KOSEN 한인과학기술자네트워크

>안녕하십니까? > >저는 PVA 중합에 대해 연구하고 있습니다. > >용액중합을 하고 있는 해외 다른 회사나 중합에 대한 전반적인 > >정보(Braching, tacticity, 중합조건, 분자량 조절, chain transfer > >agent)가 있으시면 알려주세요... > >부탁드리겠습니다. > >특히 일본업체(Kuraray)등에 관한 정보가 있으시면 더욱 고맙고요. > > --------------------------------------------------------------- Characterization and physical properties of low molecular weight poly(vinyl acetate) and poly(vinyl alcohol) Sato, Toshiaki (Kuraray Co, Ltd) Okaya, Takuji Source: Polymer Journal v 24 n 9 1992 p 849-856 0032-3896 Abstract: Low molecular weight poly(vinyl acetate) (PVAc) and poly(vinyl alcohol) (PVA) having a 2-hydroxyethylthio group at one end were synthesized using 2-mercaptoethanol as a chain transfer agent. The dependence of physical properties of PVAc and PVA on the degree of polymerization was investigated. It became clear that vapor pressure osmometry was useful as well as 1H NMR analysis to determine the number average degree of polymerization of the low molecular weight PVAc and PVA. The glass transition temperature of the PVAc decreased below 150 as the number average degree of polymerization (P over-bar n), and the melting temperature and degree of crystallinity of the PVA had no or little change above around 100 of P over-bar n, but changed below 100, especially at less than 50. The effect of chemical structure of the end groups on the swelling was also studied. 1. Control of nematic liquid crystal alignment using stripped film method Kawata, Yasushi; Mori, Yasushi Author Affiliation: Toshiba Corp Source: Japanese Journal of Applied Physics, Part 2: Letters v 36 n 12B Dec 15 1997 JJAP p L1695-L1698 0021-4922 In English 2. Surface properties of films containing poly(vinyl alcohol) having an n-alkylthio group at one end Sato, Toshiaki; Tsugaru, Toshinori; Yamauchi, Junnosuke; Okaya, Takuji Author Affiliation: Kuraray Co Ltd Source: Polymer v 34 n 12 Jun 1993 Publ by Butterworth-Heinemann Ltd p 2659-2664 0032-3861 In English 3. Study on physical properties of poly (vinyl acetate) emulsion films obtained in batchwise and in semicontinuous systems Okaya, Takuji; Tanaka, Taku; Yuki, Ken Author Affiliation: Kuraray Co., Ltd Source: Journal of Applied Polymer Science v 50 n 5 Nov 5 1993 p 745-751 0021-8995 In English 4. Effect of modification of poly(vinyl alcohol) on ability of protective colloid in emulsion polymerization Yuki, Ken; Sato, Toshiaki; Okaya, Takuji Author Affiliation: Kuraray Co, Ltd Source: Kobunshi Ronbunshu/Japanese Journal of Polymer Science and Technology v 53 n 11 Nov 1996 Society of Polymer Science, Jpn p 761-763 0386-2186 In Japanese 5. Role of polyvinyl alcohol in emulsion polymerization Yuki, Ken; Sato, Toshiaki; Maruyama, Hitoshi; Junnosuke, Yamauchi; Okaya, Takuji Author Affiliation: Kuraray Co. Ltd Source: Polymer International v 30 n 4 1993 p 513-517 0959-8103 In English 6. Specific interaction of starch and polyvinyl alcohols having long alkyl groups Okaya, Takuji; Kohno, Hiroji; Terada, Kazutoshi; Sato, Toshiaki; Maruyama, Hitoshi; Yamauchi, Junnosuke Author Affiliation: Kuraray Co, Ltd Source: Journal of Applied Polymer Science v 45 n 7 Jul 5 1992 p 1127-1134 0021-8995 In English 7. Physical and surface properties of aqueous solutions of polyvinyl alcohols having an n-alkylthio end group Sato, Toshiaki; Okaya, Takuji Author Affiliation: Kuraray Co Ltd Source: Journal of Applied Polymer Science v 46 n 4 Oct 5 1992 p 641-647 0021-8995 In English 8. Characterization and physical properties of low molecular weight poly(vinyl acetate) and poly(vinyl alcohol) Sato, Toshiaki; Okaya, Takuji Author Affiliation: Kuraray Co, Ltd Source: Polymer Journal v 24 n 9 1992 p 849-856 0032-3896 In English 9. Effects of hydrophile-lypophile balance of emulsifier on electrooptical properties and morphology of poly(vinylalcohol)/liquid crystal composite