Molecular Weight of Repeating Link

For polyarylates number the molecular weights of repeating link mO were calculated and the values D,. were estimated according to the Eq. (4). It turns out, that for all polyarylates with metha-substituted residues of dicaibon acid in the main chain the good linear dependence (D growth at mO increasing) is observed and the reasons of defleetion from it polyarylates Ph-2 and Ph-7 (para-connections) were considered above. The values p were calculated for two conventional polyarylates with mO = 300 and 600, which turn out to be equal to 0.071 and 0.020, respectively. Thus, twice rise of mO results to p reduction approximately in 3.5 times [123], 

The adduced in work [127] dependences of conversion degree Q and reduced viscosity q for polyarylate Ph-2 on relation CATA/PP have extreme character with maximum at equimolar relation CATA/PP =1 1 and two-fold concentration increase of any from reagents results to Q reduction approximately in 1.5 times 

The determined according to the Eq. (4) value for polyaiy late Ph-2 is equal 

From the Eqs. (26) and (78) the values q, (in relative units), corresponding simultaneously to the experimental dependences of Q and MM on (CATA)/(PP). Thus estimated values q are adduced in Fig. 37, from which it follows, that they reache minimum at reagents equimolar relation. 

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FIGURE 101 The dependence of macromolecular coil fractal dimensionon molecular weight of repeated link for PS-C solutions in tetrahydrofnran (1) and chloroform (2). 

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