Poly single crystal fibre

Figure 1 (a) Photograph of polydiacetylene single crystal fibres on mm graph paper, (b) Lattice planes in poly DCHD, spacing 1.2 nm. 

Fig. 5.64 Dependence of fracture strength of poly diacetylene single-crystal fibres upon fibre diameter.

Figure 5 Typical stress/strain curve for a poly(diacetylene) single crystal fibre. The closed circles are for loading and the...

Figure 6 (a) Dependence of fracture stress Gf upon fibre diameter d for poly(diacetylene) single crystal fibres. (b) Variations of 1/Gf with for poly(diacetylene) single crystal fibres ... 

A possible crystal structure for poly(p-benzamide) which is in accord with the measured repeat distance is shown in Fig. 8. It has been estimated that about 36 repeat units would have to be involved in one chain fold in this polymer. No obvious spacing corresponding to chain folds was found by low single X-ray measurements on highly oriented poly(p-benzamide) fibre. However, a strong equatorial streak was obtained which is consistent either with a microfibrillar structure having axially oriented fibrils or with axially oriented voids or regions of low density. ... 

Davies RJ, Eichhom SJ, Riekel C et al (2004) Crystal lattice deformation in single poly (p-phenylene benzobisoxazole) fibres. Polymer 45 7693-7704... 

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