Effect of dispersion preparation technique of calcium carbonate (CaCO3) fillers on mechanical properties of natural rubber (NR) latex films

2017 ◽  
Author(s):  
Fairus Mazlia Mat Suki ◽  
Azura A. Rashid
Keyword(s):  
Mechanical Properties ◽  
Calcium Carbonate ◽  
Natural Rubber ◽  
Preparation Technique ◽  
Latex Films

Characterization of Snap-On Calf Nipple Product and Development of its Compound Formulation Based on Natural Rubber

2017 ◽  
Vol 744 ◽  
pp. 282-287
Author(s):  
Sarawut Prasertsri ◽  
Sansanee Srichan
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Calcium Carbonate ◽  
Carbon Black ◽  
Natural Rubber ◽  
Soxhlet Extraction ◽  
Rubber Compound ◽  
Rubber Compounds ◽  
Rubber Component

This research aimed to develop the formulation of natural rubber filled with carbon black, silica and calcium carbonate for rubber calf nipple application. The reverse engineering was performed on the calf nipple product to analyze the rubber type and component by using Soxhlet extraction, thermogravimetric analysis (TGA) and Fourier transform infrared spectroscopy (FTIR) techniques. Furthermore, mechanical properties were examined to act as benchmark for the rubber compound design. The results showed that rubber component in the nipple product was natural rubber, whereas two filler types revealed as carbon black and calcium carbonate with 10 and 35 of the total weight. In addition, rubber nipple showed the hardness of 46±1 Shore A and tensile strength of 5.3±0.60 MPa. From the investigation of the properties of developed rubber compounds in this work, it was found that the mechanical properties depended on type and content of filler. The required mechanical properties of vulcanizates were achieved at 20 phr of carbon black (N330), 20 phr of silica and 120 phr of calcium carbonate.

MIXING SEQUENCE IN NATURAL RUBBER CONTAINING ORGANOCLAY AND NANO–CALCIUM CARBONATE TERNARY HYBRID NANOCOMPOSITES

2013 ◽  
Vol 86 (2) ◽  
pp. 330-341 ◽  
Author(s):  
Hedayatollah Sadeghi Ghari ◽  
Azam Jalali Arani ◽  
Zahra Shakouri
Keyword(s):  
Mechanical Properties ◽  
Calcium Carbonate ◽  
Natural Rubber ◽  
Research Field ◽  
Hybrid Nanocomposites ◽  
Melt Mixing ◽  
Filler Phase ◽  
Mixing Sequence ◽  
Single Filler ◽  
Morphology And Mechanical Properties

ABSTRACT Rubber nanocomposites containing one type of nanofiller are common and are widely established in the research field. In this study, natural rubber (NR) based ternary nanocomposites containing both calcium carbonate and organoclay have been characterized on the basis of morphology, cure characteristics, and physico-mechanical behavior. Natural rubber nanocomposite samples containing modified silicate (Cloisite 15A) and also nano-carbonate calcium were prepared using a laboratory internal mixer. The effect of the mixing sequence on the morphology and mechanical properties of the samples was investigated. Based on results of morphology and mechanical properties, the dual fillers phase nanocomposites (hybrid nanocomposite) perform better in comparison with single filler phase nanocomposites. The reinforcing capability of nano-CaCO3 and organoclay in NR was characterized by means of cure rheometry, morphology, and mechanical properties. NR/single filler phase and two filler phase nanocomposites were prepared by simple melt mixing method. Concentration of nano-CaCO3 and organoclay in NR was 10 and 5 parts per one hundred parts of rubber by weight, respectively. The microstructure and homogeneity of the compounds was confirmed by studying the dispersion of nanoparticles in NR via X-ray diffraction and field emission scanning electron microscopy. A more pronounced effect was achieved by using dual filler based nanocomposites as compared with single filler phase nanocomposites. The obtained results reveal that hybrid nanocomposites have more adequate morphology, rheometery, and mechanical behaviors as well as swelling resistance. The effect of mixing sequence of fillers has been studied in detail. Simultaneous addition of the two nanofillers to the NR compound would lead to better nanocomposite properties compared with other mixing sequences. Also, the results show that the mixing sequence of these nanofillers in NR has little effect on the performance of the nanocomposite.

Comparison of Reinforcing Efficiency between Calcium Carbonate/Carbon Black and Calcium Carbonate/Silica Hybrid Filled Natural Rubber Composites

2018 ◽  
Vol 382 ◽  
pp. 94-98 ◽  
Author(s):  
Sarawut Prasertsri ◽  
Chaiwute Vudjung ◽  
Wunchai Inthisaeng ◽  
Sansanee Srichan ◽  
Kanchana Sapprasert ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Calcium Carbonate ◽  
Carbon Black ◽  
Natural Rubber ◽  
Hybrid System ◽  
Hybrid Composites ◽  
Strength Increase ◽  
Hybrid Filler ◽  
Carbonate Carbon ◽  
Cure Time

The present research aimed to develop natural rubber (NR) hybrid composites reinforced with calcium carbonate/carbon black (CC/CB) and calcium carbonate/silica (CC/SC). The influence of CC/CB and CC/SC with various filler ratios (120/0, 90/5, 60/10, 30/15 and 0/20) on cure characteristics and mechanical properties of the vulcanizates was investigated and their reinforcing efficiency was compared. It has been found that incorporation of CB in the hybrid filler decreases the scorch time and cure time but increases crosslink density, whereas the incorporation of silica showed cure retardation. As CB or SC content increases, stiffness, tensile strength and tear strength increase, while elongation at break and compression set decrease. Scanning electron microscopy studies also reveal poor filler dispersion and poor adhesion between filler particles and matrix in the vulcanizates with increasing in CC content in a weight filler ratio which causes inferior mechanical properties. Incorporation of CB or SC content enhanced the mechanical properties of the vulcanizates, where CC/CB hybrid system exhibited higher reinforcing efficiency compared with CC/SC hybrid system.

