{"id":3332,"date":"2020-10-09T11:04:08","date_gmt":"2020-10-09T11:04:08","guid":{"rendered":"https:\/\/longchangchemical.com\/?p=3332"},"modified":"2026-04-28T10:41:47","modified_gmt":"2026-04-28T10:41:47","slug":"microwave-in-plastic-additives","status":"publish","type":"post","link":"https:\/\/longchangchemical.com\/fr\/microwave-in-plastic-additives\/","title":{"rendered":"L'effet de migration des micro-ondes sur les additifs plastiques"},"content":{"rendered":"<h4 class=\"wp-block-heading\">Le plastique est l'un des mat\u00e9riaux les plus fr\u00e9quemment rencontr\u00e9s dans la vie quotidienne. Il est tr\u00e8s appr\u00e9ci\u00e9 des consommateurs pour ses avantages : forme simple, faible prix, r\u00e9sistance aux solvants, r\u00e9sistance \u00e0 la corrosion et l\u00e9g\u00e8ret\u00e9. Cependant, les propri\u00e9t\u00e9s intrins\u00e8ques des mat\u00e9riaux polym\u00e8res ne peuvent pas r\u00e9pondre aux besoins des diff\u00e9rents sc\u00e9narios d'utilisation. C'est pourquoi, au cours du processus de production, diff\u00e9rents additifs sont ajout\u00e9s au plastique afin d'en am\u00e9liorer les performances.<\/h4>\n\n<!-- lc-qa-start -->\n<p><strong>Quick answer:<\/strong> For antioxidant, UV absorber, and HALS topics, formulators usually compare long-term protection, process stability, and color control together because those priorities do not always point to the same additive.<\/p>\n<!-- lc-qa-end -->\n\n\n\n\n\n\n<h4 class=\"wp-block-heading\">Les compos\u00e9s de petites mol\u00e9cules pr\u00e9sents dans les plastiques apparaissent principalement de deux mani\u00e8res :<\/h4>\n\n\n\n<h4 class=\"wp-block-heading\">1. Pour les mat\u00e9riaux polym\u00e8res obtenus par polym\u00e9risation par addition ou par condensation de monom\u00e8res, des initiateurs sont g\u00e9n\u00e9ralement ajout\u00e9s au cours du processus de polym\u00e9risation, et des traces d'initiateurs, de monom\u00e8res et d'autres compos\u00e9s mol\u00e9culaires de petite taille peuvent subsister dans les mat\u00e9riaux apr\u00e8s la polym\u00e9risation ;<\/h4>\n\n\n\n<h4 class=\"wp-block-heading\">2. Additifs ajout\u00e9s pour r\u00e9pondre \u00e0 certaines propri\u00e9t\u00e9s des plastiques pendant le moulage, tels que les plastifiants, les antioxydants, les retardateurs de flamme, les stabilisateurs de lumi\u00e8re, les charges inorganiques et d'autres compos\u00e9s mol\u00e9culaires de petite taille. Au fur et \u00e0 mesure que la dur\u00e9e d'utilisation augmente, certaines traces de petites mol\u00e9cules migrent dans le plastique, voire s'en \u00e9chappent, ce qui entra\u00eene une baisse des performances du produit plastique. Cette situation est plus susceptible de se produire en cas de chauffage, de micro-ondes, de haute pression et d'autres environnements.<\/h4>\n\n\n\n<h4 class=\"wp-block-heading\">Sous l'action des micro-ondes, la cha\u00eene de polym\u00e8res est mise en vibration sous l'effet du champ \u00e9lectromagn\u00e9tique alternatif, ce qui entra\u00eene la dissolution de ces petits compos\u00e9s mol\u00e9culaires et leur migration vers les aliments, l'air et les lignes de production. Lorsque la migration atteint un certain taux, elle peut affecter les performances du plastique. Il en r\u00e9sulte des ph\u00e9nom\u00e8nes dangereux.