e1lyozhatjuk.<\/p>\n

4\u3001Reakci\u00f3 a pigment \u00e9s a f\u00e9nystabiliz\u00e1tor k\u00f6z\u00f6tt<\/p>\n

Amikor a pigment \u00e9s a f\u00e9nystabiliz\u00e1tor reakci\u00f3ba l\u00e9p, a kor\u00e1bban eml\u00edtett k\u00e9ntartalm\u00fa pigment \u00e9s a nikkeltartalm\u00fa f\u00e9nystabiliz\u00e1tor k\u00f6z\u00f6tti reakci\u00f3 mellett ez \u00e1ltal\u00e1noss\u00e1gban cs\u00f6kkenti a f\u00e9nystabiliz\u00e1tor hat\u00e1s\u00e1t. K\u00fcl\u00f6n\u00f6sen akkor, ha az akad\u00e1lyoz\u00f3 amin f\u00e9nystabiliz\u00e1tor \u00e9s az azo s\u00e1rga \u00e9s v\u00f6r\u00f6s pigment szerepe befoly\u00e1solja, a f\u00e9nystabiliz\u00e1l\u00f3 hat\u00e1s m\u00e9g nyilv\u00e1nval\u00f3bban cs\u00f6kken, \u00e9s nem olyan j\u00f3, mint a sz\u00edntelen stabiliz\u00e1l\u00f3 hat\u00e1s, \u00e9s jelenleg nincs pontos magyar\u00e1zat erre a jelens\u00e9gre.<\/p>\n

-A seg\u00e9deszk\u00f6z\u00f6k k\u00f6z\u00f6tti reakci\u00f3<\/p>\n

Ha sok seg\u00e9danyagot helytelen\u00fcl haszn\u00e1lnak, v\u00e1ratlan reakci\u00f3 l\u00e9phet fel, \u00e9s a term\u00e9kek sz\u00edne megv\u00e1ltozhat. P\u00e9ld\u00e1ul az \u00e9g\u00e9sg\u00e1tl\u00f3 Sb2O3 reakci\u00f3ba l\u00e9p a k\u00e9nnel, \u00e9s Sb2S3 keletkezik: Sb2O3+-S-\u2192Sb2S3+-O-.<\/p>\n

Ez\u00e9rt a gy\u00e1rt\u00e1si k\u00e9plet figyelembev\u00e9telekor a seg\u00e9danyagokat gondosan kell kiv\u00e1lasztani.<\/p>\n

-Az adal\u00e9kanyagok \u00f6noxid\u00e1ci\u00f3ja miatti sz\u00ednv\u00e1ltoz\u00e1s<\/p>\n

A fenolos stabiliz\u00e1torok \u00f6noxid\u00e1ci\u00f3ja fontos t\u00e9nyez\u0151 a feh\u00e9r vagy vil\u00e1gos sz\u00edn\u0171 term\u00e9kek sz\u00ednv\u00e1ltoz\u00e1s\u00e1nak el\u0151seg\u00edt\u00e9s\u00e9ben, amit k\u00fclf\u00f6ld\u00f6n gyakran \"r\u00f3zsasz\u00ednesed\u00e9snek\" (v\u00f6r\u00f6ses) neveznek.<\/p>\n

Az oxid\u00e1ci\u00f3s term\u00e9kek, mint p\u00e9ld\u00e1ul a BHT antioxid\u00e1ns (2-6-di-terc-butil-4-metilfenol), \u00e9s a 3,3\u2032,5,5\u2032 homostilbene kinon f\u00e9nyv\u00f6r\u00f6s reakci\u00f3term\u00e9kk\u00e9nt alakult ki, ez a fajta elsz\u00ednez\u0151d\u00e9s csak oxig\u00e9n \u00e9s v\u00edz jelenl\u00e9t\u00e9ben \u00e9s f\u00e9ny hi\u00e1ny\u00e1ban fordul el\u0151, ultraibolya f\u00e9nynek val\u00f3 kitetts\u00e9g, f\u00e9nyv\u00f6r\u00f6s homostilbene kinon gyorsan bomlik s\u00e1rga monociklusos term\u00e9kk\u00e9.<\/p>\n

-A sz\u00ednez\u0151 pigmentek sz\u00ednv\u00e1ltoz\u00e1sa f\u00e9ny \u00e9s h\u0151 hat\u00e1s\u00e1ra<\/p>\n

F\u00e9ny \u00e9s h\u0151 hat\u00e1s\u00e1ra egyes sz\u00ednez\u0151 pigmentek molekul\u00e1ris konfigur\u00e1ci\u00f3ja izomerizmusba v\u00e1ltozik, p\u00e9ld\u00e1ul a C.I.Pig.R2(BBC) pigment haszn\u00e1lata azo-t\u00edpusb\u00f3l kinon-t\u00edpus\u00fav\u00e1 v\u00e1ltozik, ami megv\u00e1ltoztatja az eredeti konjug\u00e1ci\u00f3s hat\u00e1st, \u00e9s a konjug\u00e1lt k\u00f6t\u00e9s cs\u00f6kken\u00e9s\u00e9t okozza, \u00e9s a sz\u00edn s\u00f6t\u00e9tk\u00e9k-v\u00f6r\u00f6sr\u0151l vil\u00e1gos narancsv\u00f6r\u00f6sre v\u00e1ltozik.<\/p>\n

Ugyanakkor a f\u00e9ny katalitikus hat\u00e1s\u00e1ra a v\u00edzzel egy\u00fctt bomlik, ami a ko-krist\u00e1lyos v\u00edzben v\u00e1ltoz\u00e1sokat \u00e9s halv\u00e1nyod\u00e1st okoz.<\/p>\n

