{"id":407,"date":"2021-02-23T09:46:52","date_gmt":"2021-02-23T16:46:52","guid":{"rendered":"https:\/\/www.engr.colostate.edu\/organizations\/aiche\/?page_id=407"},"modified":"2021-03-26T23:12:32","modified_gmt":"2021-03-27T05:12:32","slug":"poster-competition","status":"publish","type":"post","link":"https:\/\/www.engr.colostate.edu\/organizations\/aiche\/2021\/02\/23\/poster-competition\/","title":{"rendered":"Poster Competition"},"content":{"rendered":"\t\t
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Poster Competition<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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Abstracts<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Learn about student research from a variety of different topics
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Brandon McReynolds, New Mexico Tech
Effects of Post-Processing on Thermo-Mechanical Properties of a 3D-Printed UV-Curable Polymer<\/a><\/p>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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The effect of UV and thermal processing on the properties of a UV-curable polymer fabricated with 3D printing was studied. The polymers studied were proprietary methacrylate based resins (Formlabs) and samples were printed directly in test geometries. Uniaxial compression tests at room temperature were performed for Young\u2019s modulus, Poisson\u2019s ratio, and yield stress. Thermal tests using a Differential Scanning Calorimeter (DSC) described the glass transition temperature range, physical aging and (additional) high-temperature reactions of the samples. Post-processing consisted of either additional UV exposure time or high temperature “soak” time (or both). These indicated that post-processing has a pronounced effect on the mechanical and thermal properties. Both aspects of post-processing (UV and high-T soaks) increase the yield stress, the modulus and the glass transition. Combining high-T soaks with additional UV exposure is particularly effective.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Catherine House, New Mexico Tech
Diglycidyl ether of bisphenol A (DGEBA) epoxy reacting with diethanolamine (DEA)<\/a><\/p>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Diglycidyl ether of bisphenol A (DGEBA) epoxy reacts with diethanolamine (DEA)
through a complex zwitterionic chain-growth reaction. This formulation has the advantages of<\/div>
1)\u00a0a ceiling temperature (reducing the risk of thermal runaway reactions);\u00a0<\/div>
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low toxicity;\u00a0<\/div>
3) a living polymerization that imparts a self-healing nature; and<\/div>
4) an acceptably\u00a0high Tg making it appropriate for engineering applications.<\/div>
In the present paper, the time and extent of cure at the gel point is found over a wide
range of temperatures. This builds on previous studies that provide gel point values at only a few\u00a0temperatures (65\u00b0C, 70\u00b0C and 90\u00b0C). Here, we extend this to 55\u00b0C to 160\u00b0C and find that the\u00a0extent of cure at the gel point to be 0.40\u00b10.05 for all cases. This agrees with theoretical\u00a0predictions if proton transfer is prevalent during the reaction which result in a step-growth-like\u00a0network structure. Finally, the gel point measurements are combined with prior glass transition\u00a0temperatures to produce a time-temperature-transformation diagram.\u00a0Techniques used are rheology, bubble viscometry, and micro-calorimetry. Theories used\u00a0were those of Carothers and of Flory-Stockmayer. Analysis of the shear moduli after being\u00a0reduced by their frequency power-law was found to give a better prediction of the gel point than\u00a0analysis of the moduli themselves.<\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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Poster Competition Abstracts Learn about student research from a variety of different topics Brandon McReynolds, New Mexico TechEffects of Post-Processing on Thermo-Mechanical Properties of a 3D-Printed UV-Curable Polymer The effect of UV and thermal processing on the properties of a UV-curable polymer fabricated with 3D printing was studied. The polymers studied were proprietary methacrylate based…Read more <\/a><\/p>\n","protected":false},"author":54,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"elementor_header_footer","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-407","post","type-post","status-publish","format-standard","hentry"],"yoast_head":"\nPoster Competition - American Institute of Chemical Engineers (AIChE)<\/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:\/\/www.engr.colostate.edu\/organizations\/aiche\/poster-competition\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Poster Competition - American Institute of Chemical Engineers (AIChE)\" \/>\n<meta property=\"og:description\" content=\"Poster Competition Abstracts Learn about student research from a variety of different topics Brandon McReynolds, New Mexico TechEffects of Post-Processing on Thermo-Mechanical Properties of a 3D-Printed UV-Curable Polymer The effect of UV and thermal processing on the properties of a UV-curable polymer fabricated with 3D printing was studied. 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