<\/h4>\n\n\n\n<h4 class=\"wp-block-heading\">\u00c0 l'heure actuelle, la Chine a peu \u00e9tudi\u00e9 la structure et le m\u00e9canisme de migration des compos\u00e9s qui jouent un r\u00f4le important dans le processus de migration. Ces derni\u00e8res ann\u00e9es, les chercheurs ont \u00e9tudi\u00e9 quatre compos\u00e9s de petites mol\u00e9cules courantes dans les plastiques (Butylated Hydroxytoluene, Antioxidant 168, <strong><a rel=\"noreferrer noopener\" href=\"https:\/\/longchangchemical.com\/fr\/product\/light-stabilizer-770-tinuvin-770-cas-52829-07-9\/\" target=\"_blank\"><span class=\"has-inline-color has-pale-cyan-blue-color\">Stabilisateur l\u00e9ger 770<\/span><\/a><\/strong>phtalate de dibutyle). ) Les r\u00e8gles de migration de cinq types de mat\u00e9riaux d'emballage en plastique (poly\u00e9thyl\u00e8ne PE, polypropyl\u00e8ne PP, polystyr\u00e8ne PS, polym\u00e9thacrylate de m\u00e9thyle PMMA et poly\u00e9thyl\u00e8ne t\u00e9r\u00e9phtalate) ont \u00e9t\u00e9 compar\u00e9es. Il convient de noter qu'afin de simuler des conditions extr\u00eames et de faciliter les essais, les travaux de recherche ont ajout\u00e9 des compos\u00e9s \u00e0 petites mol\u00e9cules \u00e0 cinq mat\u00e9riaux d'emballage en plastique \u00e0 une teneur de 1,00%, ce qui d\u00e9passe largement les rapports de concentration couramment utilis\u00e9s de ces compos\u00e9s, de sorte que les r\u00e9sultats mesur\u00e9s sont g\u00e9n\u00e9ralement trop importants et ne sont utilis\u00e9s que comme r\u00e9f\u00e9rence de tendance et n'expliquent pas l'exsudation r\u00e9elle.<\/h4>\n\n\n\n<h4 class=\"wp-block-heading\">La premi\u00e8re est une comparaison de la migration approximative de diff\u00e9rentes petites mol\u00e9cules dans diff\u00e9rents mat\u00e9riaux d'emballage. La figure ci-dessous montre les r\u00e9sultats de mobilit\u00e9 obtenus en chauffant \u00e0 une puissance de 500 W pendant 5 minutes. Il appara\u00eet clairement que les quatre substances migrent dans le PS et le PMMA. Le taux est sup\u00e9rieur \u00e0 la mobilit\u00e9 dans le PE, le PP et le PET.<\/h4>\n\n\n\n<h4 class=\"wp-block-heading\">En effet, les cha\u00eenes principales du PE, du PP et du PET pr\u00e9sentent une bonne sym\u00e9trie et des structures relativement r\u00e9guli\u00e8res, ce qui en fait des polym\u00e8res cristallins, tandis que le PS poss\u00e8de un anneau benz\u00e9nique avec un encombrement st\u00e9rique plus important dans sa cha\u00eene lat\u00e9rale, et que le PMMA poss\u00e8de un groupe ester polaire plus important dans sa cha\u00eene lat\u00e9rale. Il appartient au polym\u00e8re amorphe dans son ensemble, mais les r\u00e9gions cristallines et amorphes existent en m\u00eame temps dans le polym\u00e8re. Les compos\u00e9s \u00e0 petites mol\u00e9cules sont \u00e9galement r\u00e9partis dans les r\u00e9gions cristallines et amorphes du mat\u00e9riau lorsqu'ils sont form\u00e9s. Les segments de cha\u00eene de la r\u00e9gion amorphe des cristaux vibrent al\u00e9atoirement sous l'action du champ \u00e9lectromagn\u00e9tique alternatif, ce qui favorise la migration des compos\u00e9s mol\u00e9culaires de petite taille du polym\u00e8re.<\/h4>\n\n\n\n<h4 class=\"wp-block-heading\">On constate \u00e9galement que le taux de migration de l'antioxydant 168 et du <strong><a rel=\"noreferrer noopener\" href=\"https:\/\/longchangchemical.com\/fr\/product\/light-stabilizer-770-tinuvin-770-cas-52829-07-9\/\" target=\"_blank\"><span class=\"has-inline-color has-pale-cyan-blue-color\">stabilisateur de lumi\u00e8re 770<\/span><\/a><\/strong> dans tous les plastiques est inf\u00e9rieur \u00e0 celui des deux autres petites mol\u00e9cules, et le taux de migration de la HALS 770 dans le PE et le PP applicables n'est que d'environ 10%.