{"id":6228,"date":"2023-09-06T11:15:35","date_gmt":"2023-09-06T11:15:35","guid":{"rendered":"https:\/\/longchangchemical.com\/?p=6228"},"modified":"2026-04-28T10:42:20","modified_gmt":"2026-04-28T10:42:20","slug":"what-are-their-plasticizing-principles","status":"publish","type":"post","link":"https:\/\/longchangchemical.com\/fr\/what-are-their-plasticizing-principles\/","title":{"rendered":"Quelle est la diff\u00e9rence entre la plastification interne et la plastification externe et quels sont leurs principes de plastification ?"},"content":{"rendered":"<h1><strong>Quelle est la diff\u00e9rence entre la plastification interne et la plastification externe et quels sont leurs principes de plastification ?<\/strong><\/h1>\n<p><!-- lc-qa-start --><\/p>\n<p><strong>Quick answer:<\/strong> UV monomers and oligomers are usually chosen by viscosity, adhesion, flexibility, shrinkage, and cure speed as a package. The most reliable formulas come from balancing those properties rather than maximizing only one.<\/p>\n<p><!-- lc-qa-end --><\/p>\n<p>La production de produits en plastique ne peut \u00eatre s\u00e9par\u00e9e de l'utilisation de plastifiants, car seule l'utilisation de r\u00e9sine PVC permet de produire des pi\u00e8ces en plastique dont le co\u00fbt est trop \u00e9lev\u00e9, et il est souvent n\u00e9cessaire d'obtenir une vari\u00e9t\u00e9 de performances diff\u00e9rentes dans le processus de production, et le m\u00e9lange avec diff\u00e9rents plastifiants peut atteindre cet objectif de \"r\u00e9duction des co\u00fbts et d'int\u00e9r\u00eat\", mais dans l'utilisation r\u00e9elle des plastifiants, en fonction de la forme de plastification divis\u00e9e en deux cas, la plastification interne et la plastification externe, la r\u00e9daction d'Aoshi a compil\u00e9 ici pour vous la diff\u00e9rence entre la plastification interne et la plastification externe et son principe de plastification, \u00e0 titre de r\u00e9f\u00e9rence.<\/p>\n<p>Premi\u00e8rement, la diff\u00e9rence entre la plastification interne et la plastification externe<\/p>\n<p>1, plastification interne<\/p>\n<p>La plastification interne est une m\u00e9thode de plastification chimique, due \u00e0 la combinaison chimique stable entre le second monom\u00e8re et les segments de la cha\u00eene polym\u00e8re, de sorte qu'elle n'est pas extraite par le milieu, mais du point de vue du processus et du co\u00fbt, la coh\u00e9sion du plastifiant interne est plus faible, l'utilisation de la temp\u00e9rature est plus \u00e9troite, et il doit \u00eatre ajout\u00e9 dans le processus de polym\u00e9risation, de sorte qu'il n'est g\u00e9n\u00e9ralement utilis\u00e9 que pour les produits en plastique l\u00e9g\u00e8rement flexibles.<br \/>\nPVC protection de l'environnement plastifiant externe<br \/>\n2\u3001Plastifiant externe<\/p>\n<p>La plastification externe est une m\u00e9thode de plastification physique, dont les performances sont plus compl\u00e8tes, qui est facile \u00e0 produire et \u00e0 utiliser et qui a un large \u00e9ventail d'applications, mais qui est facile \u00e0 migrer, \u00e0 se volatiliser et \u00e0 se perdre. La plupart des plastifiants externes couramment utilis\u00e9s sont des compos\u00e9s organiques esters, qui n'ont g\u00e9n\u00e9ralement pas de r\u00e9action chimique avec le polym\u00e8re, l'interaction avec le polym\u00e8re \u00e0 des temp\u00e9ratures \u00e9lev\u00e9es et le polym\u00e8re joue principalement le r\u00f4le de gonflement, puis avec le polym\u00e8re pour former une solution solide. Les plastifiants sont g\u00e9n\u00e9ralement appel\u00e9s plastifiants externes.