Application of melt flow index for rheological characterization of branched and linear polymers
Tóm tắt
A procedure for evaluating rheological characteristics, such as the master curves logη/η
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vs. log % MathType!MTEF!2!1!+-% feaafiart1ev1aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn% hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr% 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xd9Gqpe0x% c9q8qqaqFn0dXdir-xcvk9pIe9q8qqaq-xir-f0-yqaqVeLsFr0-vr% 0-vr0db8meaabaqaciGacaGaaeqabaWaaeaaeaaakeaaieGaceWFZo% Gbaiaaaaa!3B59!\[\dot \gamma \]η
0
and flow curves, using the melt flow index is described for branched and linear polymers. Experimental data on the melt flow index and branching degree are needed for this purpose, as well as some polymer constants, i.e. coefficients of theη
0
vs. MFI relation and coefficients of fluidity dependence on molecular characteristics. An example is given for bisphenol A polycarbonate.
Tài liệu tham khảo
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