<\/h4>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"652\" height=\"455\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/10\/1-2.png\" alt=\"\" class=\"wp-image-3333\" srcset=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/10\/1-2.png 652w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/10\/1-2-300x209.png 300w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/10\/1-2-600x419.png 600w\" sizes=\"(max-width: 652px) 100vw, 652px\" \/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">Pendant le temps de chauffage de 5 minutes, les courbes de mobilit\u00e9 des diff\u00e9rentes puissances de sortie des micro-ondes pour les quatre substances sont pr\u00e9sent\u00e9es dans la figure suivante. Les diagrammes ABCD montrent que le BHT, l'antioxydant 168, le HALS 770 et le DBP se trouvent dans 5 mat\u00e9riaux sous diff\u00e9rentes puissances de micro-ondes. Courbe de migration. Il est \u00e9vident qu'\u00e0 mesure que la puissance de sortie de Weibo augmente, la mobilit\u00e9 des diff\u00e9rents mat\u00e9riaux et la puissance de sortie sont fondamentalement lin\u00e9aires.<\/h4>\n\n\n\n<h4 class=\"wp-block-heading\">Cela s'explique par le fait que, sous le m\u00eame temps de chauffage, la puissance de sortie des micro-ondes est forte, les petites mol\u00e9cules se d\u00e9placent plus violemment dans le polym\u00e8re, ce qui acc\u00e9l\u00e8re \u00e9galement le mouvement des segments de polym\u00e8re dans la r\u00e9gion amorphe, acc\u00e9l\u00e9rant ainsi la migration des petites mol\u00e9cules dans le plastique. De m\u00eame, quelle que soit la puissance des micro-ondes, la mobilit\u00e9 des quatre mat\u00e9riaux est conforme \u00e0 la conclusion de l'\u00e9tape pr\u00e9c\u00e9dente, ce qui indique qu'il n'y a pas d'autre forme d'interaction entre les mat\u00e9riaux que le mouvement thermique.<\/h4>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"472\" height=\"755\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/10\/2-1-1-edited.png\" alt=\"\" class=\"wp-image-3335\" srcset=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/10\/2-1-1-edited.png 472w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/10\/2-1-1-edited-188x300.png 188w\" sizes=\"(max-width: 472px) 100vw, 472px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"476\" height=\"762\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/10\/2-2-edited.png\" alt=\"\" class=\"wp-image-3337\" srcset=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/10\/2-2-edited.png 476w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/10\/2-2-edited-187x300.png 187w\" sizes=\"(max-width: 476px) 100vw, 476px\" \/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Enfin, les chercheurs ont \u00e9tudi\u00e9 l'effet du temps d'action des micro-ondes sur la migration des substances chimiques dans les emballages en plastique. La puissance de sortie des micro-ondes \u00e9tait de 300 W. Les r\u00e9sultats sont pr\u00e9sent\u00e9s dans la figure ci-dessous. La figure montre qu'avec la m\u00eame puissance de sortie des micro-ondes, lorsque les quatre substances migrent dans chaque mat\u00e9riau, la mobilit\u00e9 est faible au d\u00e9but, elle augmente lin\u00e9airement et s'acc\u00e9l\u00e8re apr\u00e8s 2 minutes, et atteint la valeur maximale au bout de 6 \u00e0 7 minutes. Apr\u00e8s avoir atteint l'\u00e9quilibre, la mobilit\u00e9 reste fondamentalement inchang\u00e9e.