Fumed and precipitated silica reinforced natural rubber composites prepared from latex system: Mechanical and dynamic properties

2012 ◽  
Vol 31 (5) ◽  
pp. 593-605 ◽  
Author(s):  
Sarawut Prasertsri ◽  
Nittaya Rattanasom
Keyword(s):  
Natural Rubber ◽  
Dynamic Properties ◽  
Rubber Composites ◽  
Precipitated Silica ◽  
Natural Rubber Composites

The Partial Replacement of Halloysite Nanotubes (HNTs) and Precipitated Silica by Recycled Poly(ethylene Terephthalate) Powder on Cure Behavior, Tensile Properties and Morphology of Natural Rubber Composites

2011 ◽  
Vol 471-472 ◽  
pp. 622-627 ◽  
Author(s):  
H. Nabil ◽  
Hanafi Ismail ◽  
A.R. Azura
Keyword(s):  
Natural Rubber ◽  
Tensile Properties ◽  
Morphological Characteristics ◽  
Halloysite Nanotubes ◽  
Partial Replacement ◽  
Rubber Matrix ◽  
Tensile Fracture ◽  
Rubber Composites ◽  
Precipitated Silica ◽  
Natural Rubber Composites

In this article, halloysite nanotubes (HNTs) and precipitated silica were replaced by recycled polyethylene terephthalate powder (R-PET) in natural rubber composites. Five different compositions of NR/HNTs/R-PET and NR/Silica/R-PET composites [i.e. 100/20/0, 100/15/5, 100/10/10, 100/5/15, and 100/0/20 parts per hundred rubber (phr)] were prepared on a two-roll-mill. Comparison of the curing behavior, tensile properties, and morphological characteristics of natural rubber composites was studied. The results indicated that the replacement of HNTs and silica by R-PET decreased the tensile strength, tensile modulus, and elongation at break of composites, but NR/Silica/R-PET composites showed the lower trend than that NR/HNTs/R-PET did. The negative effect of these properties could be explained by the decrement of crosslink density, R-PET is unable to be transferred the stress due to the weal rubber-fillers interactions, and the reducing of ductility of rubber matrix. The curing results revealed that, with replacement of HNTs and Silica by R-PET, the scorch time (ts2) and cure time (tc90) were decreased. Scanning electron microscopy investigation of tensile fracture surfaces confirmed that co-incorporation of NR/HNTs/R-PET would improve the dispersion of R-PET and enhanced the interactions between fillers and NR matrix rather than NR/Silica/R-PET composites.

Antioxidation efficiency and reinforcement performance of precipitated-silica-based immobile antioxidants obtained by a sol method in natural rubber composites

RSC Advances ◽  
2015 ◽  
Vol 5 (112) ◽  
pp. 92344-92353 ◽  
Author(s):  
Haitao Wei ◽  
Junjun Zhou ◽  
Jing Zheng ◽  
Guangsu Huang
Keyword(s):  
Natural Rubber ◽  
Rubber Composites ◽  
Precipitated Silica ◽  
Natural Rubber Composites ◽  
Oxidation Performance

This precipitated-silica-based immobile antioxidant (P-RT) possesses outstanding reinforcement and anti-oxidation performance in an NR matrix. E.g. the NR/P-RT composite is far longer than NR composites containing the general antioxidant 4010NA.

Effect of Aluminum Powder on Filled Natural Rubber Composites

2001 ◽  
Vol 74 (2) ◽  
pp. 236-248 ◽  
Author(s):  
V. S. Vinod ◽  
Siby Varghese ◽  
Rosamma Alex ◽  
Baby Kuriakose
Keyword(s):  
Thermal Conductivity ◽  
Natural Rubber ◽  
Aluminum Powder ◽  
Oxidative Degradation ◽  
General Purpose ◽  
Rubber Composites ◽  
Precipitated Silica ◽  
Rubber Compounds ◽  
Furnace Black ◽  
Natural Rubber Composites

Abstract The effect of aluminum powder on the properties of natural rubber composites containing high abrasion furnace black (HAF), general purpose furnace black (GPF), acetylene black, china clay and precipitated silica was studied. In all cases the total filler content including aluminum powder is fixed at 40 parts per hundred rubber (phr). Gradual replacement of these fillers by aluminum powder showed a marked increase in thermal conductivity. This increased thermal conductivity of aluminum powder filled composites decreased the vulcanization time and led to uniform curing throughout the material, especially for thick articles. Mechanical properties like tensile strength, tear strength, rebound resilience, heat build-up, hardness, compression set, etc., are comparatively better for these composites. Aluminum powder incorporated vulcanizates also showed good resistance against thermal aging and oxidative degradation. Thus, use of aluminum powder in rubber compounds can lead to energy saving in the vulcanization of thick rubber articles and enhance the service life of such rubber products.

Evaluation of vibration damping behavior of different sizes of waste tyre rubber in natural rubber composites

2017 ◽  
Vol 52 (18) ◽  
pp. 2493-2501 ◽  
Author(s):  
V Chandran ◽  
Lenin Nagarajan ◽  
Manvel Raj Thomas
Keyword(s):  
Natural Rubber ◽  
Hydraulic Press ◽  
Design Criterion ◽  
Vibration Damping ◽  
Rubber Composites ◽  
Precipitated Silica ◽  
Damping Behavior ◽  
Natural Rubber Composites ◽  
Rubber Particles ◽  
Waste Tyre

The different sizes of waste tyre rubber particles and precipitated silica-filled natural rubber composites were investigated to evaluate the vibration damping behavior of the waste tyre rubber filled rubber composites. In this work, waste tyre rubber particles prepared in three different sizes (100–250, 550–700, and 1000–1150 µm) using ambient grinding process. Then the particles blended with natural rubber and silica compounds, and the blend was synthesized by two roll mill and hydraulic press vulcanization. The various proportions of prepared samples in all sizes were characterized in respect of their vibration damping behavior. The results indicated that large size of waste tyre rubber-filled natural rubber composites showed excellent vibration damping performance compared with other sizes used and were evaluated by both direct and indirect methods. Differential scanning calorimeter study showed that, use of large waste tyre rubber provided more energy absorption than other sizes used which led to increase the damping characterization. Owing to excellent damping performance, large waste tyre rubber-filled natural rubber composites accurately used in the applications where vibration damping is considered as important design criterion.

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