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Dynamic rheological behavior of reactively compatibilized polypropylene/polyamide 6 blending melts
Author(s) -
Liao Huayong,
Zheng Luyao,
Hu Yongbing,
Zha Xianjun,
Xu Xiang,
Wen Yanwei,
Tao Guoliang,
Liu Chunlin
Publication year - 2015
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.42091
Subject(s) - materials science , polypropylene , polyamide , composite material , dynamic modulus , dynamic mechanical analysis , rheology , scanning electron microscope , maleic anhydride , modulus , copolymer , polymer
The dynamic rheological behavior is measured by small amplitude oscillatory shear on rotational rheometer for polypropylene/polyamide 6 (PP/PA6) blends compatibilized by a polypropylene grafted maleic anhydride (PP ‐g‐ MAH). Scanning electron microscope (SEM) results show that the PP/PP ‐g‐ MAH/PA6 (=100/6/40wt) is sea‐island structure, the PP/PP ‐g‐ MAH/PA6 (=100/6/60wt) blend is semi‐cocontinuous. Coarse PA6 zones can be observed when the weight ratio is 100/6/80. At low frequency the complex viscosity, dynamic modulus of the PP/PP ‐g‐ MAH/PA6 (PP/PP ‐g‐ MAH = 100/6wt) blends first increase then drop with the increase of PA6 weight content in the range of 0–100, the maximum value arrives at the weight content of 60. The Cole–Cole plots as well as the weighted relaxation spectra of the blends have a main arc and a tail when the weight ratio of PP/PP ‐g‐ MAH/PA6 is in the range of 100/6/20–100/6/60, but have different shapes when the weight ratio increases to 100/6/80 and 100/6/100. The possible reason is the weight ratio of 100/6/80 and 100/6/100 is close to the phase inversion point. In fitting the storage modulus data at low frequency, Palierne's model with two parameters interfacial tension and interfacial shear modulus is better than Bousmina's model. Palierne's model with only one parameter of interfacial tension can not fit the data well. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42091.