Factors affecting fibre strength

Reynolds, W.N. and Moreton, R. (1980) Some factors affecting the strengths of carbon fibres. Philos. Trans. R. Soc. A, 294 451-461. 

Johnson JW, Factors affecting the tensile strength of carbon-graphite fibres. Applied Polymer Symposia, No. 9, 229-243, 1969. 

Many factors affect the gel spinning process. The gel fibre can obtain the high strength and high modulus only by properly adjusting these factors. 

W. E Thomas, An investigation of the factors likely to affect the strength and properties of glass fibres, Phys. Chem. Glasses, 1 4,1960. 

The task of correlating fibre strength with its structure is extremely complex. In addition to the problem encountered in the analysis of the factors affecting the modulus, it is necessary to separate the effect of flaws from that of the structure itself. In addition, the molecular weight of the polymer is known to have a very significant influence on fibre strength. 

The most important filler parameter affecting modulus is its shape. Unfortunately, when the filler is non-spherical theories become much more complicated and the reader is advised to refer to Chow s review [61]. Shape factors can be incorporated in the models mentioned previously but are only useful when applied to very high aspect ratio materials, e.g., fibres. There is also an almost insurmountable problem with particulate fillers the difficulty and effort to measure aspect ratios of micrometre sized particles. Pukansky examined the effects of 11 different fillers in polypropylene [69] and concluded that Young s modulus is affected by the amount of bonded polymer, which is in turn related to surface area, and therefore to both particle size and shape. That observation helps to explain the strong effect that nano-fillers have on the modulus of a composite. Schreiber and Germain showed that modulus depends on the strength of interaction between the polymer and the filler surface [62]. 

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