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Novel Rare Earth Catalysts for the Living Polymerization and Block Copolymerization of ε-Caprolactone

✍ Scribed by Shen, Youqing; Shen, Zhiquan; Zhang, Yifeng; Yao, Kemin


Book ID
111965813
Publisher
American Chemical Society
Year
1996
Tongue
English
Weight
326 KB
Volume
29
Category
Article
ISSN
0024-9297

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📜 SIMILAR VOLUMES


Random copolymerization of ϵ-caprolacton
✍ Youqing Shen; Zhiquan Shen; Yifeng Zhang; Qiaohong Huang; Lianfang Shen; Hanzhen 📂 Article 📅 1997 🏛 John Wiley and Sons 🌐 English ⚖ 247 KB 👁 2 views

Random copolymerization of trimethylene carbonate (TMC) with e-caprolactone (CL) catalyzed by rare earth chloride-epoxide or rare earth isopropoxide has been investigated for the first time. It was found that in the presence of epoxide, rare earth chlorides have high activities for the copolymerizat

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The polymerization of caprolactone ( 1-CL) was initiated by yttrium triisopropoxide {Y(OP i r ) 3 }, bimetallic isopropoxide of yttrium and aluminum {Y[Al(OP i s ) 4 ] 3 }, yttrium and tin(II) {Y[Sn(OP i r ) 3 ] 3 }, and tin(II) and yttrium {Sn[Y(OP i r ) 4 ] 2 }, respectively. The polymerization wa