Growth of Single Crystals Length, Width, and Periodicity

2 Growth of Single Crystals Length, Width, and Periodicity 

Lauritzen and Hoffman (34). However, the slope departs from the linear growth, suggesting that the secondary crystallization must have taken place with continued elapsed time. Shallower quenches reveal a similar trend however, the timescale covered here is too short to substantiate any claim. As expected, the growth rate in the b-cLxis direction is faster than that in the a-axis direction. 

Another intriguing observation is that there is a movement of single crystals grown at a temperature slightly below the melting temperature of sPP (125°C) as 

A natural question is why the lamellar single crystal has to deform in a periodic manner. A possible account is due to the induced mechanical field during isothermal crystallization. This periodicity is consistent over the entire crystal and seems to be sensitive to crystallization temperature. The effect of supercooling on the periodicity of undulations obtained in 1 and 2 wt% sPP blend compositions is 

3 Phase Field Modeling for a Single-Component System Sectorization and Ripple Formation in sPP 

---