Polyarylates description

Hence, the stated above results demonstrated the possibility of quantitative description of solvent nature on polyarylate Ph-2 formation process by low-temperature polycondensation. The proposed within the frameworks of modem... 

Accounting for said above appreeiation the authors [113] demonstrated principal possibility and expediency of the considered physical principles application for nonequihbiimn polycondensation description on the simplest example of polyarylate Ph-2 synthesis in solution. The macromolecular coil fractal dimension D j. value was determined according to the Eq. (4) and spectral dimension d — according to the Eq. (39). The estimations have shown, that D =1.55 and d =1.0, from which it follows, that in the considered conditions Ph-2 is a typical linear polymer [72]. 

The authors [87-89] used for DMDAACh MWD curves theoretical description and determination of the factors influencing their shape, the model [48], successfully applied above for the similar curves description in case of polyarylates, obtained by different poly condensation modes (see section 1.2). As it has been noted above, since in the Eq. (64) of Chapter 1 the value X does not influence on the distribution P CN), then the indicated relationship assmnes three main parameters, influencing on the distribntion P CN) a , b and o. Each from the indicated parameters expresses the certain feature of polymerization process. So, the exponent a is defined as a matter of fact by macromolecnlar coil stmcture, that follows directly from the Eq. (63) of Chapter 1. The valne b characterizes a type and intensity of destraction processes. The parameter is defined by the stochastic contribntion in polymerization process and the dependence of on c, can be as-... 

As it has been shown above (see the Eqs. (15.7) and (15.15)), the nanocluster relative fraction increasing results to polymers elasticity modulus enhancement similarly to nanofiller contents enhancement in artificial nanocomposites. Therefore, the necessity of quantitative description and subsequent comparison of reinforcement degree for the two indicated above nanocomposites classes appears. The authors of Ref. [58, 59] fulfilled the comparative analysis of reinforcement degree by nanoclusters and by layered silicate (organoclay) for polyarylate and nanocomposite epoxy poly-mer/Na" —montmorillonite [60], accordingly. 

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