ZHAO De-lu, FAN Qing-rong, QIAN Ren-yuan, Xiu Duan-fu. RELATIONSHIP BETWEEN THE ZERO SHEAR RATE VISCOSITIES OF PP MELT AND ITS VISCOSITY AVERAGE MOLECULAR WEIGHTS[J]. Acta Polymerica Sinica, 1981,(5):385-388.
ZHAO De-lu, FAN Qing-rong, QIAN Ren-yuan, Xiu Duan-fu. RELATIONSHIP BETWEEN THE ZERO SHEAR RATE VISCOSITIES OF PP MELT AND ITS VISCOSITY AVERAGE MOLECULAR WEIGHTS[J]. Acta Polymerica Sinica, 1981,(5):385-388.DOI:
The viscosity of PP melt in very low shear rate region was measured by the falling ball viscometer at 230℃. It is shown that the falling ball viscosity can be regarded as its zero shear rate viscosity. A relationship between the zero shear rate viscosities of PP melt and its viscosity average molecular weights was found aslog η0 = 3.72 log Mη