Comparison Between SPS and IPS

The thermodynamic parameters determined from the spherulitic growth rate in Regime II are listed in Table 11.3 for SPS and IPS [3]. 

The Q value for SPS is about one-third as small as that derived for IPS. The work of chain folding is closely correlated with molecular structure, and 

TABLE 11.3 Thermodynamic Parameters Characterizing the Sphernlitic Growth for SPS and IPS 

Corradini, R, Danusso, F., Mantica, E., Mazzanti, G., MoraglLo, G. Crystalline high polymers of a-olefins. 7. Am. Chem. Soc., Tl, 1708-1710 (1955). 

Crystallization kinetics of high polymers-isotactic polystyrene. /. Polym. Set Part A, 3,433-437 (1965). 

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