Unusual rheological behaviors of linear PE and PE/kaolin composite
Wu, QY; Wang, X; Gao, WP; Hu, YL; Qi, ZN
AbstractThe unusual flow behaviors of linear PE melts are caused by high molecular weight, tight entanglements of molecular chains, and strong adsorption of the melt at the capillary wall. Especially, the extreme change of interface adsorption is followed by an unusual flow, and at the molecular level, the dynamic variety of entanglement and disentanglement between the adsorption chain near the wall and the nonadsorption chain is the cause of the extrusion pressure vibration. Ultrahigh molecular weight polyethylene (UHMWPE)/kaolin composites prepared by polymerization filling could be smoothly extruded through the capillary. Also, with increase of the kaolin content, the apparent viscosity of the composite decreased and the processability was improved. Under slip boundary conditions, the real shear rate and shear stress of the melt near the capillary wall were reduced. The viscosity descent (desorption) and the deformation energy decrease of the melt near the wall were the important preconditions to gain a steady flow in a second glossy zone. (C) 2001 John Wiley & Sons, Inc.
KeywordLinear Pe Kaolin Composite Polymerization Filling Unusual Rheological Behavior
Indexed BySCI
WOS IDWOS:000167862400005
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Cited Times:16[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorWu, QY
Affiliation1.Qingdao Inst Chem Technol, Qingdao 266042, Peoples R China
2.Chinese Acad Sci, Inst Chem, State Key Lab Engn Plast, Beijing 100080, Peoples R China
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GB/T 7714
Wu, QY,Wang, X,Gao, WP,et al. Unusual rheological behaviors of linear PE and PE/kaolin composite[J]. JOURNAL OF APPLIED POLYMER SCIENCE,2001,80(12):2154-2161.
APA Wu, QY,Wang, X,Gao, WP,Hu, YL,&Qi, ZN.(2001).Unusual rheological behaviors of linear PE and PE/kaolin composite.JOURNAL OF APPLIED POLYMER SCIENCE,80(12),2154-2161.
MLA Wu, QY,et al."Unusual rheological behaviors of linear PE and PE/kaolin composite".JOURNAL OF APPLIED POLYMER SCIENCE 80.12(2001):2154-2161.
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