Rheological Properties of Glass Fiber‐Reinforced Dough Molding Compounds

1976 ◽  
Vol 20 (4) ◽  
pp. 489-502 ◽  
Author(s):  
K. S. Gandhi ◽  
R. Burns
Keyword(s):  
Glass Fiber ◽  
Rheological Properties ◽  
Fiber Reinforced ◽  
Molding Compounds ◽  
Glass Fiber Reinforced

Rheological properties of grafted maleic anhydride based polypropylene composites filled with organoclay and glass fibers

e-Polymers ◽  
2007 ◽  
Vol 7 (1) ◽  
Author(s):  
Seung Hwan Lee ◽  
Jae Ryoun Youn
Keyword(s):  
Glass Fiber ◽  
Rheological Properties ◽  
Glass Fibers ◽  
Layered Silicate ◽  
Fiber Reinforced Composites ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
Silicate Nanocomposites ◽  
Glass Fiber Reinforced ◽  
Polypropylene Matrix

AbstractExfoliated polypropylene/layered silicate nanocomposites and chopped glass fiber reinforced composites were prepared by a melt compounding process using maleic anhydride modified polypropylene (PP-g-MAH). The effect of fillers on morphological and rheological properties in melt mixing of polypropylene matrix with compatibilizer was investigated and compared with various measurements. It was observed that polypropylene/layered silicate nanocomposites exhibited remarkable reinforcement compared with the conventional composites filled with glass fibers which were dispersed at micrometer scale. The nanocomposites had larger storage modulus at low frequency region and outstanding strain hardening behavior than those of pure polypropylene or glass fiber reinforced composites. It was shown that glass fiber reinforced composites had lower elastic properties and steady state elongational viscosities than pure polypropylene melt. Contrary to glass fiber reinforced composites, it was confirmed that 3-dimensional network structure due to strong intermolecular bonding between polypropylene matrix and layered silicates affected particular rheological properties of nanocomposites.

Shear flow rheological properties of vinylon- and glass-fiber reinforced polyethylene melts

1984 ◽  
Vol 23 (1) ◽  
pp. 20-30 ◽  
Author(s):  
T. Kitano ◽  
T. Kataoka ◽  
Y. Nagatsuka
Keyword(s):  
Shear Flow ◽  
Glass Fiber ◽  
Rheological Properties ◽  
Fiber Reinforced ◽  
Glass Fiber Reinforced ◽  
Polyethylene Melts

Glass-fiber-reinforced polypropylene/EPDM blend. I. Melt rheological properties

1991 ◽  
Vol 42 (9) ◽  
pp. 2595-2611 ◽  
Author(s):  
A. K. Gupta ◽  
P. Krishna Kumar ◽  
B. K. Ratnam
Keyword(s):  
Glass Fiber ◽  
Rheological Properties ◽  
Fiber Reinforced ◽  
Glass Fiber Reinforced

Compression Molding of Thermoset/Fiber Composites

2006 ◽  
Author(s):  
Chang Dae Han
Keyword(s):  
Composite Materials ◽  
Glass Fiber ◽  
Fiber Orientation ◽  
Unsaturated Polyester ◽  
Glass Fibers ◽  
Fiber Reinforced ◽  
Molding Compound ◽  
Molding Compounds ◽  
Glass Fiber Reinforced ◽  
End Use

Glass-fiber-reinforced thermoset composites have long been used by the plastics industry. Two primary reasons for using glass fibers as reinforcement of thermosets are: (1) to improve the mechanical/physical properties (e.g., tensile modulus, dimensional stability, fatigue endurance, deformation under load, hardness, or abrasion resistance) of the thermosets, and (2) to reduce the cost of production by replacing expensive resins with inexpensive glass fibers. In place of metals, the automotive industry uses glassfiber- reinforced unsaturated polyester composites. One reason for this substitution is that the weight per unit volume of composite materials is quite low compared with that of metals. This has allowed for considerable reductions in the fuel consumption of automobiles. Another reason is that composite materials are less expensive than metals. The unsaturated polyester premix molding compounds in commercial use are supplied as sheet molding compound (SMC), bulk molding compound (BMC), or thick molding compound (TMC) (Bruins 1976; Parkyn et al. 1967). These molding compounds can be molded in standard compression or transfer molds. The basic challenge in molding unsaturated polyester premix compounds is to get a uniform layer of glass reinforcement in place in the die cavity while the resin fills the cavity and reaches its gel stage during cure. Temperature, mold closing speed, pressure, and cure time are all functions of the design of the part being produced. The flow of the mixture through the gate(s) can result in variations in strength across the part due to fiber orientation during the flow. The precise end-use properties depend on the fiber orientation, fiber distribution, and fiber content in the premix compounds, which are greatly influenced by the processing conditions. Since the mechanical properties of the molded articles depend strongly upon the orientation of the glass fibers, it is important to understand how to control fiber orientation during molding. Unsaturated polyester accounts for the greater part of all thermosets used in glass-fiber-reinforced plastics. Glass-fiber-reinforced unsaturated polyesters offer the advantages of a balance of good mechanical, chemical, and electrical properties. Depending upon the application, a number of additives are employed to provide specific products or end-use properties.

scholarly journals Fabrication of Glass Fiber Reinforced Polypropylenes and their Physical Properties. 2. Influence of Surface Treatment on the Rheological Properties in Molten State.

Seikei-Kakou ◽  
1998 ◽  
Vol 10 (2) ◽  
pp. 139-148 ◽  
Author(s):  
Yosuke NISHITANI ◽  
Isamu SEKIGUCHI ◽  
Ken-ichi NAKAMURA ◽  
Yoshihiro NAGATSUKA ◽  
Takeshi KITANO
Keyword(s):  
Physical Properties ◽  
Surface Treatment ◽  
Glass Fiber ◽  
Rheological Properties ◽  
Molten State ◽  
Fiber Reinforced ◽  
Glass Fiber Reinforced

Short fiber reinforced thermoplastics. I. Rheological properties of glass fiber reinforced Noryl

1989 ◽  
Vol 10 (2) ◽  
pp. 78-83 ◽  
Author(s):  
A. Vaxman ◽  
M. Narkis ◽  
A. Siegmann ◽  
S. Kenig
Keyword(s):  
Glass Fiber ◽  
Rheological Properties ◽  
Short Fiber ◽  
Fiber Reinforced ◽  
Glass Fiber Reinforced ◽  
Reinforced Thermoplastics ◽  
Fiber Reinforced Thermoplastics
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