<\/h4>\n\n\n\n<h4 class=\"wp-block-heading\">En effet, la migration des mat\u00e9riaux est un processus de diffusion, et la force motrice continue de la diffusion est la diff\u00e9rence de potentiel chimique entre le mat\u00e9riau d'emballage et l'aliment. Lorsque le potentiel chimique entre les deux phases est \u00e9gal, l'\u00e9quilibre est atteint. Pour l'antioxydant 168 et le HALS 770, la concentration finale d'\u00e9quilibre de l'exsudation n'est que de 25% m\u00eame dans le PS, c'est-\u00e0-dire que la teneur restante en additif est de 0,75%, ce qui d\u00e9passe encore l'utilisation de l'additif dans la plupart des cas.<\/h4>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>Par cons\u00e9quent, m\u00eame dans des conditions de micro-ondes intenses \u00e0 long terme, ces deux compos\u00e9s \u00e0 petites mol\u00e9cules peuvent encore maintenir une concentration efficace, ce qui est propice \u00e0 l'utilisation continue de dispositifs en plastique dans des conditions extr\u00eames.<\/strong><\/h4>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"560\" height=\"431\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/10\/3-2.png\" alt=\"\" class=\"wp-image-3338\" srcset=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/10\/3-2.png 560w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2020\/10\/3-2-300x231.png 300w\" sizes=\"(max-width: 560px) 100vw, 560px\" \/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">Dans l'ensemble, cette exp\u00e9rience a \u00e9tudi\u00e9 les quatre types de migrations contenant diff\u00e9rents groupes fonctionnels et polarit\u00e9s de BHT, d'antioxydant 168, de stabilisateur de lumi\u00e8re HALS 770 et de DBP sous diff\u00e9rentes conditions de puissance de chauffage par micro-ondes dans le PE, le PP, le PS, le PMMA et le PET. Type de mobilit\u00e9 dans le film plastique.<\/h4>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>Les r\u00e9sultats montrent que la mobilit\u00e9 des quatre substances est fondamentalement lin\u00e9aire avec la puissance de sortie des micro-ondes, et la mobilit\u00e9 des migrants dans le mat\u00e9riau amorphe est plus grande que celle dans le mat\u00e9riau cristallin dans les m\u00eames conditions, et lorsque les migrants et la cha\u00eene mol\u00e9culaire du polym\u00e8re Lorsque des liaisons hydrog\u00e8ne sont form\u00e9es, la r\u00e9sistance \u00e0 la migration peut \u00eatre augment\u00e9e ; sous la m\u00eame puissance de sortie des micro-ondes, lorsque les quatre substances migrent dans chaque mat\u00e9riau, la mobilit\u00e9 est faible au d\u00e9but, et elle commence \u00e0 augmenter lin\u00e9airement et s'acc\u00e9l\u00e8re apr\u00e8s 2 min, \u00e0 6 min~7 min la gauche et la droite atteignent la valeur maximale, puis atteignent l'\u00e9quilibre et restent fondamentalement inchang\u00e9es.<\/strong><\/h4>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>Parmi les quatre mat\u00e9riaux, l'antioxydant 168 et le <a href=\"https:\/\/longchangchemical.com\/fr\/product\/light-stabilizer-770-tinuvin-770-cas-52829-07-9\/\" target=\"_blank\" rel=\"noreferrer noopener\"><span class=\"has-inline-color has-pale-cyan-blue-color\">stabilisateur de lumi\u00e8re 770<\/span><\/a> ont un taux de migration plus faible, ce qui est b\u00e9n\u00e9fique pour l'ajout et l'utilisation.<\/strong><\/h4>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>Contactez-nous d\u00e8s maintenant !<\/strong><\/h4>\n\n\n\n<h4 class=\"wp-block-heading\">Nous acceptons les services personnalis\u00e9s. Nous vous contacterons g\u00e9n\u00e9ralement dans les 24 heures. Vous pouvez \u00e9galement m'envoyer un courriel <strong>info@longchangchemical.com<\/strong> pendant les heures de travail ( 8:30 am to 6:00 pm UTC+8 Mon.