Preparation of Syndiotactic Poly(vinyl alcohol) Microfibrils with Radiopaque Inorganic Particles
- Preparation of Syndiotactic Poly(vinyl alcohol) Microfibrils with Radiopaque Inorganic Particles
- 오태환; 차진욱; 한성수; 이준석; 조혜원
- BULK-POLYMERIZATION; VINYL PIVALATE; SAPONIFICATION; FIBERS; POLYVINYL-ALCOHOL); EMBOLIZATION; ACETATE
- Issue Date
- POLYMER SOC KOREA
- POLYMER-KOREA, v.37, no.5, pp.563 - 570
- Poly(vinyl pivalate) (PVPi) was bulk polymerized to make poly(vinyl alcohol) (PVA) microfibrils to apply for polymeric embolization coils replacing metalic coils. Then, syndiotactic PVA (s-PVA) microfibrils having number-average degree of polymerization of 1100 and s-diad content of 60.4% were prepared via saponification of the PVPi with no separate spinning process. To make s-PVA microfibrils with radiopacity, zirconium dioxide (ZrO2) and barium sulfate (BaSO4) were added into s-PVA microfibrils during saponification. The computed tomography (CT) value indicating radiopacity reached up to over 1000 when the amount of ZrO2 and BaSO4 were 12 and 6 wt%, respectively.
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