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| Content Provider | Springer Nature Link |
|---|---|
| Author | Kim, Sung Joong Im, Seung Soon |
| Copyright Year | 2002 |
| Abstract | The structure development and dynamic properties of fibers produced by high-speed spinning of P(EN-ET) random copolymers were investigated. The as-spun fibers were found to remain amorphous up to the spinning speed of 1500 m/min, and subsequent increases in speed resulted in the crystalline domains containing primarilyα crystalline modification of PEN. Theβ modification was not found up to spinning speeds of 4500 m/min. On the other hand, annealing of constrained fibers spun at the 2100 m/min at 180, 200, and 240°C exhibitedβ-form crystalline structure, while the annealed fibers spun in 600–1500 m/min range exhibited dominantlyα-form. Howeverβ-form crystals disappeared above the spinning speed of 3000 m/min. With increasing spinning speeds from 600 to 4500 m/min, the storage modulus of as-spun fibers increased continuously and reached a value of about 10.4 Gpa at room temperature. The tanδ curves showed theα-relaxation peak at about 155–165°C, which is considered to correspond to the glass transition. Theα-relaxation peaks became smaller and broader, and shift to higher temperatures as the spinning speed increases, meaning that molecular mobility in the amorphous region is restricted by increased crystalline domain. |
| Starting Page | 18 |
| Ending Page | 23 |
| Page Count | 6 |
| File Format | |
| ISSN | 12299197 |
| Journal | Fibers and Polymers |
| Volume Number | 3 |
| Issue Number | 1 |
| e-ISSN | 18750052 |
| Language | English |
| Publisher | The Korean Fiber Society |
| Publisher Date | 2002-01-01 |
| Publisher Place | Seoul |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | PEN/PET copolymer High-speed spinning Annealing Crystal structure Dynamic property Polymer Sciences |
| Content Type | Text |
| Resource Type | Article |
| Subject | Chemistry Chemical Engineering Polymers and Plastics |
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