Curing characteristics, morphology, thermal stability, mechanical properties, and irradiation resistance of methylethylsilicone/methylphenylsilicone rubber blends

2014 ◽  
Vol 131 (15) ◽  
pp. n/a-n/a ◽  
Author(s):  
Depeng Ma ◽  
Jinglin Tan ◽  
Yuling Li ◽  
Chao Bian ◽  
Guogang Wang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Rubber Blends ◽  
Curing Characteristics ◽  
Irradiation Resistance

scholarly journals Application of Silica Supported Calix[4]arene Derivative as Anti-reversion Agent in Tire Tread Formulation

2021 ◽  
Vol 68 (1) ◽  
pp. 128-136
Author(s):  
Hediye Mohamadi ◽  
Fereshteh Motiee ◽  
Saeed Taghvaei-Ganjali ◽  
Mandana Saber-Tehrani
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Temperature Rise ◽  
Tensile Testing ◽  
Polymer Chains ◽  
Arene Derivative ◽  
Oh Groups ◽  
Test Pieces ◽  
Curing Characteristics ◽  
Thermal Stability Of

In this research the influence of the silica supported calix[4]arene derivative (SS-Calix) on the reversion resistance, mechanical properties and thermal behavior of NR/BR tire tread formulation was investigated by the oscillating disc rheometer, FTIR, TGA and tensile testing. The results revealed that the reversion behavior of NR/BR vulcanizate is affected by SS-Calix. The data obtained from curing characteristics and thermal stability of test pieces indicate that, SS-Calix acts as an anti-reversion for rubbery materials that are exposed to thermal shock in the early stages of temperature rise. It’s predicted that these results are due to the interaction between the OH groups present in the SS-Calix surface and the carbon of the polymer chains. The broad peak observed in the IR spectrum around 1824 cm−1 which is referred to C=O bond, confirms this prediction. In addition, the presence of SS-Calix in compound causes to increase modulus and hardness but reduce elongation and resilience.

The Effect of the Vulcanizing System on Cure and Mechanical Properties of Nbr/Epdm Blends

2001 ◽  
Vol 9 (7) ◽  
pp. 459-468 ◽  
Author(s):  
Marcia G. Oliveira ◽  
Bluma G. Soares
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Glass Transition ◽  
Crosslink Density ◽  
Mechanical Performance ◽  
The Other ◽  
Glass Transition Temperatures ◽  
Sulphur Concentration ◽  
Curing Characteristics ◽  
Accelerator System

The effect of the curing system and curing parameters, mechanical properties, ageing resistance, and crosslink density of NBR/EPDM blends has been investigated. The curing characteristics of the blends were affected by the accelerator type and the sulphur concentration. The sulphur/benzothiazyl-disulphide (S/MBTS) vulcanizing system offered the best scorch safety, whereas those single and binary accelerator systems based on tetramethyl thiuram disulphide (TMTD) provided faster cure. The MBTS single accelerator system was able to crosslink the EPDM phase better and consequently displayed better mechanical performance than the other systems based on tetramethyl thiuram disulphide (TMTD). Higher thermal stability was also achieved in blends containing higher levels of sulphur, probably because of increased crosslinking in the EPDM phase. The results of dynamic mechanical investigations showed differences in the glass transition temperatures, which increased with increasing of the sulphur content in both S/MBTS and S/MBTS/TMTD vulcanizing systems. Formulations based on S/TMTD single accelerator systems gave the lowest values of Tg, and the amount of sulphur did not affect this property.

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