A 13C NMR Study of New Metallocene Polyolefin Vistamaxx Elastomer

Abstract

Abstract:

The composition and structure of three new polyolefin specialty elastomers, which were propylene-ethylene copolymers, were studied by ¹³C NMR. It was found that propylene and ethylene underwent atactic polymerization in the elastomers and the weight percentage of ethylene monomer was lower than 20 wt%. The monomer and sequence distributions and methylene number average sequence length were quantitatively determined. The observed triad distribution agreed with the results predicted with Bernoullian statistical model. The average chain segment length and distribution were calculated according to Bernoullian statistical model and copolymer compositions.

Key words: ¹³C NMR, monomer and sequence distribution, methylene number average sequence length, Bernoullian statistical model, weight distribution function, Vistamaxx specialty elastomer

CLC Number:

O482.53

ZHAO Hui-Peng. A ¹³C NMR Study of New Metallocene Polyolefin Vistamaxx Elastomer[J]. Chinese Journal of Magnetic Resonance, 2010, 27(2): 194-205.

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A ¹³C NMR Study of New Metallocene Polyolefin Vistamaxx Elastomer

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