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Toughened Polypropylene with Balanced Rigidity V. Melt Rheological Properties
Wang, J.; Zhang, H.; Cao, S.; Liu, J.; Liu, S.
2001-12-13
Source PublicationPolym. Adv. Technol.
ISSN1042-7147
Pages734-739
AbstractIn continuation of our endeavor to develop and characterize the high performance polypropylene composites and their toughening master batches (TMBs), we report here the melt rheological properties of toughened polypropylene with balanced rigidity (TRPP). The relations of shear stress (τ), shear rate equation image, apparent viscosity (η a), temperature (T) and compositions of TRPPs were systematically investigated. Experimental data revealed that under ordinary shear flow conditions, the TRPP melts showed a pseudo‐plastic feature. Based on the complexity of the melt flow of the blended poly‐component/multiphase polymer system and together with our experimental and related literature results, the relationship between η a and T for blended polymer melts was recommended to be expressed by the equation: log η a = α0 + α1/T, where α1 was defined as the temperature coefficient of apparent viscosity. The relationship between τ and equation image can be expressed by the equation: equation image, and the exponent n is decreased as τ increasing. At a given τ or equation image, the η a of TRPPs decreased with ethylene‐propylene to styrene‐butadiene elastomer ratios from 20/80 to 100/0, increased with total elastomer content in TRPP and decreased with elastomer amount in TMB increasing. The manner of changes in η a with compositions were not affected by the τ or T.
Keywordtoughened polypropylene balancedrigidity melt rheological properties temperature coeficient apparent viscosity
URLView the original
Language英語English
The Source to ArticlePB_Publication
PUB ID53830
Fulltext Access
Document TypeJournal article
CollectionDEPARTMENT OF BIOMEDICAL SCIENCES
Corresponding AuthorZhang, H.
Recommended Citation
GB/T 7714
Wang, J.,Zhang, H.,Cao, S.,et al. Toughened Polypropylene with Balanced Rigidity V. Melt Rheological Properties[J]. Polym. Adv. Technol.,2001:734-739.
APA Wang, J.,Zhang, H.,Cao, S.,Liu, J.,&Liu, S..(2001).Toughened Polypropylene with Balanced Rigidity V. Melt Rheological Properties.Polym. Adv. Technol.,734-739.
MLA Wang, J.,et al."Toughened Polypropylene with Balanced Rigidity V. Melt Rheological Properties".Polym. Adv. Technol. (2001):734-739.
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