Miscibility and crystallization behaviour of poly(ether ether ketone)/polyimide blends

• Published in: Polymer (Guilford) Vol. 37; no. 9; pp. 1751 - 1755
• Main Authors: Kong, Xiaohua, Teng, Fengen, Tang, Hao, Dong, Lisong, Feng, Zhiliu
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.04.1996; Elsevier
• Subjects: Applied sciences; charge transfer interaction; crystallization; Exact sciences and technology; miscibility; Organic polymers; Physicochemistry of polymers; poly(ether ether ketone); Properties and characterization; Thermal and thermodynamic properties; thermoplastic polyimide; poly(ether ether ketone); crystallization; miscibility; charge transfer interaction; thermoplastic polyimide; Supramolecular structure; Aromatic polymer; Polyetheretherketone; Miscibility; Crystallinity; Experimental study; Crystal morphology; Etherimide polymer; Mixture; Structure composition relationship
• ISSN: 0032-3861; 1873-2291
• DOI: 10.1016/0032-3861(96)83729-3

The miscibility and crystallization behaviour of the blends of poly(ether ether ketone) (PEEK) with two thermoplastic polyimides (PI), PEI-E and YS-30, prepared by solution blending were studied by the use of small-angle X-ray scattering (SAXS), differential scanning calorimetry (d.s.c.) and polarizing microscopy techniques. The results obtained show that PEEK/YS-30 is miscible, while PEEK/PEI-E is partially miscible only in the composition range with PEI-E content up to 20 wt%. The crystallization behaviour of PEEK in PEEK/PI blends depends on the crystallization condition of the blend sample as well as the chemical structure and the content of the PI added. Our SAXS results indicate that the segregation of PI molecular chains during crystallization of PEEK chains in the blends is interfibrillar for PEEK/PEI-E blends, but interlamellar for PEEK/YS-30 blends. The compatibility and the crystallization behaviour are discussed in terms of charge transfer interaction between PI and PI molecules and between PI and PEEK molecules.