Polymer and Materials Science
Wiley InterScience Backfile Collection 1832-2000
Chemistry and Pharmacology
The epitaxial crystallization of trans-polyoctenylene (TOR) on isotactic polypropylene (iPP) in thin iPP/TOR films in the concentration range from neat iPP to a 50/50 wt.% blend has been investigated by X-ray analysis of annealed and unannealed samples. Due to the big differences of the melting temperatures of the two components, epitaxial growth of TOR lamellae on polypropylene can already be observed in unannealed samples. The TOR lamellae show rotational symmetry relative to the c-vector of the PP, and it can be shown that the (110)-TOR plane is the contact plane to the polypropylene crystals. The TOR lamellae make an angle of 40° with the PP lamellae. Tilt angles were determined both experimentally and theoretically. The calculated angles are Φ111PP = 49.3° and Φ010TOR = 43.1°.
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