Crystallization PEEK Poly

Andrew, I. Lovinger, Davis, D. D. (1984). Single Crystals of Poly (ester-ester-ketone) (PEEK). Polym. Commun, 25(6), 322-324. 

A. J. Lovinger, and D. D. Davis. "Single crystals of poly (ether-ether-ketone) (PEEK)." Polymer Communications Guildford, pp. 322-324,1985. 

Vaughan AS, Sutton SJ (1995) On radiation effects in oriented PEEK. Polymer 36 1549-1554 Wang Z, Li Y, Yang J, Gou Q, Wu Y, Wu X, Liu P, Gu Q (2010) Twisting of lamellar crystals in poly(3-hydroxybutyrate-co-3-hydroxyvalerate) ring-banded spherulites. Macromolecules 43 4441-4444... 

Measurement and Calculation of Kinetic Parameters for the Crystallization of Poly(ether ether ketone) (PEEK), Perkin Elmer, Thermal Analysis Newsletter, www. thermal-instruments. com/Applications/petan066.pdf. 

Polyarylether Ketones. The aromatic polyether ketones are tme thermoplastics. Although several are commercially available, two resins in particular, poly ether ether ketone [31694-16-3] (PEEK) from ICI and poly ether ketone ketone (PEKK) from Du Pont, have received most of the attention. PEEK was first synthesized in 1981 (20) and has been well studied it is the subject of numerous papers because of its potential use in high performance aircraft. Tough, semicrystalline PEEK is prepared by the condensation of bis(4-fiuorophenyl) ketone with the potassium salt of bis(4-hydroxyphenyl) ketone in a diaryl sulfone solvent, such as diphenyl sulfone. The choice of solvent is critical other solvents, such as Hquid HE, promote the reaction but lead to premature low molecular-weight crystals, which do not exhibit sufficient toughness (21). 

Over the years polymers have been produced suitable for use at progressively higher temperatures. Where this is a requirement, it is usual first to decide whether a rubbery or a rigid material is required. If the former, this has been dealt with by the author elsewhere." If the latter, it is usually convenient to look in turn at polycarbonates, PPO-based materials, polyphenylene sulphides, polysul-phones, polyketones such as PEEK and PEK, polyamide-imides, poly-phthalamides, fluoropolymers, liquid crystal polymers and polyimides. 

PEEK is miscible with poly(ether imide) (PEI). PEI is less expensive than PEEK it is used as an amorphous thermoplastic. The kinetics of crystallization and other properties of such blends have been presented in the literature. 

For the gasket, instead of PP, poly(phenylene sulfide), poly(ethyl-ene terephthalate), poly(amide), liquid crystal polymer, tetrafluoroethyl-ene/perfluoroalkyl vinyl ether copolymer resin, PEEK, and poly(ether nitrile) have been found to be free of explosions and other drawbacks at the reflow temperature." ... 

In this section the broad spectrum of melting of one-component macromolecular systems is described by means of several specific polymers. The description starts with polyethylene, the most analyzed polymer. It continues with two sections that present several special effects seen in the thermal analysis of polymers including some examples of detailed analyses by TMDSC, documenting the locally reversible melting and crystallization equilibrium within a globally metastable structure. Then illustrations of poly(oxymethylene) and PEEK are given as typical common polymeric materials. This is followed in the last section with the discussion of special effects seen in drawn polymers, as are commonly found in fibers and films. 

C. Bas, P. Battesti, and N. D. Alberola. "Crystallization and melting behaviors of poly (aryletheretherketone) ( PEEK) on origin of double melting peaks." Journal of Applied Polymer Science, pp. 1745-1757,1994. 

Chen F, Shanks RA, Amarasinghe G (2004) Molecular distribution analysis of melt-crystallized ethylene copolymers. Polym Int 53(11) 1795-1805 Cheng SZD, Lotz B (2005) Enthalpic and entropic origins of nucleation barriers during polyuner crystallization the Hoffman-Lauritzen theory and beyond. Polymer 46(20) 8662-8681 Cheng SZD, Cao MY, Wunderlich B (1986) Glass transition and melting behavior of poly (oxy-l,4-phenyleneoxy-l,4-phenylenecarbonyl-l,4-phenylene) (PEEK). Macromolecules 19 (7) 1868-1876... 

There have been examples of other materials, such as thin glass-epoxy, that have not been widely used. To satisfy the new concept of HDI flexible circuits, innovative uses of raw materials such as polyethylene naphthalate (PEN) film, liquid crystal polymer (LCP) film, and poly ether ether ketone (PEEK) film have been introduced. Comparisons are shown in Table 61.7. 

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