Abstract
Three linear ppolyaryls, polyetheretherketone (PEEK) polyetherketone (PEK) and polyphenylenesulphide (PPS) have been examined regarding crystal morphologies as obtained from solutions and molecular orientation in melt grown spherulites, the latter involving also experiments on the carbon fibre containing polymer. In addition to the individual features observed in solution grown crystals agreeing with those being reported concurrently from elsewhere, the present coordinated results on three polymers underline the common crystallization behaviour and texture for this family of polymers. These common features comprise the existence of lamellae as symptomatic of chain folding, acicular shapes indicative of uniaxial growth (b being the growth direction in all three cases), and irregular crystal edges. The sheaf development of these crystals then leads readily to a postulated radiolb-axis orientation in spherulites, confirmed directly in melt crystallized samples possessing transcrystalline textures induced by nucleating carbon fibres. Observations on the effect of carbon fibres drew our attention to the combined influence of the crystal nucleating effect and separation distance of these fibres on the resulting crystal texture of the polymer matrix: varying the relative magnitude of the two effects, can even reverse the overall crystal orientation in the sample. Such considerations should be pertinent to crystal texture development in composites with crystaallizable thermoplastic matrices in general.
Article PDF
Similar content being viewed by others
Explore related subjects
Discover the latest articles, news and stories from top researchers in related subjects.Avoid common mistakes on your manuscript.
References
P. C. Dawson andD. J. Blundell,Polymer 21 (1980) 577.
B. J. Tabor, E. P. Magre andJ. Boon,European Polym. J. 7 (1971) 1127.
A. J. Lovinger andD. D. Davis,Polym. Commun. 26 (1985) 322.
D. J. Blundell, J. M. Chalmers, M. W. Mackenzie andW. F. Gaskin,SAMPE Quarterly 16 (1985) 22.
J. Boon andE. P. Magre,Die Makromolekulare Chemie 126 (1969) 130.
N. T. Wakelyn,Polym. Commun. 25 (1984) 306.
D. R. Rueda, F. Ania, A. Richardson, I. M. Ward andF. J. Balta Calleja,ibid. 24 (1983) 258.
J. N. Hay, D. J. Kemmish, J. I. Langford andA. I. M. Rae,ibid. 25 (1984) 175.
Idem, ibid. 26 (1985) 283.
A. J. Lovinger, D. D. Davis andF. J. Padden, Jr,Polymer 26 (1985) 1595.
A. Keller,J. Polym. Sci. 36 (1959) 361.
S. Kumar, D. P. Anderson andW. W. Adams,Polymer 27 (1986) 329.
A. J. Lovinger andD. D. Davis,J. Appl. Phys. 58 (1985) 2843.
D. J. Blundell andB. N. Osborn,Polymer 24 (1983) 953.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Waddon, A.J., Hill, M.J., Keller, A. et al. On the crystal texture of linear polyaryls (PEEK, PEK and PPS). J Mater Sci 22, 1773–1784 (1987). https://doi.org/10.1007/BF01132406
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF01132406