Viscoelastic properties of short-fiber-reinforced rubber composites and the role of adhesion

1983 ◽  
Vol 28 (11) ◽  
pp. 3485-3495 ◽  
Author(s):  
V. M. Murty ◽  
S. K. De ◽  
S. S. Bhagawan ◽  
R. Sivaramakrishnan ◽  
S. K. Athithan
Keyword(s):  
Viscoelastic Properties ◽  
Short Fiber ◽  
Fiber Reinforced ◽  
Rubber Composites

Role of Adhesion in Viscoelastic Properties of Rubber-Tire Cord Composites

1981 ◽  
Vol 54 (1) ◽  
pp. 72-90 ◽  
Author(s):  
D. C. Prevorsek ◽  
R. K. Sharma
Keyword(s):  
High Frequency ◽  
Viscoelastic Properties ◽  
Optimum Level ◽  
Adhesion Test ◽  
Rubber Composites ◽  
Mechanical Measurements ◽  
Rubber Tire ◽  
Composite Properties

Abstract Dynamic mechanical measurements have been carried out on samples of rubber and PET cord-rubber composites, with and without adhesive, as a function of strain amplitude, temperature, pretension, angle of strain application and time of cycling. The results show that mechanical loss and dynamic modulus depend on these variables as well as the presence and type of adhesive at the cord-rubber interface. Based on these results, we conclude that adhesion plays a significant role in the viscoelastic properties of a composite and it is an important factor along with the properties of components in the analysis of tire performance in terms of composite properties. This study clearly shows that the maximum adhesion may not be the optimum adhesion in tire technology. The most relevant question, i.e., the determination of the optimum level of adhesion for a specific tire, however, remains unanswered. The viscoelastic properties of the composites decrease with time of cycling but the rate of decrease depends upon the level of adhesion in the starting material. This result could be important in the development of a more realistic dynamic adhesion test. Attempts to use the viscoelastic experiments with small amplitude, high frequency strain to determine the onset of fracture in the composite specimen appears to be promising. Work is in progress to determine the potential of this method in the analysis of adhesion.

scholarly journals Effect of Gear Pump Extrusion Processing on the Properties of Fiber Reinforced Rubber Composites

Polymers ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 985
Author(s):  
Xiaolong Tian ◽  
Lin Zhu ◽  
Kunling Li ◽  
Kongshuo Wang ◽  
Huiguang Bian ◽  
...  
Keyword(s):  
Short Fiber ◽  
Gear Pump ◽  
Fiber Reinforced ◽  
Rubber Composites ◽  
Molding Process ◽  
Extrusion Processing ◽  
Specific Direction ◽  
Efficiency Increase ◽  
Increasing Temperature

Short fiber reinforced rubber composites have been widely used in rubber products attributed to their excellent wear resistance. However, there are still some serious problems in the processing of short fiber reinforced rubber composites, such as Mooney viscosity increasing, temperature and extrusion pressure rising, and unstable extrusion quality. In particular, short fibers need to be extruded in a specific direction during the molding process, and the problems in this process are particularly prominent. In this manuscript, the influence of gear pump assisted extrusion on the properties of short fiber rubber composites is studied. The experimental results show that the application of a gear pump to assist extrusion could significantly increase the die pressure, reduce the extrusion temperature of the blend, and improve the extrusion efficiency and stability of the blend. Furthermore, it could improve the vulcanization efficiency, increase the tensile strength and tear strength of the compound, reduce wear, and guarantee the quality of extrusion products.

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