Rheological and morphological analysis of compatibilized polypropylene/polyamide blends
作者:
Y. Germain,
B. Ernst,
O. Genelot,
L. Dhamani,
期刊:
Journal of Rheology
(AIP Available online 1994)
卷期:
Volume 38,
issue 3
页码: 681-697
ISSN:0148-6055
年代: 1994
DOI:10.1122/1.550602
出版商: The Society of Rheology
关键词: POLYPROPYLENE;POLYAMIDES;VISCOELASTICITY;COPOLYMERS;MORPHOLOGY;VISCOSITY;SHEAR PROPERTIES;COMPATIBILITY;RELAXATION TIME;CAPILLARY FLOW;EMULSIONS
数据来源: AIP
摘要:
The influence of the compatibilizer, a block copolymer, on the rheological behavior of polypropylene/polyamide blends is discussed here. A dual‐flow behavior has been observed. At low shear rate, the blend viscosity is higher than the viscosity of the matrix, while at a high shear rate the contrary is observed. The morphology of the blends is different in the two domains, with a nodular morphology at low shear rate and a lamellar structure at high shear rate. The low shear rate behavior has been theoretically analyzed using a two‐phase Oldroyd model. The copolymer has been located at the interface and is supposed to dominate the nodular dispersed‐phase behavior. A good agreement has been found for the low‐concentration blend. A model of lamellar flow gives the right response for the high shear rate regime. The copolymer, acting as a lubricant, has an influence on the blend viscosity and the agreement with experimental data is discussed.
点击下载:
PDF
(980KB)
返 回