Improving oxidation stability and mechanical properties of natural rubber vulcanizates filled with calcium carbonate modified by gallic acid

2010 ◽  
Vol 66 (7) ◽  
pp. 965-977 ◽  
Author(s):  
Sirilux Poompradub ◽  
Thirapat Luthikaviboon ◽  
Srisuwan Linpoo ◽  
Rojrit Rojanathanes ◽  
Pattarapan Prasassarakich
Keyword(s):  
Mechanical Properties ◽  
Calcium Carbonate ◽  
Natural Rubber ◽  
Gallic Acid ◽  
Oxidation Stability ◽  
Natural Rubber Vulcanizates

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.

Influence of Filler Types on Mechanical Properties and Cure Characteristics of Natural Rubber Composites

2011 ◽  
Vol 264-265 ◽  
pp. 646-651 ◽  
Author(s):  
Wittawat Wongsorat ◽  
Nitinat Suppakarn ◽  
Kasama Jarukumjorn
Keyword(s):  
Mechanical Properties ◽  
Calcium Carbonate ◽  
Carbon Black ◽  
Natural Rubber ◽  
Sisal Fiber ◽  
Maximum Torque ◽  
Cure Characteristics ◽  
Roll Mill ◽  
Fiber Treatment ◽  
Cure Time

Natural rubber (NR) was reinforced with three types of filler: carbon black, calcium carbonate, and sisal fiber. NR composites were prepared on a two-roll mill. Filler content was 20 phr. Mechanical properties and cure characteristics of NR composites were studied. All NR composites had higher maximum torque than NR. NR filled with carbon black showed the highest maximum torque. However, scorch time and cure time of the NR composites were not much affected by filler types. In addition, influence of fiber treatment (alkalization) on mechanical properties and cure characteristics of sisal fiber-NR composites was investigated. Alkali treated sisal fiber-NR composite exhibited higher tensile properties and hardness than untreated sisal fiber- NR composite due to improved adhesion between the fiber and NR matrix. Moreover, alkali treated sisal fiber-NR composite had superior specific modulus and strength than NR composites filled with carbon black and calcium carbonate.

Water Diffusion in Natural Rubber Vulcanizates: Effect of Ingredient Loading on Swelling and Mechanical Properties

2016 ◽  
Vol 705 ◽  
pp. 30-34
Author(s):  
Abhel Y. Ananoria ◽  
Bryan B. Pajarito
Keyword(s):  
Mechanical Properties ◽  
Calcium Carbonate ◽  
Natural Rubber ◽  
Material Properties ◽  
Fractional Factorial Design ◽  
Water Diffusion ◽  
Deionized Water ◽  
Fractional Factorial ◽  
Used Oil ◽  
Natural Rubber Vulcanizates

The effect of compounding ingredients to swelling and mechanical properties of vulcanized natural rubber (NR) in deionized water at 80°C was investigated. Rubber sheets are compounded according to a fractional factorial design of experiment, where ingredients are treated as factors varied at two levels of loading. Results show that sulfur, used oil, calcium carbonate (CaCO3), reclaimed rubber, asphalt, diphenyl guanidine (DPG), mercaptobenzothiazole (MBT), and mercaptobenzothiazole disulfide (MBTS) are some of the significant ingredients of the formulation affecting the material properties of vulcanized NR. Among the compounding ingredients, sulfur and used oil are the most influential and consistent factors which affect the swelling and tensile properties of vulcanized NR during water diffusion.

Reinforcement of Natural Rubber Latex Film by Starch Nanocrystal

2014 ◽  
Vol 543-547 ◽  
pp. 3886-3891 ◽  
Author(s):  
Yang Jian Shu Gao ◽  
Sen Zhao ◽  
Shuang Quan Liao ◽  
Lin Fang ◽  
Zhi Fen Wang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Natural Rubber ◽  
Acid Hydrolysis ◽  
Mechanical Stability ◽  
Natural Rubber Latex ◽  
Crosslinking Density ◽  
Latex Film ◽  
Latex Films ◽  
Rubber Latex ◽  
Starch Nanocrystals

Starch nanocrystals obtained from acid hydrolysis, and the starch/natural rubber latex film was prepared by blending the starch nanocrystals with natural rubber latex. The latex properties such as viscosity and mechanical stability, water and toluene uptake, crosslinking density and mechanical properties of the latex films were investigated. The results showed that the mechanical stability of natural rubber latex reinforced by starch nanocrystals increased, but the change of viscosity was not obvious. By adding starch nanocrystals in natural rubber latex, the swelling by toluene decreases and the swelling by water increased. The mechanical properties and crosslinking density of films were enhanced with the increase of starch loading.

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