[beta]-TCP
crystallizes in the rhombohedral space group R3c with unit cell parameters a = 10.439(1) [Angstrom], c = 37.375(6) [Angstrom], Z = 21 (hexagonal setting) (34).
If honey
crystallizes, make it liquid again by heating the jar (without the lid) in hot water or in a microwave oven at full power, checking at 20-second intervals.
If you want to achieve a final moisture level in the range of 50 ppm or lower and the benefits it provides, you must first
crystallize and then dry at the recommended temperatures.
In such a ease, the calcium carbonate
crystallizes in a ring shape.
The steps will be familiar to PET processors--blend virgin with regrind,
crystallize, dry, and then extrude sheet--but there are significant differences.
It must be noted that at crystallization temperatures of 180 and 200[degrees]C, which are above the melting temperature of PVDF ([T.sub.m], PVDF = 170[degrees]C), PET can
crystallize without any interference of PVDF crystallization.
The minerals and metals that had dissolved in the water
crystallize around the vent, forming a tall tube called a chimney.
The ability to
crystallize is yet another important feature for certain types of rubber.
The reduced mobility and the bulky nature of the ring also influence the ability of the polymer to
crystallize as it cools.
The polymers were dissolved completely at [T.sub.1], then cooled to [T.sub.2] to
crystallize isothermally for 24 h.
However, PHO does not exhibit spherulitic texture, so in order to determine crystallization rate all samples were melted, then allowed to
crystallize at different temperatures for 24 hours.
After pelletizing and drying, hot pellets are deposited onto a vibrating conveyor, where they
crystallize to the 40% level using residual heat from pelletizing.
