Monomer units, in polymers

For step-change polymerization at steady-state in a CSTR represented by the kinetics model in Section 7.3.2, derive equations giving the weight fraction of r-mer, wr, on a monomer-free basis, as a function of r, the number of monomer units in polymer Pr at the reactor outlet. This is a measure of the distribution of polymers in the product leaving the reactor. 

Problem 8.5 Consider the flow tube for rapid polymerization reactions shown schematically in Fig. 8.1. Let V be the volume of the tube (distance between the mixing jets) and V be the volume of the total liquid flowing through in time t. Denoting the total concentration (constant) of polymer chain ends by Eq. (8.29) and the concentration of monomer units in polymer by [Mjp derive an expression for monomer conversion as a function of t. 

Polymers can be considered on a range of size scales, from that of the molecules to that of the final products (Fig. 2.1). This chapter considers the molecular level the regularity of the arrangement of monomer units in polymer chains, the characterisation of that arrangement, and the effects on the polymer crystallinity. 

Fig. 2-10 Variation in the relative degree of crosslinking with percentage conversion during the emulsion polymerization of styrene/butadiene 25 75 in a batch system at 30 C. (average number of cross-links per monomer unit in polymer)...

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