ISSN:
0887-624X
Keywords:
Ziegler-Natta catalyst
;
coordination copolymerization
;
styrene-1-butene block copolymer
;
block copolymer
;
polymer fractionation
;
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The present investigation deals with sequential block copolymerization of styrene and 1-butene with a novel MgCl2-supported TiCl4 catalyst modified with a rare earth compound NdClx(OR)y (SN-1 catalyst), which was developed in our laboratory. The catalytic activities are 1300-2500 g/g·Ti·h. Analyses of copolymers with solvent extraction, 13C-NMR, WAXD, GPC, and DSC was performed. The results indicate that the SN-1 catalyst selectively gave crystalline diblock copolymers of isotactic polystyrene and isotactic poly(1-butene), with the styrene unit content of 30-60 mol %. © 1996 John Wiley & Sons, Inc.
Additional Material:
4 Ill.
Type of Medium:
Electronic Resource
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