Coarsening of High Impact Polypropylene

The coarsening of the EPR-rich phase in the hiPP is shown in scanning electron micrographs in Fig. 12.8. Coarsening was monitored for the molecular disper- 

The predictions of the coarsening theory that are embodied in Equation 12.3 are as follows. The temporal exponent for the rate of radial growth of the particle is 1/3. Therefore, the radius should vary with It is assumed that the total volume (Vxot) of the coarsening phase is invariant with time after the first-order transition (i.e., phase segregation). Therefore, the number of particles is proportional to According to Equation 12.3 then, the number of particles per unit volume, N, is proportional to 

The number of particles per unit area Aa (as observed in scanning electron photomicrographs) is related to the particles per unit volume N as follows  

The number of particles per unit volume A as a function of storage time in the melt for the ice water quenched (from data as in Fig. 12.8), as well as another set of more 

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