{"product_id":"cssgpepihmpp","title":"HMPP (2-Hydroxy-2-methylpropiophenone, \u003e99%) as Photoinitiator for Solid-State \u0026 Gel Polymer Electrolyte, 100 g\/bottle, CSSGPEPIHMPP","description":"\u003cp\u003e2-Hydroxy-2-methylpropiophenone (HMPP) (commonly known under trade names like Darocur 1173) is a highly efficient Norrish Type I radical photoinitiator widely used for fabricating UV-cured gel polymer electrolytes (GPEs) in next-generation battery applications. Its primary advantage is its liquid state at room temperature, which allows it to mix effortlessly into liquid electrolyte\/monomer precursors without requiring additional volatile co-solvents. \u003c\/p\u003e\n\u003cp\u003eWhen exposed to UV radiation (typically absorbing strongly in the 230–340 nm range), HMPP undergoes homolytic cleavage (Norrish Type I reaction) at the a-carbon adjacent to the carbonyl group.\u003c\/p\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg height=\"48\" width=\"312\" style=\"margin-bottom: 16px; float: none;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0774\/6591\/1526\/files\/CSSGPEPIHMPP_reaction_pathway_480x480.jpg?v=1783318839\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: start;\"\u003eBoth Benzoyl and Ketyl Radicals resulting fragments act as highly reactive initiating radicals. These radicals attack the carbon-carbon double bonds of vinyl or acrylate-based monomers (e.g., PEGDA, ETPTA, DPHA) dissolved within the liquid electrolyte matrix, triggering a rapid, exothermic free-radical crosslinking network that traps the liquid electrolyte into a 3D gel framework.\u003c\/div\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: start;\"\u003eThe advantages of the HMPP photoinitiator for GPEs: (1) \u003cstrong\u003eExcellent Solvency\u003c\/strong\u003e: Being a liquid, HMPP dissolves seamlessly into polar carbonate solvents (EC, DEC, DMC) and ether-based glymes, avoiding the micro-segregation or undissolved particle defects often seen with solid initiators like Irgacure 2959 or BAPO. (2) \u003cstrong\u003eRapid Kinetics (In Situ Viability)\u003c\/strong\u003e: UV curing via HMPP typically takes anywhere from 5 seconds to 2 minutes under moderate intensity lamps (~ 20–100 mW\/cm2), making it highly practical for roll-to-roll (R2R) slot-die processing or in situ curing directly inside a sealed pouch cell or coin cell assembly before complete sealing. (3) \u003cstrong\u003eLow Volatility\u003c\/strong\u003e: High boiling point (~ 102-103 degress at 4 mmHg) ensures minimal vapor pressure during handling in dry rooms or Ar-filled gloveboxes.\u003c\/div\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003ctable width=\"100%\" style=\"width: 100%; height: 399.438px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 35.6px;\"\u003e\n\u003ctd style=\"width: 28.0576%; height: 35.6px;\"\u003e\u003cem\u003ePart Number\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 71.5827%; height: 35.6px;\"\u003e\n\u003cp\u003e\u003cspan\u003eCSSGPEPIHMPP (C-SSGPE-PI-HMPP)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 35.6px;\"\u003e\n\u003ctd style=\"width: 28.0576%; height: 35.6px;\"\u003e\u003cem\u003eCAS\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 71.5827%; height: 35.6px;\"\u003e\n\u003cp\u003e\u003cspan\u003e7473-98-5\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 117px;\"\u003e\n\u003ctd style=\"width: 28.0576%; height: 117px;\"\u003e\u003cem\u003eChemical Formula\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 71.5827%; height: 117px;\"\u003e\n\u003cp\u003e\u003cspan\u003eC\u003c\/span\u003e\u003csub\u003e6\u003c\/sub\u003e\u003cspan\u003eH\u003c\/span\u003e\u003csub\u003e5\u003c\/sub\u003e\u003cspan\u003eCOC(CH\u003c\/span\u003e\u003csub\u003e3\u003c\/sub\u003e\u003cspan\u003e)\u003c\/span\u003e\u003csub\u003e2\u003c\/sub\u003e\u003cspan\u003eOH\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg style=\"margin-bottom: 16px; float: none;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0774\/6591\/1526\/files\/CSSGPEPIHMPP_chemical_structure_100x100.jpg?v=1783318724\"\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 35.6px;\"\u003e\n\u003ctd style=\"width: 28.0576%; height: 35.6px;\"\u003e\u003cem\u003eAppearance\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 71.5827%; height: 35.6px;\"\u003e\n\u003cp\u003e\u003cspan\u003eColorless Liquid\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 35.6px;\"\u003e\n\u003ctd style=\"width: 28.0576%; height: 35.6px;\"\u003e\u003cem\u003eMolecular Weight\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 71.5827%; height: 35.6px;\"\u003e\n\u003cp\u003e\u003cspan\u003e164.20\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 35.6px;\"\u003e\n\u003ctd style=\"width: 28.0576%; height: 35.6px;\"\u003e\u003cem\u003eBoling Point\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 71.5827%; height: 35.6px;\"\u003e\n\u003cp\u003e\u003cspan\u003e102-103 °C\/4 mmHg (lit.)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.2px;\"\u003e\n\u003ctd style=\"width: 28.0576%; height: 39.2px;\"\u003e\u003cem\u003eDensity\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 71.5827%; height: 39.2px;\"\u003e\n\u003cp\u003e\u003cspan\u003e1.077 g\/mL at 25 °C (lit.)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 26.0375px;\"\u003e\n\u003ctd style=\"width: 28.0576%; height: 26.0375px;\"\u003e\u003cem\u003ePackage Size\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 71.5827%; height: 26.0375px;\"\u003e100 g\/bottle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eNotes\u003c\/strong\u003e: Please try to store the HMPP in a dry and dark side.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eReferences\u003c\/strong\u003e: \u003c\/span\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/onlinelibrary.wiley.com\/doi\/full\/10.1002\/mame.202500214\"\u003e\u003cspan\u003eF. U. Cengiz, et al. Advanced Flexible and Porous Gel Polymer Electrolytes Based on a Photocrosslinked Thiol-Ene\/Hydroxyethyl Cellulose Semi-Interpenetrating Polymer Network for Lithium-Ion Batteries, Macromolecular Materials and Engineering, 2025, 310, e00214\u003c\/span\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003ca href=\"https:\/\/link.springer.com\/article\/10.1007\/s11581-022-04621-4\"\u003eY. Gu, et al. A non-flammable, flexible and UV-cured gel polymer electrolyte with crosslinked polymer network for dendrite-suppressing lithium metal batteries, Ionics, 2022, 28, 3743–3759\u003c\/a\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"MKL","offers":[{"title":"Default Title","offer_id":47952117792998,"sku":"CSSGPEPIHMPP","price":79.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0774\/6591\/1526\/files\/CSSGPEPIHMPP_main.jpg?v=1783318724","url":"https:\/\/echemsupplies.com\/products\/cssgpepihmpp","provider":"EChem Supplies","version":"1.0","type":"link"}