High-temperature crystallization and morphology of poly(aryl ether ether ketone)

Lovinger, Andrew J.; Hudson, Steven D.; Davis, Dena S.

doi:10.1021/ma00032a020

Cited by 94 publications

(55 citation statements)

References 12 publications

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“…Additionally, the sample also contains a twin-eye substructure, which has also been reported for some semicrystalline polymers. 17,18 On the other hand, Photo B displays a significantly different morphology from that in Photo A. Heating to 268°C on the 230°C crystallized sPS resulted in a totally different lamellar pattern (i.e., all lamellae were thickened and of an edge-on orientation).…”

Section: Resultsmentioning

confidence: 98%

Mechanisms of reorganization of lamellae in syndiotactic polystyrene

Sun

Woo

2000

J. Polym. Sci. B Polym. Phys.

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Section: Resultsmentioning

confidence: 98%

Mechanisms of reorganization of lamellae in syndiotactic polystyrene

Sun

Woo

2000

J. Polym. Sci. B Polym. Phys.

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“…[14,15] However, in nonisothermally crystallized films of the LC-PAEK/ PEEK blends with a higher content (>50%) of LC-PAEK, a ring-banded spherulite is formed, which has never been found in the two pure components. Especially in the 70:30 LC-PAEK/PEEK blend, well-developed spherulites with concentric extinction rings are observed under PLM ( Figure 1a).…”

Section: Resultsmentioning

confidence: 99%

Nature of the Ring‐Banded Spherulites in Blends of Aromatic Poly(ether ketone)s

Chen¹,

Yang²

2004

Macromol. Rapid Commun.

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Summary: The ring‐banded spherulites in liquid crystalline poly(aryl ether ketone) (LC‐PAEK) and poly(aryl ether ether ketone) (PEEK) blends with a higher content (>50%) of LC‐PAEK are investigated by polarizing light microscopy (PLM) and atomic force microscopy (AFM) techniques. The results indicate that the light core and rings of the ring‐banded spherulites under PLM are mainly composed of an LC‐PAEK phase, while the dark rings consist of coexisting phases of PEEK and a small amount of LC‐PAEK. The formation of the ring‐banded spherulites is attributable to structural discontinuity caused by a rhythmic radial growth.PLM image of ring‐banded spherulites in a 70:30 LC‐PAEK/PEEK blend caused by rhythmic growth.magnified imagePLM image of ring‐banded spherulites in a 70:30 LC‐PAEK/PEEK blend caused by rhythmic growth.

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“…It is related to film thickness, intermolecular interaction, molecule-substrate interaction, crystallization temperature, and so on. [24,25] The flaton oriented lamellae in the thin film have not been reported for P3AT up to now. Meille et al [16] demonstrated the coexistence of two crystalline phases of poly(3-decylthiophene) (P3DT) and found that the longer axis directions in the two forms are approximately orthogonal.…”

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confidence: 86%