Ono, Hiroshi; Kawatsuki, Nobuhiro Author Affiliation: Kuraray Co Source: Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes & Review Papers 34 12A Dec 1995 JJAP p 6473-6477 In English 10. Gel spinning of syndiotacticity-rich poly(vinyl alcohol) from hydrochloric acid solution Okazaki, Masaki; Miyasaka, Yoshinobu; Matsuzawa, Shyuji Author Affiliation: Kuraray Co, Ltd Source: Kobunshi Ronbunshu/Japanese Journal of Polymer Science and Technology 52 11 1995 Society of Polymer Science, Jpn p 710-717 0386-2186 In Japanese 11. Development of poly(vinyl alcohol) hydrogel for waste water cleaning. II. Treatment of N,N-dimethylformamide in waste water with poly(vinyl alcohol) gel with immobilized microorganisms Okazaki, Masaki; Hamada, Tosihiro; Fujii, Hiroaki; Kusudo, Osamu; Mizobe, Akio; Matsuzawa, Shuji Author Affiliation: Kuraray Co, Ltd Source: Journal of Applied Polymer Science 58 12 Dec 19 1995 John Wiley & Sons Inc p 2243-2249 0021-8995 In English 12. Development of poly(vinyl alcohol) hydrogel for waste water cleaning. I. Study of poly(vinyl alcohol) gel as a carrier for immobilizing microorganisms Okazaki, Masaki; Hamada, Tosihiro; Fujii, Hiroaki; Mizobe, Akio; Matsuzawa, Shuji Author Affiliation: Kuraray Co, Ltd Source: Journal of Applied Polymer Science 58 12 Dec 19 1995 John Wiley & Sons Inc p 2235-2241 0021-8995 In English 13. Study on application of block copolymers composed of poly(vinyl alcohol) and polyacrylamide to paper sizing Okaya, Takuji; Sato, Toshiaki; Ono, Isao; Maruyama, Hitoshi; Terada, Kazutoshi Author Affiliation: Kuraray Co, Ltd Source: Journal of Applied Polymer Science 57 13 Sep 26 1995 John Wiley & Sons Inc p 1645-1651 0021-8995 In English 14. Effects of saponification rate on electrooptical properties and morphology of poly(vinyl alcohol)/liquid crystal composite films Ono, Hiroshi; Kawatsuki, Nobuhiro Author Affiliation: Kuraray Co Ltd Source: Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes & Review Papers 34 3 Mar 1995 JJAP p 1601-1605 In English 15. Application of poly(vinyl alcohol) with an alkyl end group containing anionic groups to coal-water slurry as a dispersant Yamauchi, Junnosuke; Terada, Kazutoshi; Sato, Toshiaki; Okaya, Takuji Author Affiliation: Kuraray Co, Ltd Source: Journal of Applied Polymer Science 55 11 Mar 14 1995 John Wiley & Sons Inc p 1553-1561 0021-8995 In English 16. New fabrication method for poly(vinyl alcohol)/liquid crystal composite films with controlled droplet size Ono, Hiroshi; Kawatsuki, Nobuhiro Author Affiliation: Kuraray Co, Ltd Source: Japanese Journal of Applied Physics, Part 2: Letters 34 1A Jan 1 1995 JJAP p L54-L56 0021-4922 In English 17. Effects of anchoring strength in poly(vinyl alcohol)/liquid crystal composite films with interface layers Ono, Hiroshi; Kawatsuki, Nobuhiro Author Affiliation: Kuraray Co, Ltd Source: Japanese Journal of Applied Physics, Part 2: Letters 33 12A Dec 1 1994 JJAP p 6637-6641 0021-4922 In English 18. Poly(vinyl alcohol)/liquid crystal composite films with low driving voltage Ono, Hiroshi; Kawatsuki, Nobuhiro Author Affiliation: Kuraray Co, Ltd Source: Japanese Journal of Applied Physics, Part 2: Letters 33 12B Dec 15 1994 JJAP p L1178-L1781 0021-4922 In English 19. Electrooptical properties of poly(vinyl alcohol)/liquid crystal composite films with added photocured polymers Ono, Hiroshi; Kawatsuki, Nobuhiro Author Affiliation: Kuraray Co, Ltd Source: Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes & Review Papers 33 11 Nov 1994 JJAP p 6268-6272 0021-4922 In English 20. Light scattering studies on poly(vinyl alcohol)/liquid crystal composites with controlled morphology Ono, H.; Kawatsuki, N. Author Affiliation: Kuraray Co, Ltd Source: Journal of Materials Science Letters 15 4 Feb 15 1996 Chapman & Hall Ltd p 292-294 0261-8028 In English