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 steps of order formation during the polypropylene cooling from superheated to supercooled melt were determined by wideangle X-ray scattering. The symmetrical Gaussian halo at the temperatures higher than 280°C is the manifestation of intermolecular short-range order. Below 280°C the additional halo corresponding to the intramolecular short-range order connected with the helix fragments formation appeared. In the supercooled melt just before the beginning of the crystal formation process the diffractogram profile was similar to that of the paracrystalline form consisting of the long distance one-dimensional order domains. The existence of this metastable form with mesomorphous structure was confirmed by NMR and IR data.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00401713
