Curing characteristics and mechanical properties of alkali-treated grass-fiber-filled natural rubber composites and effects of bonding agent

2006 ◽  
Vol 101 (5) ◽  
pp. 3151-3160 ◽  
Author(s):  
Debasish De ◽  
Debapriya De ◽  
Basudam Adhikari
Keyword(s):  
Mechanical Properties ◽  
Natural Rubber ◽  
Bonding Agent ◽  
Rubber Composites ◽  
Curing Characteristics ◽  
Natural Rubber Composites

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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