The Effect of Silane Coupling Agent on the Properties of Natural Rubber Filled with Waste Silicon Carbide

2017 ◽  
Vol 737 ◽  
pp. 236-241
Author(s):  
Apaipan Rattanapan ◽  
Pornsri Sapsrithong ◽  
Surakit Tuampoemsab
Keyword(s):  
Mechanical Properties ◽  
Silicon Carbide ◽  
Natural Rubber ◽  
Abrasion Resistance ◽  
Swelling Behavior ◽  
Peak Hardness ◽  
Rubber Compounds ◽  
Curing Characteristics ◽  
Silane Coupling ◽  
Cure Time

The effect of a silane coupling on curing characteristics, mechanical properties, abrasion behavior and swelling behavior of waste silicon carbide filled natural rubber compounds was investigated in the concentration 3%, 6%, 9%, 12% and 15% by weight of the particles. The waste silicon carbide content in this study was fixed at 30 phr in order to reveal the influence of silane-69 used to modify silicon carbide. The rubber compounds were prepared using a laboratory two roll mill with temperature maintained at 50°C. The curing characteristics of the composites were determined and the composites were vulcanized at 160°C using a hot press. The properties of the natural rubber compounds such as modulus at 200% elongation, stress at peak, hardness, abrasion resistance and swelling behavior were studied. Results indicate that the maximum torque of the natural rubber compounds increased with increasing silane-69 content whereas the silane-69 can be used without much effect on the scorch time and cure time. Increasing silane-69 content also gives natural rubber compounds better resistance towards swelling and increases the modulus at 200% elongation, tensile strength, hardness and abrasion resistance. The dispersion morphology of silicon carbide in the natural rubber composites was observed by scanning electron microscopy. The modified particles with improved interfacial adhesion between waste silicon carbide and natural rubber. Improvement in mechanical properties of the composites was obtained.

Calophyllum Inophyllum Oil as Plasticizer in Natural Rubber Compounds

2009 ◽  
Vol 25 (2) ◽  
pp. 113-128 ◽  
Author(s):  
P. Raju ◽  
V. Nandanan ◽  
Sunil K.N. Kutty
Keyword(s):  
Mechanical Properties ◽  
Natural Rubber ◽  
Thermal Studies ◽  
Calophyllum Inophyllum ◽  
Compression Set ◽  
Peak Rate ◽  
Rubber Compounds ◽  
Cure Time ◽  
Calophyllum Inophyllum Oil ◽  
Control Compound

Mechanical properties and the thermal degradation characteristics of natural rubber compounds with calophyllum inophyllum oil were compared to that of the control compound containing naphthenic oil. The compounds containing calophyllum inophyllum oil showed improved tensile strength, tear strength, modulus, compression set, abrasion resistance and resilience. Cure time was higher than the naphthenic oil mixes. Thermal studies showed an increase of 8 °C in the temperature of initiation of degradation and an increase of 6 °C in temperature at which the peak rate of degradation occurred. The peak rate of degradation was comparable to the control mix containing naphthenic oil.

Natural Rubber/Styrene Butadiene Rubber/Recycled Nitrile Glove (NR/SBR/rNBRg) Ternary Blend: Curing Characteristics and Swelling Test

2013 ◽  
Vol 594-595 ◽  
pp. 634-638 ◽  
Author(s):  
N.Z. Nik Yahya ◽  
N.Z. Noimam ◽  
Hanafi Ismail ◽  
Mohd Arif Anuar Mohd Salleh ◽  
Santiagoo Ragunathan
Keyword(s):  
Natural Rubber ◽  
Swelling Behavior ◽  
Styrene Butadiene Rubber ◽  
Ternary Blend ◽  
Butadiene Rubber ◽  
Maximum Torque ◽  
Curing Characteristics ◽  
Cure Time ◽  
Styrene Butadiene ◽  
Minimum Torque

