Application of FT rheology to industrial linear and branched polyethylene blends

作者：Vittorias Iakovos; Wilhelm Manfred^*

来源：Macromolecular Materials and Engineering, 2007, 292(8): 935-948.

DOI：10.1002/mame.200700120

Numerous analytical techniques are used to quantify branching topologies in polyethylene. one of these methods, FT rheology, studies the higher harmonic contributions of the stress response to large amplitude oscillatory shear deformation. The sensitivity of FT rheology in the presence of sparse long-chain branched chains blended with linear ones is addressed. FT rheology is sensitive even for small concentrations of a partly long-chain branched component blended with a linear melt (1.55 wt.-%). The non-linear parameters present a strong dependence on the fraction of long-chain branched species in a polydisperse melt, the miscibility of which is confirmed via rheological techniques.

• 出版日期2007-8-9