Cationic ring-opening polymerization of ϵ-thionocaprolactone: Selective formation of polythioester
✍ Scribed by Fumio Sanda; Duangjai Jirakanjana; Masakatsu Hitomi; Takeshi Endo
- Publisher
- John Wiley and Sons
- Year
- 2000
- Tongue
- English
- Weight
- 143 KB
- Volume
- 38
- Category
- Article
- ISSN
- 0887-624X
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Polymerization of 1-caprolactone had been investigated with cyclopentadienyl sodium as an initiator. The effects of reaction time, temperature, and concentration of the initiator on the yield and molecular weight of the polymer were discussed. It was shown that the high molecular weight of poly(1-ca
Polytetrahydrofuran monomethacrylate (MA-PTHF) macromonomer was prepared by cationic ring-opening polymerization(CROP) of tetrahydrofuran (THF) using boron trifloride etherate (BF 3 ⅐ OEt 2 ) as initiator and epichlorohydrin (ECH) as promoter. Two kinds of transfer agents were used: methacrylic acid
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