Abstract
The structure, morphology, and physical properties of syndiotatic poly(vinyl alcohol) (s-PVA) gel spun fibers were investigated to prepare polymeric embolization coils. S-PVA was prepared by saponification of the poly(vinyl acetate)/poly(vinyl pivalate)(PVAc/PVPi) copolymer. The viscosity of s-PVA solutions showed shear thinning behavior and the solution formed a homogeneous phase. Based on shear viscosity change with concentration, the optimum dope concentration was selected as 13 wt%, after which s-PVA fibers were spun and the solvent was removed. The fibers were then drawn with a maximum draw ratio of 15. A polymeric embolization coil was made of the s-PVA gel-spun fibers. The fibers were wound densely onto rigid rod and then annealed at different annealing temperatures. The polymeric embolization coil annealed at 200 °C was similar to metallic coils and its shape was maintained well after extension. Overall, gel-spun PVA fibers performed well for the preparation of primary and secondary coils to replace metallic coils.
| Original language | English |
|---|---|
| Pages (from-to) | 486-493 |
| Number of pages | 8 |
| Journal | Polymer (Korea) |
| Volume | 37 |
| Issue number | 4 |
| DOIs | |
| State | Published - 2013.07 |
Keywords
- Coil
- Draw ratio
- Embolization
- Gel spun fibers
- S-PVA
Quacquarelli Symonds(QS) Subject Topics
- Materials Science
- Engineering - Chemical
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