<\/p>\n<p>Deuxi\u00e8mement, le principe de la plastification interne et de la plastification externe<\/p>\n<p>1, le principe de la plastification interne<\/p>\n<p>La plastification est l'introduction d'un monom\u00e8re dans le processus de polym\u00e9risation du second monom\u00e8re, en raison de la copolym\u00e9risation du second monom\u00e8re dans la structure mol\u00e9culaire du polym\u00e8re, d\u00e9truisant la cha\u00eene mol\u00e9culaire du polym\u00e8re du degr\u00e9 de r\u00e9gularit\u00e9, ce qui r\u00e9duit le degr\u00e9 de cristallinit\u00e9 du polym\u00e8re, r\u00e9duit les forces intermol\u00e9culaires, augmentant la plasticit\u00e9. Telles que la copolym\u00e9risation en bloc, la copolym\u00e9risation par greffage et d'autres m\u00e9thodes.<br \/>\nUn autre type de plastification interne est l'introduction de cha\u00eenes ramifi\u00e9es (ou de substituants ou de branches greff\u00e9es) dans la cha\u00eene mol\u00e9culaire du polym\u00e8re, et les cha\u00eenes ramifi\u00e9es peuvent r\u00e9duire la force cha\u00eene \u00e0 cha\u00eene du polym\u00e8re, augmentant ainsi la plasticit\u00e9 des pi\u00e8ces en plastique.<br \/>\nPlastifiants environnementaux \u00e0 base de P-ph\u00e9nyl\u00e8ne<br \/>\n2, principe de plastification externe<\/p>\n<p>La plastification externe se fait \u00e0 l'aide de certaines substances de faible poids mol\u00e9culaire ayant une capacit\u00e9 de solvatation, m\u00e9lang\u00e9es aux mol\u00e9cules de r\u00e9sine, augmentant la distance entre les mol\u00e9cules afin de r\u00e9duire la force gravitationnelle intermol\u00e9culaire de la r\u00e9sine, ce qui \u00e9quivaut \u00e0 l'utilisation de m\u00e9thodes m\u00e9caniques de coercition, dispers\u00e9es dans le polym\u00e8re devant \u00eatre plastifi\u00e9, et g\u00e9n\u00e9ralement elles ne r\u00e9agissent pas avec le polym\u00e8re, ne deviennent pas une partie des segments de la cha\u00eene polym\u00e8re. Le r\u00e9sultat de la plastification externe est une r\u00e9duction de la force gravitationnelle intermol\u00e9culaire, ce qui rend la r\u00e9sine plastifi\u00e9e souple et r\u00e9duit la temp\u00e9rature de traitement de la r\u00e9sine.<\/p>\n<h2><strong>Plastifiants ignifuges de la m\u00eame s\u00e9rie<\/strong><\/h2>\n<table style=\"border-collapse: collapse; width: 374.27pt;\" border=\"0\" width=\"499\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr style=\"height: 21.00pt;\">\n<td class=\"et2\" style=\"height: 21.00pt; width: 96.00pt;\" width=\"128\" height=\"28\"><a title=\"https:\/\/longchangchemical.com\/product\/cas-91082-17-6\/\" href=\"https:\/\/longchangchemical.com\/fr\/product\/cas-91082-17-6\/\"><span style=\"color: #00ccff;\">Lcflex\u00ae T-50<\/span><\/a><\/td>\n<td class=\"et3\" style=\"width: 159.75pt;\" width=\"213\">T-50 ; ASE<\/td>\n<td class=\"et3\" style=\"width: 118.50pt;\" width=\"158\">CAS 