Yield stress molecular weight, relationship

Even at the approximate peak melting temperature of the linear samples, they all exhibit a small, but measurable, yield stress. At each temperature there is an approximate correlation between the values of yield stress for the linear samples and their degree of crystallinity this further correlates with their relative molecular weights. The relationship of elastic modulus to drawing temperature follows a pattern similar to that of the yield stress, with the notable exception that the moduli of branched samples are significantly greater than those of the linear materials at 100°C. 

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