Self-Crosslinkable Polymer Blends Based on Chlorinated Rubber and Carboxylated Nitrile Rubber

1992 ◽  
Vol 65 (1) ◽  
pp. 24-30 ◽  
Author(s):  
P. Ramesh ◽  
S. K. De
Keyword(s):  
Natural Rubber ◽  
Physical Properties ◽  
Polymer Blends ◽  
Abrasion Resistance ◽  
Elevated Temperatures ◽  
Crosslinking Agent ◽  
Nitrile Rubber ◽  
Dynamic Mechanical ◽  
Blend Composition ◽  
Mechanical Measurements

Abstract Melt-mixed blends of chlorinated natural rubber and carboxylated nitrile rubber get crosslinked during prolonged molding at elevated temperatures in the absence of any crosslinking agent. Dynamic mechanical measurements show that such blends are compatible. The physical properties depend on the blend composition. The blends exhibit excellent processing safety, good oil resistance, and high abrasion resistance.

Effect of Vulcanization Additive on Cure Characteristics and Physical Properties of Silica Filled Epoxidised Natural Rubber Truck Tyre Tread Compound

2015 ◽  
Vol 1107 ◽  
pp. 113-118
Author(s):  
Ahmad Kifli Che Aziz ◽  
Teku Zakwan Zaeimoedin ◽  
Mazlina Mustafa Kamal
Keyword(s):  
Carbon Black ◽  
Natural Rubber ◽  
Physical Properties ◽  
Abrasion Resistance ◽  
Butadiene Rubber ◽  
Cure Characteristics ◽  
Truck Tyre ◽  
Curing Systems

The challenges of using Epoxidised Natural Rubber (ENR) in truck tyre tread are to achieve good cure reversion resistant and physical properties especially on abrasion resistance towards long vulcanization time. The objectives of the project are to study the effects of vulcanization additive on cure characteristics and physical properties of silica filled ENR compound. In this work, a variation of curing systems were employed and a standard carbon black filled Natural Rubber/Butadiene Rubber (NR/BR) compound as a comparison. Greater reversion resistance and physical properties were observed with inclusion of vulcanization additive in the silica compound as compared to compound containing any. The abrasion resistance on the hand improved in spite of long vulcanisation time which commonly practices in truck tyre manufacturing.Keywords: ENR, silica, vulcanization additive, cure reversion, abrasion resistance

JESSOP-SAVILLE JO. SPECIAL

Alloy Digest ◽  
1967 ◽  
Vol 16 (7) ◽  
Keyword(s):  
High Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Tool Steel ◽  
Abrasion Resistance ◽  
Elevated Temperatures ◽  
Heat Treating ◽  
Extrusion Dies ◽  
Temperature Performance ◽  
Red Hardness

Abstract Jessop-Saville JO. Special is a basic hot work tool steel exhibiting good red-hardness and abrasion resistance at elevated temperatures. It is recommended for forging and extrusion dies. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on high temperature performance as well as heat treating, machining, and joining. Filing Code: TS-195. Producer or source: Jessop-Saville Ltd, Brightside Works.

THERMOLD H22

Alloy Digest ◽  
1965 ◽  
Vol 14 (10) ◽  
Keyword(s):  
High Temperature ◽  
Heat Resistance ◽  
Physical Properties ◽  
Abrasion Resistance ◽  
Elevated Temperatures ◽  
Heat Treating ◽  
High Heat ◽  
High Heat Resistance ◽  
Temperature Performance ◽  
High Degree

Abstract THERMOLD H22 is a tungsten-type hot work steel possessing high heat resistance and a high degree of working hardness at elevated temperatures. It is recommended where hardness and abrasion resistance are more important than toughness. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on high temperature performance as well as forming, heat treating, machining, and joining. Filing Code: TS-170. Producer or source: Cyclops Corporation.

STORA ASP 23

Alloy Digest ◽  
1978 ◽  
Vol 27 (6) ◽  
Keyword(s):  
Wear Resistance ◽  
Physical Properties ◽  
Abrasion Resistance ◽  
High Speed ◽  
Elevated Temperatures ◽  
Cold Work ◽  
Heat Treating ◽  
Complicated Shape ◽  
Size Stability ◽  
Special Steels

Abstract STORA ASP 23 high-speed tool steel offers very good abrasion resistance and resistance to softening at elevated temperatures. The excellent size stability and good grindability of this steel make it highly suitable for tools of complicated shape, such as hobs, broaches and threading dies. The high combination of wear resistance, tensile properties and toughness make ASP 23 suitable also for cold-work tools. This datasheet provides information on composition, physical properties, and elasticity. It also includes information on forming, heat treating, and machining. Filing Code: TS-334. Producer or source: Stora Kopparberg, Special Steels Division.

Interaction between Carboxylated Nitrile Rubber and Precipitated Silica: Role of (3-Aminopropyl)Triethoxysilane

1996 ◽  
Vol 69 (4) ◽  
pp. 637-647 ◽  
Author(s):  
Sumanda Bandyopadhyay ◽  
P. P. De ◽  
D. K. Tripathy ◽  
S. K. De
Keyword(s):  
Physical Properties ◽  
Coupling Agent ◽  
Spectroscopic Studies ◽  
Nitrile Rubber ◽  
Dynamic Mechanical ◽  
Precipitated Silica ◽  
Silica Filler ◽  
Bound Rubber ◽  
Rubber Filler

Abstract On the basis of measurements of bound rubber and physical properties and the results of Monsanto rheometer, dynamic mechanical and infrared spectroscopic studies, it is observed that strong rubber-filler interaction occurs between XNBR and precipitated silica filler. During molding, XNBR was found to be crosslinked by the filler surface through the formation of primary bonds. The coupling agent, namely (3-aminopropyl)triethoxysilane facilitates the formation of rubber-filler bonds at the expense of filler-filler networks, leading to improved dispersion and enhanced degree of crosslinking.

