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The dynamic rheological properties of four bimodal polyethylene samples with different molecular parameters were studied. The Cole-Cole plots, Han curves, Van Gurp’ plots, and master curves of elastic modulus, tan delta, and complex viscosity suggested that these four samples showed different micro-phase compatibility and the chain correlations affected strongly the chain dimensions of the polymer blends. A reduction of chain dimension would lead to a decrease of the possibility for a molecule in the melt to form a tie molecule and thus could affect the application performance of bimodal polyethylenes.
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Chen et al. (2012) studied this question.
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