ISSN:
0025-116X
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
It is shown that the molten state and the semi-crystalline state of polydisperse polyethylene are interrelated. Large polydisperse fractions obtained according to Pennings' fractionation method were studied by small angle X-ray scattering and differential thermal analysis; the long period, depending on the molecular weight distribution, is shown to be given by the weight average end-to-end distance of the coils; the long chains with molecular weights M 〉 105 behave as a series of “sub-chains” with molecular weight M* = 105 which crystallize independently. The same result is found for fractions with narrow molecular weight distribution and for mixtures of polyethylene fractions.
Additional Material:
5 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/macp.1983.021840122
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