91082-17-6<\/td>\n<\/tr>\n<tr style=\"height: 21.00pt;\">\n<td class=\"et2\" style=\"height: 21.00pt; width: 96.00pt;\" width=\"128\" height=\"28\"><a title=\"https:\/\/longchangchemical.com\/product\/acetyl-tributyl-citrate-cas-77-90-7\/\" href=\"https:\/\/longchangchemical.com\/fr\/product\/acetyl-tributyl-citrate-cas-77-90-7\/\"><span style=\"color: #00ccff;\">Lcflex\u00ae ATBC<\/span><\/a><\/td>\n<td class=\"et3\" style=\"width: 159.75pt;\" width=\"213\">Citrate d'ac\u00e9tyle et de tributyle<\/td>\n<td class=\"et3\" style=\"width: 118.50pt;\" width=\"158\">CAS 77-90-7<\/td>\n<\/tr>\n<tr style=\"height: 21.00pt;\">\n<td class=\"et2\" style=\"height: 21.00pt; width: 96.00pt;\" width=\"128\" height=\"28\"><a title=\"https:\/\/longchangchemical.com\/product\/tributyl-citrate-tbc-cas-77-94-1\/\" href=\"https:\/\/longchangchemical.com\/fr\/product\/tributyl-citrate-tbc-cas-77-94-1\/\"><span style=\"color: #00ccff;\">Lcflex\u00ae TBC<\/span><\/a><\/td>\n<td class=\"et3\" style=\"width: 159.75pt;\" width=\"213\">Citrate de tributyle<\/td>\n<td class=\"et3\" style=\"width: 118.50pt;\" width=\"158\">CAS 77-94-1<\/td>\n<\/tr>\n<tr style=\"height: 21.00pt;\">\n<td class=\"et2\" style=\"height: 21.00pt; width: 96.00pt;\" width=\"128\" height=\"28\"><span style=\"color: #00ccff;\"><a style=\"color: #00ccff;\" title=\"https:\/\/longchangchemical.com\/product\/tcpp-cas-13674-84-5\/\" href=\"https:\/\/longchangchemical.com\/fr\/product\/tcpp-cas-13674-84-5\/\">Lcflex\u00ae TCPP<\/a><\/span><\/td>\n<td class=\"et3\" style=\"width: 159.75pt;\" width=\"213\">TCPP ignifuge<\/td>\n<td class=\"et3\" style=\"width: 118.50pt;\" width=\"158\">CAS 13674-84-5<\/td>\n<\/tr>\n<tr style=\"height: 21.00pt;\">\n<td class=\"et2\" style=\"height: 21.00pt; width: 96.00pt;\" width=\"128\" height=\"28\"><a title=\"https:\/\/longchangchemical.com\/product\/dotp-cas-6422-86-2\/\" href=\"https:\/\/longchangchemical.com\/fr\/product\/dotp-cas-6422-86-2\/\"><span style=\"color: #00ccff;\">Lcflex\u00ae DOTP<\/span><\/a><\/td>\n<td class=\"et3\" style=\"width: 159.75pt;\" width=\"213\">T\u00e9r\u00e9phtalate de dioctyle<\/td>\n<td class=\"et3\" style=\"width: 118.50pt;\" width=\"158\">CAS 6422-86-2<\/td>\n<\/tr>\n<tr style=\"height: 21.00pt;\">\n<td class=\"et2\" style=\"height: 21.00pt; width: 96.00pt;\" width=\"128\" height=\"28\"><span style=\"color: #00ccff;\"><a style=\"color: #00ccff;\" title=\"https:\/\/longchangchemical.com\/product\/diethyl-phthalate-dep-cas-84-66-2\/\" href=\"https:\/\/longchangchemical.com\/fr\/product\/diethyl-phthalate-dep-cas-84-66-2\/\">Lcflex\u00ae DEP<\/a><\/span><\/td>\n<td class=\"et3\" style=\"width: 159.75pt;\" width=\"213\">Phtalate de di\u00e9thyle<\/td>\n<td class=\"et3\" style=\"width: 118.50pt;\" width=\"158\">CAS 84-66-2<\/td>\n<\/tr>\n<tr style=\"height: 21.00pt;\">\n<td class=\"et2\" style=\"height: 21.00pt; width: 96.00pt;\" width=\"128\" height=\"28\"><span style=\"color: #00ccff;\"><a style=\"color: #00ccff;\" title=\"https:\/\/longchangchemical.com\/product\/triethyl-citrate-cas-77-93-0\/\" href=\"https:\/\/longchangchemical.com\/fr\/product\/triethyl-citrate-cas-77-93-0\/\">Lcflex\u00ae TEC<\/a><\/span><\/td>\n<td class=\"et3\" style=\"width: 159.75pt;\" width=\"213\">citrate de