{"id":770,"date":"2018-02-08T15:58:28","date_gmt":"2018-02-08T12:58:28","guid":{"rendered":"https:\/\/materialwizard.com.ua\/?p=770"},"modified":"2026-06-07T09:15:46","modified_gmt":"2026-06-07T06:15:46","slug":"pa-impact-modifier-mah-epdm-poe","status":"publish","type":"post","link":"https:\/\/materialwizard.com.ua\/en\/pa-impact-modifier-mah-epdm-poe\/","title":{"rendered":"Impact modifier for polyamides \u2014 MAH-grafted EPDM \/ POE"},"content":{"rendered":"<p><\/p>\n<h3>Description<\/h3>\n<p><strong>Impact modifier for polyamides<\/strong> from <strong>Material Wizard<\/strong> \u2014 a copolymer grafted with maleic anhydride (MAH-grafted EPDM, POE or PE) that effectively increases the impact strength and low-temperature performance of PA6, PA66, PA610 and PA12 polyamide compounds. The MAH functional groups react chemically with the terminal -NH\u2082 groups of the polyamide matrix, forming a <strong>rubber dispersed phase of 200\u2013500 nm<\/strong> \u2014 the optimal range for the craze-shear mechanism and maximum impact balance.<\/p>\n<h3>Brand mapping of global counterparts<\/h3>\n<ul>\n<li><strong>DuPont Fusabond\u00ae N493 \/ N525<\/strong> \u2014 MAH-grafted EPDM, the classic choice for PA toughening<\/li>\n<li><strong>Arkema Lotader\u00ae 3210 \/ 4720<\/strong> \u2014 E\/n-BA\/MAH terpolymer for PA, PBT, PET<\/li>\n<li><strong>Mitsui Tafmer\u00ae MH7020 \/ 5040<\/strong> \u2014 POE-g-MAH with narrow MWD<\/li>\n<li><strong>SK Functional Polymer Bondyram\u00ae 7103 \/ 7115<\/strong> \u2014 a price competitor to Fusabond<\/li>\n<li><strong>Lyondell Plexar\u00ae PX2049<\/strong> \u2014 PE-g-MAH for thin-walled parts<\/li>\n<\/ul>\n<h3>Mechanism of action and optimal phase size<\/h3>\n<p>The MAH group reacts with the -NH\u2082 end of the polyamide chain to form a covalent amide bond \u2014 this anchors the rubber at the phase boundary and prevents coalescence during processing. The end result is a stable dispersed morphology with rubber domain sizes of <strong>200\u2013500 nm<\/strong>:<\/p>\n<ul>\n<li><strong>&lt; 100 nm<\/strong> \u2014 insufficient for effective impact energy dissipation (rubber inclusions are too small)<\/li>\n<li><strong>200\u2013500 nm<\/strong> \u2014 the <strong>optimum<\/strong> for PA6\/PA66: triggers the craze-shear mechanism, 3\u20135x increase in notched Charpy<\/li>\n<li><strong>&gt; 1 \u03bcm<\/strong> \u2014 the rubber phase becomes too large, stiffness is lost and surface defects appear<\/li>\n<\/ul>\n<h3>Typical dosage and effect<\/h3>\n<ul>\n<li><strong>10\u201320 wt %<\/strong> in PA6\/PA66 \u2014 the optimal range<\/li>\n<li><strong>Notched Charpy @ 23 \u00b0C:<\/strong> increase from 5\u20138 kJ\/m\u00b2 (unmodified) to 25\u201360 kJ\/m\u00b2 (super-tough PA)<\/li>\n<li><strong>Notched Charpy @ -40 \u00b0C:<\/strong> increase from 2\u20133 to 15\u201330 kJ\/m\u00b2 (critical for arctic applications)<\/li>\n<li><strong>Tradeoff:<\/strong> 15\u201330 % reduction in tensile modulus; for GF-reinforced PA the reduction is less pronounced<\/li>\n<\/ul>\n<h3>Key markets<\/h3>\n<p><strong>Automotive:<\/strong> super-tough PA6\/PA66 for bumper brackets, airbag module housings, cold-snap latches, under-hood fasteners.<\/p>\n<p><strong>Power tools:<\/strong> impact-resistant housings for cordless drills, screwdrivers and hammer drills \u2014 withstand a 2 m drop onto concrete.<\/p>\n<p><strong>Sports industry:<\/strong> protective gear (hockey helmets, knee pads), bicycle pedals, ski bindings.<\/p>\n<p><strong>PA recycling:<\/strong> restoring the impact performance of recycled PA6 after thermo-oxidative degradation \u2014 5\u20138 % of the modifier restores 70\u201380 % of the original impact strength.<\/p>\n<h3>Limitations \u2014 honestly<\/h3>\n<ul>\n<li>Reduced stiffness and HDT \u2014 use GF-reinforced toughened PA for load-bearing structures<\/li>\n<li>Not for V-0 \/ V-2 applications without a separate FR additive<\/li>\n<li>Requires a twin-screw extruder with an adequate dispersion-mixing zone \u2014 a single-screw machine will not achieve the optimal domain size<\/li>\n<li>Not for food contact in the base formulation<\/li>\n<\/ul>\n<h3>Test methods<\/h3>\n<p>ISO 179-1eA (notched Charpy), ISO 180 (Izod), ASTM D5628 (instrumented impact), SEM microscopy for morphology verification (rubber domain size), DMA for the T_g of the rubber phase.<\/p>\n<p><em>The values indicated are measured using internal methods close to the corresponding ISO and GOST standards. This information is provided for reference only and does not constitute an official technical data sheet for a batch. Please request the TDS and MSDS for the specific batch and grade before industrial use.<\/em><\/p>\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>Description Impact modifier for polyamides from Material Wizard \u2014 a copolymer grafted with maleic anhydride (MAH-grafted EPDM, POE or PE) that effectively increases the impact strength and low-temperature performance of PA6, PA66, PA610 and PA12 polyamide compounds. The MAH functional groups react chemically with the terminal -NH\u2082 groups of the polyamide matrix, forming a rubber [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":636,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[39],"tags":[],"class_list":["post-770","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-impact-modifiers"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Impact Modifier for PA \u2014 MAH-grafted EPDM\/POE | MW<\/title>\n<meta name=\"description\" content=\"Impact modifier for PA6\/PA66\/PA610. MAH-grafted EPDM\/POE, Fusabond\/Lotader\/Tafmer analog. Rubber phase 200-500 nm, Charpy +3-5x. 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