Abstract
Poly(phenylene sulfide)-poly(ether sulfone) (PPS-PES) block copolymers were synthesized by polycondensation of chloro-terminated PPS oligomers and hydroxylic-terminated PES oligomers at atmospheric pressure. The structure and compositions of PPS-PES block copolymers were analyzed quantitatively by FTIR spectroscopy. It was found that the contents of PES in copolymers increase with the amount of PES in the added materials ; however, the quantities of PES contents in copolymers are lower than its quantities in the added materials. The solubility, crystallization behavior, and thermal properties of PPS-PES block copolymers were studied through a solubility test, X-ray diffraction, DSC, and TGA. It was primarily proved that the copolymers have better solubility, lower crystallinity, and higher glass transition (T g ) than those of PPS. The nonisothermal crystallization kinetics and thermal decomposition kinetics of block copolymers were also studied ; furthermore, the crystallization kinetic parameters and the activation energy of thermal decomposition were calculated.
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