Aggregation Structure of Chains in Lamella

The systematic behavior of infrared spectra observed for DHDPE/LLDPE(2) blend samples can be interpreted reasonably as follows. Using the simply coupled 

H-H sequences are given by 1 — X and X, respectively. Then the averaged size (N) of the D(H)pD clusters is calculated as 

In a similar way, we can predict the fraction of singlet H band component for the sequence of DHD. In Equation 5.2,/(p = 1) is the probability of getting a single band and/(p 1) is the probability of getting doublet bands. Therefore, the singlet 

From all these data analyses, we can definitely say that the D and H chain stems are distributed statistically randomly in the crystalline lamellae of the D/H cocrystallized blend. This conclusion is quite important in relation with the chain-folding problem, a controversial research theme that had been discussed for a long time (30). The random distribution of the D and H chain stems naturally supports the idea that the D and H chains reenter randomly into and out of the crystalline lamellae as shown in Fig. 5.7. The regular adjacent reentry model is impossible to apply at all as for as the melt-crystallized sample is concerned. 

In order to investigate the cocrystallization and phase segregation behaviors of the above-mentioned PE blend samples, we performed the experiments for both the isothermal and nonisothermal crystallizations. In the nonisothermal crystallization, the temperature is changed gradually and the WAXD, SAXS, or infrared spectra are collected as a function of temperature. In the isothermal crystallization, the 

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