ISSN:
1436-2449
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Summary The long-time crystallization of a set of polyethylenes, that have a variety of different molecular structures, has been studied under storage conditions well removed from those where partial melting or relatively rapid crystallization takes place. For high molecular weight linear polyethylenes, branched polyethylenes and ethylene copolymers a density increase of about 5% is observed. However, analysis of the Raman internal modes indicates that the core crystallinity remains constant. It is found that the density change reflects an increase in the partially ordered interfacial region at the expense of the disordered liquid-like region.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00282856
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