{"398741":{"#nid":"398741","#data":{"type":"event","title":"PhD Defense by Tom Wyatt","body":[{"value":"\u003Cp\u003EPTFE PhD Defense - Tom Wyatt\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003EDate: April 30, 2015\u003C\/p\u003E\u003Cp\u003ETime: 1:05 PM\u003C\/p\u003E\u003Cp\u003ELocation: MRDC 4404\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003ECommittee:\u003C\/p\u003E\u003Cp\u003EDr. Donggang Yao, MSE\u0026nbsp;(Advisor)\u003C\/p\u003E\u003Cp\u003EDr. Yulin Deng, ChBE\u003C\/p\u003E\u003Cp\u003EDr. Anselm Griffin, MSE\u003C\/p\u003E\u003Cp\u003EDr. Satish Kumar, MSE\u0026nbsp;\u003C\/p\u003E\u003Cp\u003EDr. Youjiang Wang, MSE\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003ETitle:\u003C\/p\u003E\u003Cp\u003EOligomer spin-solvent gel-fiber spinning\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003EAbstract:\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003ESuccessful processing of polymer molecules into well oriented fiber structures with minimal defects is difficult because the thermodynamically favorable state is a random coil, and molecular relaxation perpetually opposes efforts to extend and orient polymer molecules. This dissertation introduces the oligomer spin-solvent approach for gel-spinning high-strength fibers from many polymers with different chemistries. The theory is applied to two semi-crystalline, linear polymers without significant hydrogen bonding interactions: polyoxymethylene (POM) and polyethylene oxide (PEO). The resulting fibers are among the strongest POM and PEO fibers ever created. The efficiency of the gel-spinning process is increased through a mechanical solvent extraction method. By exploiting the unique solid-like behavior of the gel-fiber network, this work demonstrates that the spin-solvent can be separated from the gel-fiber by mechanically deforming the gel-network instead of chemically through an extraction solvent. A relatively safe and efficient gel-spinning process based on mechanical spin-solvent extraction is demonstrated using ultra-high molecular weight polyethylene.\u003C\/p\u003E\u003Cp\u003E \u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Oligomer spin-solvent gel-fiber spinning"}],"uid":"27707","created_gmt":"2015-04-23 12:43:10","changed_gmt":"2016-10-08 02:11:50","author":"Tatianna Richardson","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2015-04-30T14:00:00-04:00","event_time_end":"2015-04-30T16:00:00-04:00","event_time_end_last":"2015-04-30T16:00:00-04:00","gmt_time_start":"2015-04-30 18:00:00","gmt_time_end":"2015-04-30 20:00:00","gmt_time_end_last":"2015-04-30 20:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"221981","name":"Graduate Studies"}],"categories":[],"keywords":[{"id":"1366","name":"defense"},{"id":"1808","name":"graduate students"},{"id":"913","name":"PhD"},{"id":"5171","name":"PTFE"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1788","name":"Other\/Miscellaneous"}],"invited_audience":[{"id":"78771","name":"Public"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}}}