Melting Point and Composition Distribution of Polyolefins by Fractionation
作者:
D.F. Slonaker,
R.L. Combs,
H.W. Coover,
期刊:
Journal of Macromolecular Science: Part A - Chemistry
(Taylor Available online 1967)
卷期:
Volume 1,
issue 3
页码: 539-557
ISSN:0022-233X
年代: 1967
DOI:10.1080/10601326708053988
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
The fractionation technique described in this paper was used to characterize the melting-point, monomer, and blocking distributions for polymers and copolymers. It is different from the molecular-weight fractionation technique in that the fractions are obtained by using a single solvent to extract the solid polymer below its melting point at stepwise-increasing temperatures. The reproducibility of this technique is excellent, and the technique is sufficient to distinguish pellet-to-pellet variation in a commercially available polypropylene. It was used to show the influence of preparation variables on the melting-point distributions of polyethylene and polypropylene and on the monomer and blocking distribution of copolymers, and to distinguish copolymers from blends.
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