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

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.

scholarly journals Rheometer Evidences for the Co-Curing Effect of a Bismaleimide in Conjunction with the Accelerated Sulfur on Natural Rubber/Chloroprene Rubber Blends

Polymers ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1510
Author(s):  
Marek Pöschl ◽  
Shibulal Gopi Sathi ◽  
Radek Stoček ◽  
Ondřej Kratina
Keyword(s):  
Mechanical Properties ◽  
Natural Rubber ◽  
Tensile Properties ◽  
Crosslinking Agent ◽  
Alder Reaction ◽  
Diels Alder ◽  
Ene Reactions ◽  
Rubber Blends ◽  
Diels Alder Reaction ◽  
Chloroprene Rubber

The rheometer curing curves of neat natural rubber (NR) and neat chloroprene rubber (CR) with maleide F (MF) exhibit considerable crosslinking torque at 180 °C. This indicates that MF can crosslink both these rubbers via Alder-ene reactions. Based on this knowledge, MF has been introduced as a co-crosslinking agent for a 50/50 blend of NR and CR in conjunction with accelerated sulfur. The delta (Δ) torque obtained from the curing curves of a blend with the addition of 1 phr MF was around 62% higher than those without MF. As the content of MF increased to 3 phr, the Δ torque was further raised to 236%. Moreover, the mechanical properties, particularly the tensile strength of the blend with the addition of 1 phr MF in conjunction with the accelerated sulfur, was around 201% higher than the blend without MF. The overall tensile properties of the blends cured with MF were almost retained even after ageing the samples at 70 °C for 72 h. This significant improvement in the curing torque and the tensile properties of the blends indicates that MF can co-crosslink between NR and CR via the Diels–Alder reaction.

Reinforcing efficiency and compatibilizing effect of sol–gel derived in situ silica for natural rubber/chloroprene rubber blends

RSC Advances ◽  
2014 ◽  
Vol 4 (102) ◽  
pp. 58816-58825 ◽  
Author(s):  
Bharat P. Kapgate ◽  
Chayan Das
Keyword(s):  
Natural Rubber ◽  
Sol Gel ◽  
Rubber Blends ◽  
In Situ Silica ◽  
Chloroprene Rubber ◽  
Compatibilizing Effect

The strong CR/in situ silica interaction causes filler accumulation at the interphase and enhances the compatibility and reinforcement in the NR/CR blend.

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