Curing characteristics and swelling behavior of natural rubber/styrene butadiene rubber/recycled nitrile glove (NR/SBR/rNBRg) blends were investigated. Eleven composition ratio; 50/50/0, 50/40/10, 50/30/20, 50/20/30, 50/10/40, 50/0/50, 40/50/10, 30/50/20, 20/50/30, 10/50/40, and 0/50/50 of SMRL/SBR/rNBRg with the size of rNBRg ; 2.5 3.0 cm2 were prepared by using two roll mill at room temperature. Cure characteristics such as scorch time,t2, cure time,t90, minimum torque, ML, maximum torque, MH, and swelling behavior of SMRL/SBR/rNBRg ternary blends were examined. Results indicated that the scorch time and maximum torque of the NR/SBR/rNBRg blends decreased with increasing rNBRg content. The minimum torque of the blends increased as rNBRg content increased. The cure time of NR/SBR/rNBRg blends show a unique trend, which are depending on the domain rubber content. The increment in rNBRg content decreased the crosslink density of NR/SBR/rNBRg blends.

Cure Characteristic and Mechanical Properties of Epoxidized Natural Rubber/Chloroprene (ENR/CR) Blends

2010 ◽  
Vol 93-94 ◽  
pp. 631-634
Author(s):  
Chanchai Thongpin ◽  
Piyaporn Niltui ◽  
Piyapong Sornwaneenawakhun ◽  
Tossaporn Maneeprom ◽  
Saovaros Malithong ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Natural Rubber ◽  
Epoxidized Natural Rubber ◽  
Maximum Torque ◽  
Tear Strength ◽  
Rubber Compounds ◽  
Cure Time ◽  
Chloroprene Rubber ◽  
Cure Characteristic ◽  
Two Phases

Epoxidized Natural rubber (ENR) with the epoxide content of 40 % was prepared and blended with various contents of chloroprene rubber (CR) and 50 phr of carbon black. The cure characteristic, mechanical properties and the effect of gasohol E-85 on the mechanical properties of the rubber vulcanizate were studied. It was revealed from cure characteristic results, tested by Moving Die Rheometer (MDR), that minimum torque of the rubber compounds increased with the content of CR whereas maximum torque tended to increase at the content of 10 phr and decrease after this content, of which the values agreed well with the modulus at 100% elongation in rubber vulcanizates. Considering characteristic scorch and cure time, the values increased with the CR contents. It was clear from the result that at the ENR:CR ratio of 90:10, modulus of 100% elongation and tear strength exhibited the highest values. It was also found that the mechanical properties of the blend vulcanizates were slightly suffered by gasohol E85 except for tear strength. It was understood that this must be because of the effect of the phase continuity and crosslinking that occurred differently in two phases. The phase morphology of the blends were also investigated and reported in the research.

Comparison of Mechanical Properties and Curing Characteristics of Natural Rubber Composites with Different Coupling Agents

2013 ◽  
Vol 858 ◽  
pp. 24-31 ◽  
Author(s):  
Makara Lay ◽  
Azura A. Rashid ◽  
Nadras Othman ◽  
Yasuyuki Tezuka ◽  
Chhorda Pen
Keyword(s):  
Mechanical Properties ◽  
Natural Rubber ◽  
Crosslink Density ◽  
Coupling Agents ◽  
Rubber Composites ◽  
Matrix Interaction ◽  
Curing Characteristics ◽  
Natural Rubber Composites ◽  
Silane Coupling ◽  
Colored Product

Nanosilica (NS) was recently used as a filler to improve mechanical properties, morphology behaviors of natural rubber (NR) composites and also for light colored product. NS is hard to disperse in NR composite compare to carbon black due to large number of Silanol (Si-OH) group leads to strong filler-filler interaction. Silane coupling agent was extensively used to improve reinforce efficiency of NS and also for good filler-matrix interaction by reducing Si-OH group. In this study, Bis[3-(triethoxysilyl)propyl] tetrasulfide (Si-69) and (3-aminopropy)triethoxysilane (APTES) were used as a coupling agents with various loading 1.5, 3, 4.5 phr in conventional sulphur vulcanization system. Both Si69 and APTES gave a significance of the NR compound processing. However, hardness was gradually decreased up to 4.5 phr due to plasticizing effect. Si-69 can increase crosslink density because of 4 molecular of sulphur (S) and its structure retarded the curing where APTES accelerated the cured because APTES has lower molecular weight and viscosity than Si-69.

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