scholarly journals Silanized Silica-Encapsulated Calcium Carbonate@Natural Rubber Composites Prepared by One-Pot Reaction

Polymers ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 2668
Author(s):  
Yao Yu ◽  
Junyi Zhang ◽  
Hongzhen Wang ◽  
Zhenxiang Xin
Keyword(s):  
Mechanical Properties ◽  
Calcium Carbonate ◽  
Natural Rubber ◽  
Physical And Mechanical Properties ◽  
Dynamic Mechanical Properties ◽  
One Pot ◽  
Natural Rubber Composites ◽  
Chemical Combination ◽  
Silanized Silica ◽  
Effect Of Surface

This article demonstrates the one-pot reaction, an efficient and environmentally friendly organic synthesis method, utilized to prepare the silanized silica-encapsulated calcium carbonate@natural rubber composites (SSC@NR), following first mixing the calcium carbonate (CaCO3) solution, silica (SiO2) sol solution and a small amount of Si-69 solution, to modify the surface of CaCO3 particles, and then wet mixing with natural rubber latex. The obtained silanized silica-encapsulated calcium carbonate (SSC) particles were tested by TGA, FTIR and XRD, to substantiate the effect of surface modification. Moreover, the effects of the amount of SSC on the Mooney viscosity, curing characteristics, physical and mechanical properties and dynamic mechanical properties of the SSC@NR were investigated. The results show that the surface of modified CaCO3 is effectively coated with SiO2 particles by means of physical and chemical combination, to achieve the effect of surface coating. When the optimum amount of SSC filler is 40 phr, the SSC can form better physical adsorption and chemical combination with the NR molecular chains and can be evenly dispersed in the rubber matrix, resulting in the conspicuous improvement of physical and mechanical properties, such as the tensile strength, tear strength, elongation at break and abrasion resistance. Meanwhile, the compound with SSC has preferable processability and dynamic mechanical properties.

Microstructure and Mechanical Properties of Cement/Fly Ash/Natural Rubber Composites

2017 ◽  
Vol 866 ◽  
pp. 195-198
Author(s):  
Rakchanok Promudom ◽  
Suparut Narksitipan ◽  
Nittaya Jaitanong
Keyword(s):  
Mechanical Properties ◽  
Fly Ash ◽  
Portland Cement ◽  
Natural Rubber ◽  
Natural Rubber Latex ◽  
Physical And Mechanical Properties ◽  
Ammonia Solution ◽  
Rubber Latex ◽  
Water To Cement Ratio ◽  
Natural Rubber Composites

The physical and mechanical properties of Portland cement (PC) - natural rubber latex (NRL) - fly ash (FA) composites have been investigated. The latex per cement ratios that use in this experiment are 0, 5, 7.5 and 10% by weight of cement. Portland cement (PC) was partially replaced with fly ash 0-40% by weight of binder. Water to cement ratio were used in range of 0.305-0.385 (by weight not include water in latex). Nonionic surfactant was added in cement before mixed with natural rubber latex. In addition, to provide latex from natural rubber latex, the ammonia solution is added into natural rubber. The specimens were packing into an iron mold which sample size of 4x4x16 cm3. Moreover, the PC-NRL-FA composites were cured in water for 7 and 28 days at room temperature before measurement. Then, mechanical properties (flexural strength) and microstructure were studied.

Dynamic mechanical properties of oil palm microfibril-reinforced natural rubber composites

2010 ◽  
pp. NA-NA ◽  
Author(s):  
Shaji Joseph ◽  
Sreekumar P. Appukuttan ◽  
Jose M. Kenny ◽  
Debora Puglia ◽  
Sabu Thomas ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Natural Rubber ◽  
Oil Palm ◽  
Dynamic Mechanical Properties ◽  
Rubber Composites ◽  
Dynamic Mechanical ◽  
Natural Rubber Composites

Influence of Accelerator/Sulfur Ratio on Mechanical Properties and Thermal Resistance of Natural Rubber Containing Hybrid Fillers

2017 ◽  
Vol 744 ◽  
pp. 300-304 ◽  
Author(s):  
Sansanee Srichan ◽  
Sarawut Prasertsri
Keyword(s):  
Mechanical Properties ◽  
Calcium Carbonate ◽  
Natural Rubber ◽  
Thermal Resistance ◽  
Thermal Ageing ◽  
Hybrid Filler ◽  
Compression Set ◽  
Hybrid Fillers ◽  
Natural Rubber Composites ◽  
Two Hybrid

