Effects of nanoparticles on the density reduction and cell morphology of extruded metallocene polyethylene/wood fiber nanocomposites

2007 ◽  
Vol 104 (2) ◽  
pp. 1058-1063 ◽  
Author(s):  
G. Guo ◽  
K. H. Wang ◽  
C. B. Park ◽  
Y. S. Kim ◽  
G. Li
Keyword(s):  
Cell Morphology ◽  
Wood Fiber ◽  
Density Reduction ◽  
Metallocene Polyethylene

Processing and cell morphology relationships for microcellular foamed PVC/wood-fiber composites

1997 ◽  
Vol 37 (7) ◽  
pp. 1137-1147 ◽  
Author(s):  
Laurent M. Matuana ◽  
Chul B. Park ◽  
John J. Balatinecz
Keyword(s):  
Cell Morphology ◽  
Wood Fiber ◽  
Fiber Composites

Cell morphology and property relationships of microcellular foamed pvc/wood-fiber composites

1998 ◽  
Vol 38 (11) ◽  
pp. 1862-1872 ◽  
Author(s):  
Laurent M. Matuana ◽  
Chul B. Park ◽  
John J. Balatinecz
Keyword(s):  
Cell Morphology ◽  
Wood Fiber ◽  
Fiber Composites

A Novel Design for Producing Fine-Celled Foams of Plastic/Wood-Fiber Composites

2000 ◽  
Author(s):  
Ghaus M. Rizvi ◽  
Chul B. Park
Keyword(s):  
System Design ◽  
Cell Morphology ◽  
Fiber Composite ◽  
Wood Fiber ◽  
Fiber Composites ◽  
Wood Fibers ◽  
Blowing Agent ◽  
Composite Foams ◽  
Innovative System ◽  
Novel Design

Abstract This paper presents an innovative system design for production of plastic/wood-fiber composite foams based on a chemical blowing agent (CBA). Wood-fiber inherently contains moisture, which adversely affects the foam processing and the resultant cell morphology. To improve the cell morphology, the moisture content in the final foam should be minimized. A novel system design is presented for achieving this goal. Undried wood-fibers were processed together with HDPE, CBA and a coupling agent (CA) in a tandem extrusion system. At the interconnection of the two extruders, a vent was provided to purge the moisture into the atmosphere. HDPE/wood-fiber composite foams were produced on this system and on a single extruder without the vent, for comparison. The cellular morphology and volume expansion ratios of the foamed composites were characterized. The foams produced on the newly developed tandem system exhibited significantly improved cell morphology and surface quality.

SEM Study of Tension Wood Fiber Morphology and its Effect on Paper Properties

1977 ◽  
Vol 35 ◽  
pp. 308-309
Author(s):  
K. W. Robinson
Keyword(s):  
Tension Wood ◽  
Wood Fiber ◽  
Strength Properties ◽  
Fiber Morphology ◽  
Paper Properties ◽  
Pure Cellulose ◽  
Short Rotation ◽  
Hardwood Trees ◽  
Sem Study

Tension wood (TW) is an abnormal tissue of hardwood trees; although it has been isolated from most parts of the tree, it is frequently found on the upper side of branches and leaning stems. TW has been classically associated with geotropic alignment, but more recently it has been associated with fast growth. Paper made from TW is generally lower in strength properties. Consequently, the paper industries' growing dependence on fast growing, short- rotation trees will result in higher amounts of TW in the final product and a corresponding reduction in strength.Relatively few studies have dealt with the role of TW in the structure of paper. It was suggested that the lower strength properties of TW were due to a combination of factors, namely, its unique morphology, compression failures in the cell wall, and lower hemicellulose content. Central to the unique morphology of the TW fiber is the thick gelatinous layer (G-layer) composed almost entirely of pure cellulose.

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