tri\u00e9thyle<\/td>\n<td class=\"et3\" style=\"width: 118.50pt;\" width=\"158\">CAS 77-93-0<\/td>\n<\/tr>\n<tr style=\"height: 21.00pt;\">\n<td class=\"et2\" style=\"height: 21.00pt; width: 96.00pt;\" width=\"128\" height=\"28\"><span style=\"color: #00ccff;\"><a style=\"color: #00ccff;\" title=\"https:\/\/longchangchemical.com\/product\/Lcflare-doa-cas-123-79-5\/\" href=\"https:\/\/longchangchemical.com\/fr\/product\/Lcflare-doa-cas-123-79-5\/\">Lcflex\u00ae DOA<\/a><\/span><\/td>\n<td class=\"et3\" style=\"width: 159.75pt;\" width=\"213\">Adipate de dioctyle<\/td>\n<td class=\"et3\" style=\"width: 118.50pt;\" width=\"158\">CAS 123-79-5<\/td>\n<\/tr>\n<tr style=\"height: 30.00pt;\">\n<td class=\"et2\" style=\"height: 30.00pt; width: 96.00pt;\" width=\"128\" height=\"40\"><span style=\"color: #00ccff;\"><a style=\"color: #00ccff;\" title=\"https:\/\/longchangchemical.com\/product\/Lcflare-dos-cas-2432-87-3\/\" href=\"https:\/\/longchangchemical.com\/fr\/product\/Lcflare-dos-cas-2432-87-3\/\">Lcflex\u00ae DOS<\/a><\/span><\/td>\n<td class=\"et3\" style=\"width: 159.75pt;\" width=\"213\">ESTER DE DI-N-OCTYLE DE L'ACIDE S\u00c9BACIQUE<\/td>\n<td class=\"et3\" style=\"width: 118.50pt;\" width=\"158\">CAS 2432-87-3<\/td>\n<\/tr>\n<tr style=\"height: 27.00pt;\">\n<td class=\"et2\" style=\"height: 27.00pt; width: 96.00pt;\" width=\"128\" height=\"36\"><a title=\"https:\/\/longchangchemical.com\/product\/cas-28553-12-0-685-15-48-0\/\" href=\"https:\/\/longchangchemical.com\/fr\/product\/cas-28553-12-0-685-15-48-0\/\"><span style=\"color: #00ccff;\">Lcflex\u00ae DINP<\/span><\/a><\/td>\n<td class=\"et3\" style=\"width: 159.75pt;\" width=\"213\">Phtalate de diisononyle<\/td>\n<td class=\"et3\" style=\"width: 118.50pt;\" width=\"158\">CAS 28553-12-0\/685 15-48-0<\/td>\n<\/tr>\n<tr style=\"height: 21.00pt;\">\n<td class=\"et2\" style=\"height: 21.00pt; width: 96.00pt;\" width=\"128\" height=\"28\"><span style=\"color: #00ccff;\"><a style=\"color: #00ccff;\" title=\"https:\/\/longchangchemical.com\/product\/tmp-cas-77-99-6\/\" href=\"https:\/\/longchangchemical.com\/fr\/product\/tmp-cas-77-99-6\/\">Lcflex\u00ae TMP<\/a><\/span><\/td>\n<td class=\"et3\" style=\"width: 159.75pt;\" width=\"213\">Trim\u00e9thylolpropane<\/td>\n<td class=\"et3\" style=\"width: 118.50pt;\" width=\"158\">CAS 77-99-6<\/td>\n<\/tr>\n<tr style=\"height: 13.50pt;\">\n<td class=\"et2\" style=\"height: 13.50pt; width: 96.00pt;\" width=\"128\" height=\"18\"><span style=\"color: #00ccff;\"><a style=\"color: #00ccff;\" title=\"https:\/\/longchangchemical.com\/product\/triethyl-phosphate-tep-cas-78-40-0\/\" href=\"https:\/\/longchangchemical.com\/fr\/product\/triethyl-phosphate-tep-cas-78-40-0\/\">Lcflex\u00ae TEP<\/a><\/span><\/td>\n<td class=\"et3\" style=\"width: 159.75pt;\" width=\"213\">Phosphate de tri\u00e9thyle<\/td>\n<td class=\"et3\" style=\"width: 118.50pt;\" width=\"158\">CAS 78-40-0<\/td>\n<\/tr>\n<tr style=\"height: 13.50pt;\">\n<td class=\"et4\" style=\"height: 13.50pt; width: 96.00pt;\" width=\"128\" height=\"18\"><a href=\"https:\/\/longchangchemical.com\/fr\/product\/Lcflex-totm-cas-3319-31-1\/\"><span style=\"color: #00ccff;\">Lcflex\u00ae TOTM<\/span><\/a><\/td>\n<td class=\"et3\" style=\"width: 