This research investigated the effect of accelerator/sulfur (ACC/S) ratio on mechanical properties and thermal resistance of natural rubber composites containing hybrid fillers. Two hybrid systems of 10/60 carbon black/calcium carbonate (CB/CC) and silica/calcium carbonate (SC/CC) in NR composites were focused and the different ACC/S ratios were 0.40, 0.56, 0.64 and 0.88. The results indicated that the crosslink density, hardness and tear strength of NR vulcanizates increased with increasing ACC/S ratio, whereas compression set decreased. However, tensile strength increased with increasing ACC/S ratio up to 0.64 and then it decreased when the ACC/S ratio is further increased. In addition, the vulcanizates with high ACC/S ratio, which mainly contained monosulfidic and disulfidic linkages, exhibited a greater thermal ageing resistance than that with low ACC/S ratio which contained polysulfidic linkage. Comparing in two hybrid filler systems, the reinforcement performance of CB/CC hybrid-filled is significantly higher for all ACC/S ratios investigated.

Use of Coir-Filled LLDPE as a Reinforcement for Natural Rubber Composite

2015 ◽  
Vol 659 ◽  
pp. 522-526 ◽  
Author(s):  
Manit Kaewduang ◽  
Ekrachan Chaichana ◽  
Bunjerd Jongsomjit ◽  
Adisak Jaturapiree
Keyword(s):  
Mechanical Properties ◽  
Natural Rubber ◽  
Natural Rubber Latex ◽  
Fiber Surface ◽  
Metallocene Catalyst ◽  
Dynamic Mechanical Properties ◽  
Mechanical Analysis ◽  
Rubber Composites ◽  
Dynamic Mechanical ◽  
Natural Rubber Composites

Cellulose based fibers such as sisal, jute and coir are ones of the most frequently used reinforcing fillers for composite materials including natural rubber composites because they can improve mechanical properties of their composites. However, the main disadvantages of these composites are the poor compatibility between the fiber surface and the host matrices, mainly due to the highly hydrophilic character of the fibers and the hydrophobic character of the host materials. Therefore, in this research, coir had been modified with linear low-density polyethylene (LLDPE) prior to introducing into the natural rubber composites. The coir-filled LLDPE was synthesized by in situ polymerization with MAO/metallocene catalyst, named as modified coir. The unmodified coir and modified coir were then blended with natural rubber latex to obtain natural rubber composites. The morphology and thermal dynamic mechanical properties of the composites were investigated by scanning electron microscopy (SEM), and dynamic mechanical analysis (DMA). The composites blended with the modified coir showed the better compatibility between the coir and the natural rubber than those with the unmodified coir. In addition, they also showed the greater storage modulus and lower tan delta than the unmodified counterpart and the pure natural rubber without the reinforcement.

scholarly journals The Effect of OMMT on the Properties of Vehicle Damping Carbon Black-Natural Rubber Composites

Polymers ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 1983 ◽  
Author(s):  
Wei Liu ◽  
Lutao Lv ◽  
Zonglin Yang ◽  
Yuqing Zheng ◽  
Hui Wang
Keyword(s):  
Mechanical Properties ◽  
Carbon Black ◽  
Natural Rubber ◽  
Composite System ◽  
Physical And Mechanical Properties ◽  
Damping Properties ◽  
Compression Set ◽  
Natural Rubber Composites ◽  
Rubber Composite ◽  
Processing Properties

In this study, the filled natural rubber (NR) was prepared with organic montmorillonite (OMMT) and carbon black (CB). The effects of the amount of OMMT on the properties of CB/NR composites were investigated by measuring the physical and mechanical properties, compression set and compression heat properties, processing properties and damping properties. The formulation was optimized depending on the different conditions of end applications and the damping properties of rubber were maximized without affecting the other properties of the rubber. The results showed that the rubber composite system filled with 2 phr (parts per hundreds of rubber) OMMT had better mechanical properties and excellent damping performance.

Cellulose nanofibre enabled natural rubber composites: Microstructure, curing behaviour and dynamic mechanical properties

2020 ◽  
Vol 90 ◽  
pp. 106676
Author(s):  
Upendra Kulshrestha ◽  
Tanmay Gupta ◽  
Pankaj Kumawat ◽  
Harsh Jaiswal ◽  
Subrata Bandhu Ghosh ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Natural Rubber ◽  
Dynamic Mechanical Properties ◽  
Rubber Composites ◽  
Dynamic Mechanical ◽  
Natural Rubber Composites
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