- Spherulites
If we take the radiation-growing axialites at high temperatures as the dominant
lamellae, and the empty spacing is filled with the subsidiary lamellae grown at low
temperatures, we can obtain the sphere-like crystals with dense filling, often called
thetype-I spherulites. Besides this kind of spherulites obtained by sequential
formation of dominant and subsidiary lamellae during cooling, there exists another
Fig. 10.16 Surface
morphology of a lamellar
single crystal of 512-mers
grown from semi-dilute
solutions in the dynamic
Monte Carlo simulations. The
view angle favors the
exposure of the preferred
orientations of fold ends in
each sectors separated by the
black thick lines (Hu et al.
2003b)
Fig. 10.17 Illustration of lamellar stacking structure (fromlefttorightare axialites, type-I
spherulites and type-II spherulites)
Fig. 10.15 Surface
morphology of paraffin wax
that was sprayed on the
polyethylene single crystal
grown in thin films
(Wittmann and Lotz 1985 ).
The epitaxial grown paraffin
wax with favorite orientations
clearly shows different fold-
end sectors (Permission
granted by Wiley)
10.3 Crystalline Structures of Polymers 205