Polybutadienes of Controlled Cis, Trans and Vinyl Structures

1959 ◽  
Vol 32 (2) ◽  
pp. 614-627 ◽  
Author(s):  
J. N. Short ◽  
G. Kraus ◽  
R. P. Zelinski ◽  
F. E. Naylor
Keyword(s):  
Tensile Strength ◽  
Low Temperature ◽  
Natural Rubber ◽  
Physical Properties ◽  
Abrasion Resistance ◽  
High Hardness ◽  
High Modulus ◽  
High Tensile Strength ◽  
Truck Tires ◽  
Wide Range

Abstract The physical properties of polybutadiene vulcanizates have been measured as a function of polymer microstructure. Although the over-all properties of any one polybutadiene are determined by the relative ratio of cis, trans and vinyl units in the polymer chain, marked changes in physical properties do not occur until a relatively pure configuration is approached or unless the raw polymer displays crystallinity. Thus, polybutadienes containing more than 85 per cent cis, trans or vinyl units are characteristically different from each other and the differences are accentuated as the isomeric forms approach 100 per cent of a given configuration. Polybutadiene of 95 per cent cis configuration displays very low heat generation and high resilience (equaling natural rubber in these properties) and excellent abrasion resistance. trans-Polybutadiene (90 per cent), a crystalline plastic in the raw state, becomes rubbery after vulcanization. Gum vulcanizates possess high tensile strength, and tread stocks display high modulus and tensile strength, high hardness and fair hysteresis properties. Vulcanizates of amorphous 94 per cent vinyl polybutadiene are characterized by fair tensile properties, low hysteresis, and poor low temperature properties. Crystalline syndiotactic polybutadiene, 70 per cent vinly, displays much higher gum and tread tensile strengths than its amorphous counterpart. Amorphous polybutadienes containing less than 70–80 per cent of any one configuration are generally similar in most properties, and resemble emulsion polybutadiene in many respects. The wide range of properties of the various polybutadienes makes them suitable for many applications. cis-Polybutadiene is an excellent tire rubber, which has given as much as 40 per cent greater abrasion resistance than natural rubber in passenger tire tests. Heavy duty 10:00 × 20 truck tires fabricated with a 1:1 blend of cis-polybutadiene and natural rubber in the treads have given slightly better abrasion ratings and lower running temperatures than control tires fabricated entirely from natural rubber. Amorphous 80 per cent cis-polybutadiene has been found to possess exceptionally good low temperature properties, far superior to present arctic-type unsaturated elastomers, trans-Polybutadienes by virtue of their high modulus, high tensile strength, and high hardness could be utilized in the preparation of hard rubber goods, floor tiles, and shoe soles. While none of these polybutadienes is yet available commercially, their unusual properties and potential applicability in many areas should lead to their manufacture in the future.

REX M3S-2 and CPM REX M3S-2

Alloy Digest ◽  
1973 ◽  
Vol 22 (8) ◽  
Keyword(s):  
Grain Size ◽  
Physical Properties ◽  
Tool Steel ◽  
Abrasion Resistance ◽  
High Speed ◽  
Elevated Temperatures ◽  
Heat Treating ◽  
Quality Product ◽  
Metallurgy Process ◽  
Specialty Metals

Abstract REX M3S-2 is a sulfur-bearing high-speed tool steel offering very good abrasion resistance and resistance to softening at elevated temperatures. CPM REX M3S-2, produced by the Crucible Particle Metallurgy process, is an improved-quality product with finer grain size, better toughness and better grindability than the conventionally produced REX M3S-2. Other characteristics and properties of the two products are very similar (See General Characteristics for more details). This datasheet provides information on composition, physical properties, hardness, and elasticity. It also includes information on forming, heat treating, and machining. Filing Code: TS-260. Producer or source: Crucible Specialty Metals Division, Colt Industries.

scholarly journals Effects of Epoxidised Natural Rubber on the Oil Resistance Property of NBR/ENR Blends used for Safety Footwear Application

2019 ◽  
Vol 7 (4.14) ◽  
pp. 322
Author(s):  
H. Mohd Hanif ◽  
K. C. Yong
Keyword(s):  
Natural Rubber ◽  
Physical Properties ◽  
Tensile Properties ◽  
Volume Change ◽  
Abrasion Resistance ◽  
Sustainable Material ◽  
Oil Resistance ◽  
Abrasion Loss ◽  
Resistance Property ◽  
Footwear Industry

Epoxidised natural rubber, ENR has emerged as a sustainable material for many applications due to its unique properties. This study sets out to investigate the effects of ENR on the oil resistance property of nitrile rubber, NBR composites used for safety footwear application. Blends of NBR/ENR i.e. 100/0, 90/10, 80/20, 70/30, 60/40 and 50/50 were prepared and tested for their oil resistance property and other physical properties such as hardness, tensile properties and abrasion loss. Results showed that varying the amount of ENR did not significantly affect the hardness and tensile properties of the composites. Nonetheless, it was found that ENR content highly influences the abrasion loss of the composites in which the abrasion resistance decreased with further addition of ENR contents. Despite the increase in oil swelling of the composites with increasing ENR content, the oil swelling values are considered low (< 5% volume change), indicating superior oil resistance property of the composites. These results confirm the possibility of ENR as a sustainable material for the production of eco-friendly composites with high oil resistance property for the footwear industry.  

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