Techniques of Sample Preparation and Conditioning

Temperature, cca Cooling rate, C/min Sample thidcness. X-ray crystallinity 

2% nitrobenzene soln quenched with alcohcrf Flocculent powder 0.15 

In another study 102) it was demonstrated that under specific conditions single polymer crystals exhibiting equilibrium melting behavior may be grown from the melt. Previously it was believed that single crystals can only be obtained by means of solution crystallization techniques. 

In the discussion following a brief account will be given on techniques of rapid quenching and annealing of polymers. 

Another apparatus in which heat transfer is achieved by conduction to a solid substrate and one particularly appealing to polymo- studies is the piston and anvil quenching device. The design, shown in Fig. 12 and based on the principle of an accelerating substrate a inst a fixed globule was first conc v by Pietrokowsky (103). 

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