Cis-Polybutadiene-Natural Rubber Blends

1959 ◽  
Vol 32 (1) ◽  
pp. 308-320 ◽  
Author(s):  
H. E. Railsback ◽  
W. T. Cooper ◽  
N. A. Stumpe
Keyword(s):  
Natural Rubber ◽  
Shore Hardness ◽  
Rubber Blends ◽  
Heavy Duty Truck ◽  
Truck Tire ◽  
Truck Tires ◽  
Polybutadiene Rubber ◽  
Excellent Service ◽  
Road Testing ◽  
Better Than

Abstract The preparation of 1:1 cis-polybutadiene-natural rubber blends has been shown to be feasible on a laboratory scale. Blends of this type have displayed hysteresis properties equivalent to the natural rubber control and have exhibited satisfactory modulus, tensile and Shore hardness in the recipes developed. Tests on retread passenger tires have confirmed the excellent service performance indicated for blends of this type compared to natural rubber by giving outstanding abrasion resistance and better resistance to cracking. The compatibility and acceptable processing characteristics of cis-polybutadiene-natural rubber blends have been confirmed by factory mixing. Based on the results to date it appears that 1:1 blends of cis-polybutadiene and natural rubber should be significantly better than natural rubber alone for heavy duty truck tire treads. Road testing of 10:00 inch × 20 inch truck tires is now in progress. If the outstanding performace of the blends is confirmed, the utilization of cis-polybutadiene rubber in truck tires could materially lessen the dependence of the rubber industry on natural rubber.

Transient Properties of Truck Tires on Real Road Surfaces

1987 ◽  
Vol 15 (3) ◽  
pp. 188-197
Author(s):  
R. Weber ◽  
M. Münster
Keyword(s):  
Frequency Response ◽  
Phase Angle ◽  
Lateral Force ◽  
Force Response ◽  
Heavy Duty ◽  
Time Rate ◽  
Heavy Duty Truck ◽  
Truck Tire ◽  
Truck Tires ◽  
Road Surfaces

Abstract The cornering, or lateral force response of heavy-duty truck tires, has been evaluated on real road surfaces at speeds of 10–60 km/h. The special mobile truck tire dynamometer has a two-test-tire carriage mounted just ahead of the rear support tires of an articulated truck (tractor) trailer. Equal slip angles may be applied simultaneously to both test tires. The frequency response was evaluated by typical phase angle methods. The phase angle (lag of lateral force behind instantaneous angle) increased with frequency (time rate of application of angle) and decreased with increasing speed.

Predictive Indoor Wheel Testing of Heavy Duty Truck Tires

1987 ◽  
Vol 15 (1) ◽  
pp. 58-67
Author(s):  
R. L. Keefe
Keyword(s):  
Load Transfer ◽  
High Stress ◽  
High Load ◽  
Heavy Duty ◽  
Low Speed ◽  
Service Failures ◽  
Heavy Duty Truck ◽  
Truck Tire ◽  
Truck Tires ◽  
Load Tests

Abstract An indoor wheel test for heavy duty truck tires has been developed to predict in-service failures of commercial and developmental tires. The test, run at slow speed and high load to emphasize stress and fatigue rather than heat, is based on the premise that repeated high stress is the principal cause of in-service tire failure. These stresses occur when dynamic or transient overloads are caused by road bumps, load transfer during braking and cornering, or dual tire configuration on non-uniform surfaces. Although these overloads may occur infrequently, they can become very significant in the long distances run by truck tires. Other current heavy duty truck tire tests are generally run at higher speeds, emphasizing heat resistance of rubber compounds, or else are low-speed, much-overloaded bead tests which are unrealistically severe. Since its development in 1974 the present test has been broadly predictive for many belt, carcass, or fatigue related in-service failures of both bias and radial commercial and developmental truck tires. The test is called “The DuPont High Load Wheel Test” to distinguish it from other low-speed-high-load tests.

Reinforcing effect of reclaim rubber on natural rubber/polybutadiene rubber blends

2013 ◽  
Vol 46 ◽  
pp. 142-150 ◽  
Author(s):  
Debapriya De ◽  
Prabir Kr. Panda ◽  
Madhusudan Roy ◽  
Satyaban Bhunia
Keyword(s):  
Natural Rubber ◽  
Reinforcing Effect ◽  
Rubber Blends ◽  
Polybutadiene Rubber

scholarly journals Characterizing the Intrinsic Strength (Fatigue Threshold) of Natural Rubber/Butadiene Rubber Blends

2019 ◽  
Vol 47 (4) ◽  
pp. 292-307 ◽  
Author(s):  
Christopher G. Robertson ◽  
Radek Stoček ◽  
Christian Kipscholl ◽  
William V. Mars
Keyword(s):  
Energy Dissipation ◽  
Natural Rubber ◽  
Endurance Limit ◽  
Fatigue Threshold ◽  
Butadiene Rubber ◽  
Rubber Blends ◽  
Truck Tire ◽  
Rubber Compounds ◽  
Proper Account ◽  
Intrinsic Strength

ABSTRACT Tires require rubber compounds capable of enduring more than 108 deformation cycles without developing cracks. One strategy for evaluating candidate compounds is to measure the intrinsic strength, which is also known as the fatigue threshold or endurance limit. The intrinsic strength is the residual strength remaining in the material after the strength-enhancing effects of energy dissipation in crack tip fields are removed. If loads stay always below the intrinsic strength (taking proper account of the possibility that the intrinsic strength may degrade with aging), then cracks cannot grow. Using the cutting protocol proposed originally by Lake and Yeoh, as implemented on a commercial intrinsic strength analyzer, the intrinsic strength is determined for a series of carbon black (CB) reinforced blends of natural rubber (NR) and butadiene rubber (BR) typical of tire applications. The intrinsic strength benefits of the blends over the neat NR and BR compounds are only observed after aging at temperatures in the range from 50 to 70 °C, thus providing fresh insights into the widespread durability success of CB-filled NR/BR blends in tire sidewall compounds and commercial truck tire treads.

A Free-Rolling Cornering Test for Heavy-Duty Truck Tires

1996 ◽  
Vol 24 (2) ◽  
pp. 153-180 ◽  
Author(s):  
M. G. Pottinger ◽  
W. Pelz ◽  
G. A. Tapia ◽  
C. B. Winkler
Keyword(s):  
Vehicle Dynamics ◽  
Task Force ◽  
Test Procedure ◽  
Heavy Duty ◽  
Heavy Duty Truck ◽  
Truck Tire ◽  
Truck Tires ◽  
Background Data ◽  
Dynamics Simulations ◽  
Future Work

Abstract Under the guidance of the SAE Truck Tire Characteristics Task Force, the background to support the creation of a recommended practice for experimentally determining the free-rolling cornering properties of heavy-duty truck tires has been developed. The value of such a recommended practice lies in the establishment of a broadly accepted procedure for obtaining the free-rolling cornering data needed to represent tires in vehicle dynamics simulations of commercial trucks. This paper presents the proposed test procedure and background data. It contains a summary of the proposed test procedure, example data from CALSPAN and UMTRI using the proposed procedure, a statistical comparison of the data from CALSPAN and UMTRI, a discussion of the effect of inflation pressure on the data, a discussion of how the proposed test affects tire cornering properties and tread surface topography, and a look at the projected future work of the task force.

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