Tetrachlorobisphenol‐A adipate polymers. III. Synthesis and crystalline properties of block copolymers of poly(tetrachlorobisphenol‐A adipate) and polystyrene

Block copolymers having poly(tetrachlorobisphenol-A adipate) (PTBA) and polystyrene (PS) sequences were synthesized were synthesized by photodegradation of an oxime-containing polyester in the presence of styrene. Crystallinity, melting behavior, and spherulitic growth rates were studied as a function of block compositions and molecular weights. A model was proposed based on a complete phase separation between the two components. The influence of the polymer composition on the spherulitic growth rate is described by introducing a supplementary pre-exponential factor into the equation for the growth rate. This parameter is a measure of the tortuosity of the actual path that has to be covered owing to the presence of the noncrystallizable blocks.