159.75pt;\" width=\"213\">Trioctyl trimellitate<\/td>\n<td class=\"et3\" style=\"width: 118.50pt;\" width=\"158\">CAS 3319-31-1<\/td>\n<\/tr>\n<tr style=\"height: 40.50pt;\">\n<td class=\"et4\" style=\"height: 40.50pt; width: 96.00pt;\" width=\"128\" height=\"54\"><a href=\"https:\/\/longchangchemical.com\/fr\/product\/Lcflex-bbp\/\"><span style=\"color: #00ccff;\">Lcflex\u00ae BBP<\/span><\/a><\/td>\n<td class=\"et3\" style=\"width: 159.75pt;\" width=\"213\">Plastifiants biosourc\u00e9s, plastifiant \u00e0 haut rendement<\/td>\n<td class=\"et3\" style=\"width: 118.50pt;\" width=\"158\"><\/td>\n<\/tr>\n<tr style=\"height: 13.50pt;\">\n<td class=\"et4\" style=\"height: 13.50pt; width: 96.00pt;\" width=\"128\" height=\"18\"><a href=\"https:\/\/longchangchemical.com\/fr\/product\/tmp-cas-77-99-6\/\"><span style=\"color: #00ccff;\">Lcflex\u00ae TMP<\/span><\/a><\/td>\n<td class=\"et3\" style=\"width: 159.75pt;\" width=\"213\">Trim\u00e9thylol propane<\/td>\n<td class=\"et3\" style=\"width: 118.50pt;\" width=\"158\">CAS 77-99-6<\/td>\n<\/tr>\n<tr style=\"height: 30.00pt;\">\n<td class=\"et2\" style=\"height: 30.00pt; width: 96.00pt;\" width=\"128\" height=\"40\"><a title=\"https:\/\/longchangchemical.com\/product\/sinopszr-tcep-cas-115-96-8\/\" href=\"https:\/\/longchangchemical.com\/fr\/product\/sinopszr-tcep-cas-115-96-8\/\"><span style=\"color: #00ccff;\">Lcflare\u00ae TCEP<\/span><\/a><\/td>\n<td class=\"et3\" style=\"width: 159.75pt;\" width=\"213\">Phosphate de tris(2-chloro\u00e9thyle)<\/td>\n<td class=\"et3\" style=\"width: 118.50pt;\" width=\"158\">CAS 115-96-8<\/td>\n<\/tr>\n<tr style=\"height: 30.00pt;\">\n<td class=\"et2\" style=\"height: 30.00pt; width: 96.00pt;\" width=\"128\" height=\"40\"><span style=\"color: #00ccff;\"><a style=\"color: #00ccff;\" title=\"https:\/\/longchangchemical.com\/product\/Lcflare-bdp\/\" href=\"https:\/\/longchangchemical.com\/fr\/product\/Lcflare-bdp\/\">Lcflare\u00ae BDP<\/a><\/span><\/td>\n<td class=\"et3\" style=\"width: 159.75pt;\" width=\"213\">Bisph\u00e9nol-A bis(phosphate de diph\u00e9nyle)<\/td>\n<td class=\"et3\" style=\"width: 118.50pt;\" width=\"158\">CAS 5945-33-5<\/td>\n<\/tr>\n<tr style=\"height: 13.50pt;\">\n<td class=\"et2\" style=\"height: 13.50pt; width: 96.00pt;\" width=\"128\" height=\"18\"><span style=\"color: #00ccff;\"><a style=\"color: #00ccff;\" title=\"https:\/\/longchangchemical.com\/product\/Lcflare-tpp-cas-115-86-6\/\" href=\"https:\/\/longchangchemical.com\/fr\/product\/Lcflare-tpp-cas-115-86-6\/\">Lcflare\u00ae TPP<\/a><\/span><\/td>\n<td class=\"et3\" style=\"width: 159.75pt;\" width=\"213\">Phosphate de triph\u00e9nyle<\/td>\n<td class=\"et3\" style=\"width: 118.50pt;\" width=\"158\">CAS 115-86-6<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2><\/h2>\n<h2><strong>Contactez-nous d\u00e8s maintenant !<\/strong><\/h2>\n<h4><strong><b>Si vous avez besoin du prix des plastifiants, veuillez remplir vos coordonn\u00e9es dans le formulaire ci-dessous, nous vous contacterons g\u00e9n\u00e9ralement dans les 24 heures. Vous pouvez \u00e9galement m'envoyer un courriel <span style=\"color: #0000ff;\"><a style=\"color: #0000ff;\" href=\"mailto:info@longchangchemical.com\">info@longchangchemical.com<\/a><\/span> 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.