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Molecular aggregation of PEEK with PES blends and the block copolymers composed of PEEK and PES components

1989; Wiley; Volume: 173; Issue: 1 Linguagem: Inglês

10.1002/apmc.1989.051730113

1522-9505

Zhongwen Wu, Yubin Zheng, Hongmao Yan, Tomoki Nakamura, Takafumi Nozawa, Ryutoku Yosomiya,

Advanced Polymer Synthesis and Characterization

Abstract Polymer blends of PEEK with PES were prepared by the solution blending method. Copolymers composed of PEEK and PES components were synthesized from these oligomers. The formation conditions exerted an influence over the molecular aggregation and the crystallization behaviors of the blend films and block copolymers which were examined by X‐ray diffractometry and DSC analysis. As a result, phase‐separation in the blend films was found when the formation temperature was high. The blend films formed at 340°C, quenched and annealed at 180°C, exhibited the same crystallization behavior as those of PEEK. In the case of the blend films formed at 300°C, the annealing of the films at 250°C was required to crystallize the blend films. The T g of a copolymer with a PEEK component content of more than 50% tends to shift toward a higher temperature than the T g of PEEK itself, and the T m of the copolymer toward a lower temperature than that of PEEK ist.