In order to simplify the calculations, the following assumptions were made:
1. The addition of PC to the first isocyanate function of DI cannot change the reactivity of the residual isocyanate.
2. All polymer chains have the same diffusion ability no matter with them chain length
3. Degradation reactions occur at the same rate for all samples regardless of the nature and molecular weight of chains
4. The increase in temperature during mixing due to the shear viscose heat and the heat released from the chain extension reaction is ignored.
5. The isocyanate groups react only with the hydroxyl groups of PET.
6. The kinetic constant of the reactions lead to connecting the four chains together, is half of k1.
7. Until 3 min that PET granules become
1. The addition of PC to the first isocyanate function of DI cannot change the reactivity of the residual isocyanate.
2. All polymer chains have the same diffusion ability no matter with them chain length
3. Degradation reactions occur at the same rate for all samples regardless of the nature and molecular weight of chains
4. The increase in temperature during mixing due to the shear viscose heat and the heat released from the chain extension reaction is ignored.
5. The isocyanate groups react only with the hydroxyl groups of PET.
6. The kinetic constant of the reactions lead to connecting the four chains together, is half of k1.
7. Until 3 min that PET granules become