<\/b><\/strong><\/h4>\n<p><!-- lc-commercial-start --><\/p>\n<h2>How buyers usually evaluate UV monomers and resin systems<\/h2>\n<p>Most successful UV formulations are built by choosing the backbone first and then tuning the reactive monomer package around the substrate, cure method, and end-use stress. That usually produces a more stable result than choosing materials by viscosity or price alone.<\/p>\n<ul>\n<li><strong>Start from the final property target:<\/strong> hardness, flexibility, adhesion, and shrinkage rarely point to exactly the same raw-material package.<\/li>\n<li><strong>Screen the reactive package as a whole:<\/strong> oligomer, monomer, and photoinitiator choices interact strongly in UV systems.<\/li>\n<li><strong>Use viscosity as a tool, not the only decision rule:<\/strong> the easiest-processing material is not always the one that performs best after cure.<\/li>\n<li><strong>Check the real substrate:<\/strong> plastic, metal, label film, gel systems, and coatings can reward very different polarity and cure-density balances.<\/li>\n<\/ul>\n<h3>Recommended product references<\/h3>\n<ul>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/fr\/product\/acetyl-tributyl-citrate-cas-77-90-7\/\">CHLUMIFLEX ATBC<\/a>:<\/strong> A practical non-phthalate plasticizer reference for application and compliance screens.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/fr\/product\/dotp-cas-6422-86-2\/\">CHLUMIFLEX DOTP<\/a>:<\/strong> A standard terephthalate-plasticizer benchmark in flexible-plastics applications.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/fr\/product\/dbp-dibutyl-phthalate-cas-84-74-2\/\">CHLUMIFLEX DBP<\/a>:<\/strong> A conventional plasticizer comparison point in broader plasticizer discussions.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/fr\/product\/iboa-monomer-cas-5888-33-5\/\">CHLUMICRYL IBOA<\/a>:<\/strong> A strong low-viscosity monomer reference when hardness and good flow both matter.<\/li>\n<\/ul>\n<h3>FAQ for buyers and formulators<\/h3>\n<p><strong>Can one UV monomer or resin solve every formulation problem?<\/strong><br \/>Usually no. Commercially strong formulas depend on how several components work together to balance cure, adhesion, flow, and durability.<\/p>\n<p><strong>Why should monomers be screened together with oligomers?<\/strong><br \/>Because monomers can change viscosity, cure rate, shrinkage, and substrate behavior enough to alter the final ranking of the same backbone resin.<\/p>\n<p><!-- lc-commercial-end --><\/p>","protected":false},"excerpt":{"rendered":"<p>The production of plastic products can not be separated from the use of plasticizers, because only the use of PVC resin production of plastic parts of the cost is too<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[148],"tags":[],"class_list":["post-6228","post","type-post","status-publish","format-standard","hentry","category-plasticizer"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.3.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>What is the difference between internal and external plasticizing and what are their plasticizing principles? 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