{"id":{"repo_id":"gatech","oai_identifier":"oai:repository.gatech.edu:1853/28185"},"canonical_url":"https://search.dev.ndltd.org/etd/gatech/oai:repository.gatech.edu:1853/28185","repository":{"repo_id":"gatech","name":"Georgia Tech","base_url":"https://repository.gatech.edu/server/oai/request"},"display":{"title":"Analysis of structural development during superdrawing of poly(ethylene terephthalate) fibers","abstract":"A comprehensive experimental study was conducted to determine the limitations in processing conditions for superdrawing. Experimental studies were carried out by uniaxial drawing tests at temperatures from 90 to 120°C and at strain rates ranging from 0.008/s to 0.425/s. Crystallinity and orientation of the drawn samples were evaluated using differential scanning calorimetry and birefringence measurements. This study revealed that increasing temperature from 110°C to 120°C leads to more crystallization at low strain rates (0.001/s), and less crystallization at high strain rates (0.1/s). Furthermore, it was shown for the first time that the mechanism of crystallinity development in PET undergoes a transition at draw temperature of 113°C and strain rate of 0.17/s. A new one-dimensional constitutive model was developed to predict the stress-strain behavior of PET fibers as they are drawn to very large draw ratios (up to 10) over a wide range of temperature (90-120°C) and strain rate (0.008-0.425/s). The model was based on the rubber elasticity theory and non-linear viscoelasticity.","abstract_html":"A comprehensive experimental study was conducted to determine the limitations in processing conditions for superdrawing. Experimental studies were carried out by uniaxial drawing tests at temperatures from 90 to 120°C and at strain rates ranging from 0.008/s to 0.425/s. Crystallinity and orientation of the drawn samples were evaluated using differential scanning calorimetry and birefringence measurements. This study revealed that increasing temperature from 110°C to 120°C leads to more crystallization at low strain rates (0.001/s), and less crystallization at high strain rates (0.1/s). Furthermore, it was shown for the first time that the mechanism of crystallinity development in PET undergoes a transition at draw temperature of 113°C and strain rate of 0.17/s. A new one-dimensional constitutive model was developed to predict the stress-strain behavior of PET fibers as they are drawn to very large draw ratios (up to 10) over a wide range of temperature (90-120°C) and strain rate (0.008-0.425/s). The model was based on the rubber elasticity theory and non-linear viscoelasticity.","abstract_has_math":false,"creators":["Jain, Vibhor"],"institution":"Georgia Institute of Technology","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":"Polymer, Textile and Fiber Engineering","school":null,"contributors":[],"advisors":["Wang, Youjiang","Jacob, Karl I."],"committee_chairs":[],"committee_members":["Aneja, A.P.","Garmestani, Hamid","Thio, Yonathan S.","Yao, Donggang"],"year":2009,"date_issued":"2009-01-09","date_published":"2009-01-09","updated_at":"2026-07-27T19:50:58Z","subjects":["Superdrawing","Stress-strain modeling","Crystallization","Fiber drawing","PET"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/1853/28185","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Wang, Youjiang","Jacob, Karl I."]},{"key":"dc:contributor.committeemember","label":"Committee Member","values":["Aneja, A.P.","Garmestani, Hamid","Thio, Yonathan S.","Yao, Donggang"]},{"key":"dc:contributor.department","label":"Department","values":["Polymer, Textile and Fiber Engineering"]},{"key":"dc:creator","label":"Author","values":["Jain, Vibhor"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2009-06-08T19:18:55Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2009-06-08T19:18:55Z"]},{"key":"dc:date.issued","label":"Date","values":["2009-01-09"]},{"key":"dc:publisher","label":"Institution","values":["Georgia Institute of Technology"]},{"key":"dc:type","label":"Dc Type","values":["Text"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Superdrawing","Stress-strain modeling","Crystallization","Fiber drawing","PET"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/1853/28185"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["A comprehensive experimental study was conducted to determine the limitations in processing conditions for superdrawing. Experimental studies were carried out by uniaxial drawing tests at temperatures from 90 to 120°C and at strain rates ranging from 0.008/s to 0.425/s. Crystallinity and orientation of the drawn samples were evaluated using differential scanning calorimetry and birefringence measurements. This study revealed that increasing temperature from 110°C to 120°C leads to more crystallization at low strain rates (0.001/s), and less crystallization at high strain rates (0.1/s). Furthermore, it was shown for the first time that the mechanism of crystallinity development in PET undergoes a transition at draw temperature of 113°C and strain rate of 0.17/s. A new one-dimensional constitutive model was developed to predict the stress-strain behavior of PET fibers as they are drawn to very large draw ratios (up to 10) over a wide range of temperature (90-120°C) and strain rate (0.008-0.425/s). The model was based on the rubber elasticity theory and non-linear viscoelasticity."]},{"key":"dc:description.degree","label":"Dc Description Degree","values":["Ph.D."]},{"key":"dc:title","label":"Title","values":["Analysis of structural development during superdrawing of poly(ethylene terephthalate) fibers"]}]}],"canonical_facts":{"dc:contributor.advisor":["Wang, Youjiang","Jacob, Karl I."],"dc:contributor.committeemember":["Aneja, A.P.","Garmestani, Hamid","Thio, Yonathan S.","Yao, Donggang"],"dc:contributor.department":["Polymer, Textile and Fiber Engineering"],"dc:creator":["Jain, Vibhor"],"dc:date.accessioned":["2009-06-08T19:18:55Z"],"dc:date.available":["2009-06-08T19:18:55Z"],"dc:date.issued":["2009-01-09"],"dc:description.abstract":["A comprehensive experimental study was conducted to determine the limitations in processing conditions for superdrawing. Experimental studies were carried out by uniaxial drawing tests at temperatures from 90 to 120°C and at strain rates ranging from 0.008/s to 0.425/s. Crystallinity and orientation of the drawn samples were evaluated using differential scanning calorimetry and birefringence measurements. This study revealed that increasing temperature from 110°C to 120°C leads to more crystallization at low strain rates (0.001/s), and less crystallization at high strain rates (0.1/s). Furthermore, it was shown for the first time that the mechanism of crystallinity development in PET undergoes a transition at draw temperature of 113°C and strain rate of 0.17/s. A new one-dimensional constitutive model was developed to predict the stress-strain behavior of PET fibers as they are drawn to very large draw ratios (up to 10) over a wide range of temperature (90-120°C) and strain rate (0.008-0.425/s). The model was based on the rubber elasticity theory and non-linear viscoelasticity."],"dc:description.degree":["Ph.D."],"dc:identifier.uri":["http://hdl.handle.net/1853/28185"],"dc:publisher":["Georgia Institute of Technology"],"dc:subject":["Superdrawing","Stress-strain modeling","Crystallization","Fiber drawing","PET"],"dc:title":["Analysis of structural development during superdrawing of poly(ethylene terephthalate) fibers"],"dc:type":["Text"]},"updated_at":"2026-07-27T19:50:58Z"}