Polymerization of N-phenylmaleimide with rare earth coordination catalysts
โ Scribed by Liming Jiang; Yifeng Zhang; Zhiquan Shen; Lianfang Shen; Hanzhen Yuan
- Publisher
- John Wiley and Sons
- Year
- 1996
- Tongue
- English
- Weight
- 216 KB
- Volume
- 17
- Category
- Article
- ISSN
- 1022-1336
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โฆ Synopsis
Abstract
A highly active rare earth coordination catalyst composed of neodymium acetylacetonate, dibutylmagnesium, and hexamethylphosphoramide (mole ratio 1:7:14) for the polymerization of Nโphenylmaleimide (NโPMI) was developed. The resulting poly(NโPMI) has high molecular weight (Mฬ~n~ = 9.0 ร 10^4^) and shows excellent thermal stability.
๐ SIMILAR VOLUMES
A novel rare earth coordination system composed of lanthanide tri-รuoroacetates (Ln \ Y, Yb, Nd, Tm, Ho, La, Pr) and tri-Ln(CF 3 COO) 3 isobutylaluminium Al(i-Bu) was used as catalyst for the polymerization of 3 e-caprolactone (CL), D,L-lactide (DLLA) and their copolymerization. The inรuence of temp
## Abstract Polymerization of __n__โoctylallene was successfully carried out using a conventional binary rare earth catalytic system composed of rare earth tris(2โethylhexylphosphonate) (Ln(P~204~)~3~) and triโisobutyl aluminum (Al(__i__โBu)~3~) for the first time. The effects of catalyst, solvent,
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