~Sat. ) ou utilisez le chat en direct du site web pour obtenir une r\u00e9ponse rapide.<\/h4>\n\n\n\n<h4 class=\"wp-block-heading\">Cet article a \u00e9t\u00e9 r\u00e9dig\u00e9 par Longchang Chemical R&amp;D Department. Si vous souhaitez le copier ou le r\u00e9imprimer, veuillez en indiquer la source.<\/h4>\n\n\n<!-- lc-commercial-start -->\n<h2>How buyers usually evaluate antioxidants and stabilizers<\/h2>\n<p>Most stabilizer decisions work best when they are treated as package decisions rather than single-product decisions. Technical buyers usually get the strongest answer by reviewing long-term heat aging, process stability, weather exposure, and color sensitivity together.<\/p>\n<ul>\n<li><strong>Separate processing protection from long-term stability:<\/strong> the best additive for melt history is not always the same one that gives the best service-life retention.<\/li>\n<li><strong>Use synergy deliberately:<\/strong> many polymer and coating systems perform best when primary and secondary stabilizers are paired intentionally.<\/li>\n<li><strong>Review color and clarity requirements:<\/strong> clear, pale, food-contact, or white systems often need a tighter package than dark industrial products.<\/li>\n<li><strong>Check the real aging condition:<\/strong> heat, UV, humidity, and outdoor exposure can each change which stabilizer route is commercially strongest.<\/li>\n<\/ul>\n<h3>Recommended product references<\/h3>\n<ul>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/fr\/product\/chlumiao-168-cas-31570-04-4\/\">CHLUMIAO 168<\/a>:<\/strong> A practical process-stability reference when hydroperoxide control matters.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/fr\/product\/chlumiao-1010-cas-6683-19-8\/\">CHLUMIAO 1010<\/a>:<\/strong> A widely used primary antioxidant benchmark for long-term thermal stability.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/fr\/product\/light-stabilizer-123-tinuvin-123-cas-129757-67-1\/\">CHLUMILS UV-123<\/a>:<\/strong> A strong HALS reference for weatherability-focused screens in coatings and polymers.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/fr\/product\/uv-5151-cas-104810-48-2\/\">CHLUMILS UV-5151<\/a>:<\/strong> A practical stabilizer-package reference when broader light-aging protection is needed.<\/li>\n<\/ul>\n<h3>FAQ for buyers and formulators<\/h3>\n<p><strong>Why are stabilizer packages often stronger than a single additive?<\/strong><br \/>Because different products can protect different parts of the degradation pathway, so the package often covers more risk than one grade alone.<\/p>\n<p><strong>Does adding more antioxidant or UV stabilizer always improve performance?<\/strong><br \/>Not necessarily. Over-dosing can increase cost and sometimes create side effects, so most systems perform best inside a tested dosage window.<\/p>\n<!-- lc-commercial-end -->","protected":false},"excerpt":{"rendered":"<p>Plastic is one of the most frequently encountered materials in daily life. It is deeply loved by consumers for its advantages of simple shape, low price, resistance to solvent, corrosion<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3332","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.3.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>The migration effect of microwave on plastic additives - Longchang Chemical<\/title>\n<meta name=\"description\" content=\"Plastic is one of the most frequently encountered materials in daily life. 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