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.

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.

scholarly journals Effect of carbon nanotubes and nanodiamonds on the heat storage ability of natural rubber composites

2020 ◽  
pp. 009524432093397
Author(s):  
Minna Poikelispää ◽  
Mari Honkanen ◽  
Minnamari Vippola ◽  
Essi Sarlin
Keyword(s):  
Thermal Conductivity ◽  
Carbon Nanotubes ◽  
Natural Rubber ◽  
Phase Change Materials ◽  
Heat Storage ◽  
High Energy ◽  
Rubber Composites ◽  
Natural Rubber Composites ◽  
Heat Storage Materials ◽  
Vulcanization Process

Phase change materials are utilized in heat storage applications, as they have high latent heat during the phase transition. In addition, high thermal conductivity is required from the heat storage materials to achieve high energy efficiency. In this study, the effect of carbon nanotubes (CNTs) and nanodiamonds (NDs) on the thermal conductivity and the heat storage capacity of the paraffin–natural rubber composites was studied. It was found that the CNTs work better than NDs in such composites. They increase thermal conductivity significantly and thus improve the heat transfer rate of the composite. They were also found to prevent the migration of paraffin out of the rubber during the vulcanization process, which increases the lifetime of the composite.

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.

Modified graphite filled natural rubber composites with good thermal conductivity

2015 ◽  
Vol 23 (5) ◽  
pp. 853-859 ◽  
Author(s):  
Junping Song ◽  
Lianxiang Ma ◽  
Yan He ◽  
Haiquan Yan ◽  
Zan Wu ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Natural Rubber ◽  
Rubber Composites ◽  
Natural Rubber Composites
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