-A l\u00e9gk\u00f6ri szennyez\u0151 anyagok \u00e1ltal okozott sz\u00ednv\u00e1ltoz\u00e1s<\/p>\n

A m\u0171anyag term\u00e9kek t\u00e1rol\u00e1sakor vagy haszn\u00e1latakor egyes reakt\u00edv csoportok, f\u00fcggetlen\u00fcl a gyant\u00e1t\u00f3l vagy adal\u00e9kanyagokt\u00f3l, illetve a sz\u00ednez\u0151 pigmentekt\u0151l, a f\u00e9ny \u00e9s a h\u0151 hat\u00e1s\u00e1ra k\u00f6lcs\u00f6nhat\u00e1sba l\u00e9pnek a nedvess\u00e9ggel vagy a l\u00e9gk\u00f6rben l\u00e9v\u0151 k\u00e9miai szennyez\u0151 anyagokkal, p\u00e9ld\u00e1ul savakkal \u00e9s l\u00fagokkal, k\u00fcl\u00f6nb\u00f6z\u0151 \u00f6sszetett k\u00e9miai reakci\u00f3kat okozva, amelyek hossz\u00fa t\u00e1von elsz\u00ednez\u0151d\u00e9shez vagy elsz\u00ednez\u0151d\u00e9shez vezetnek.<\/p>\n

Megfelel\u0151 h\u0151- \u00e9s oxig\u00e9nstabiliz\u00e1torok, f\u00e9nystabiliz\u00e1torok hozz\u00e1ad\u00e1s\u00e1val, illetve kiv\u00e1l\u00f3 min\u0151s\u00e9g\u0171 id\u0151j\u00e1r\u00e1s\u00e1ll\u00f3 adal\u00e9kanyagok \u00e9s pigmentek kiv\u00e1laszt\u00e1s\u00e1val ez a helyzet elker\u00fclhet\u0151 vagy m\u00e9rs\u00e9kelhet\u0151.<\/p>","protected":false},"excerpt":{"rendered":"

Hogyan oldhat\u00f3 meg a gy\u00e1rtott m\u0171anyag term\u00e9kek elsz\u00ednez\u0151d\u00e9s\u00e9nek probl\u00e9m\u00e1ja? \u25cf A m\u0171anyag term\u00e9kek sz\u00ednez\u00e9sekor olyan m\u00f3dszerekkel, mint a sz\u00ednez\u0151porok vagy masterbatchek, el\u0151fordulhat a sz\u00ednv\u00e1ltoz\u00e1s jelens\u00e9ge, ami befoly\u00e1solja a term\u00e9k min\u0151s\u00e9g\u00e9t. A sz\u00ednv\u00e1ltoz\u00e1s lehets\u00e9ges okai: (1) Az alapgyanta oxidat\u00edv leboml\u00e1sa okozza a magas h\u0151m\u00e9rs\u00e9klet\u0171 form\u00e1z\u00e1s sor\u00e1n; [...]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[117],"tags":[],"class_list":["post-6852","post","type-post","status-publish","format-standard","hentry","category-soresyn-resin"],"yoast_head":"\nHow to solve the problem of discolouration of produced plastic products? - Longchang Chemical<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/longchangchemical.com\/hu\/how-to-solve-the-problem-of-discolouration-of-produced-plastic-products\/\" \/>\n<meta property=\"og:locale\" content=\"hu_HU\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to solve the problem of discolouration of produced plastic products? - Longchang Chemical\" \/>\n<meta property=\"og:description\" content=\"How to solve the problem of discolouration of produced plastic products? \u25cf When colouring plastic products using methods such as colour powders or masterbatches, the phenomenon of colour change may occur, thus affecting the quality of the product. 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Possible causes of colour change: (1) Caused by oxidative degradation of the base resin during high-temperature moulding; […]","og_url":"https:\/\/longchangchemical.com\/hu\/how-to-solve-the-problem-of-discolouration-of-produced-plastic-products\/","og_site_name":"Longchang Chemical","article_published_time":"2024-04-22T07:28:15+00:00","og_image":[{"width":1000,"height":1000,"url":"https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/02\/logo-jpeg.jpg","type":"image\/jpeg"}],"author":"Longchang Chemical","twitter_card":"summary_large_image","schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/longchangchemical.com\/how-to-solve-the-problem-of-discolouration-of-produced-plastic-products\/#article","isPartOf":{"@id":"https:\/\/longchangchemical.com\/how-to-solve-the-problem-of-discolouration-of-produced-plastic-products\/"},"author":{"name":"Longchang Chemical","@id":"https:\/\/longchangchemical.com\/#\/schema\/person\/ecb1ad846136c6f1ca534b62978c6a8e"},"headline":"How to solve the problem of discolouration of produced plastic products?","datePublished":"2024-04-22T07:28:15+00:00","mainEntityOfPage":{"@id":"https:\/\/longchangchemical.com\/how-to-solve-the-problem-of-discolouration-of-produced-plastic-products\/"},"wordCount":1896,"publisher":{"@id":"https:\/\/longchangchemical.com\/#organization"},"articleSection":["Soresyn Resin"],"inLanguage":"hu"},{"@type":"WebPage","@id":"https:\/\/longchangchemical.com\/how-to-solve-the-problem-of-discolouration-of-produced-plastic-products\/","url":"https:\/\/longchangchemical.com\/how-to-solve-the-problem-of-discolouration-of-produced-plastic-products\/","name":"Hogyan oldhat\u00f3 meg a gy\u00e1rtott m\u0171anyag term\u00e9kek elsz\u00ednez\u0151d\u00e9s\u00e9nek probl\u00e9m\u00e1ja? 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