The Compounding of Hard GR-S

1944 ◽  
Vol 17 (3) ◽  
pp. 704-710
Author(s):  
Ross E. Morris ◽  
Philip Mitton ◽  
Irvin P. Seegman ◽  
Theodore A. Werkenthin
Keyword(s):  
Tensile Strength ◽  
Ultimate Elongation

Abstract A survey has been made of hard GR-S with regard to sulfur requirement and effects of various pigments, softeners, and accelerators on tensile strength, ultimate elongation, hardness, and stiffness. Of particular interest where the observations that hard GR-S had a higher tensile strength than hard Hevea rubber, and that hard GR-S did not undergo much loss in tensile strength when compounded with 60 volumes of channel black or semi-reinforcing black.

Time and Temperature Dependence of the Ultimate Properties of an SBR Rubber at Constant Elongations

1961 ◽  
Vol 34 (3) ◽  
pp. 897-909
Author(s):  
Thor L. Smith ◽  
Paul J. Stedry
Keyword(s):  
Tensile Strength ◽  
Strain Rate ◽  
Temperature Dependence ◽  
Rate Dependence ◽  
Strain Rates ◽  
Type Specimens ◽  
Stress Strain ◽  
Ultimate Elongation ◽  
Tensile Tester ◽  
Ultimate Properties

Abstract A study was made previously of the temperature and strain rate dependence of the stress at break (tensile strength) and the ultimate elongation of an unfilled SBR rubber. In that study, stress-strain curves to the point of rupture were measured with an Instron tensile tester on ring type specimens at 14 temperatures between −67.8° and 93.3° C, and at 11 strain rates between 0.158×10−3 and 0.158 sec−1 at most temperatures. The tensile strength was found to increase with both increasing strain rate and decreasing temperature. At all temperatures above −34.4° C, the ultimate elongation was likewise found to increase with increasing strain rate and decreasing temperature but at lower temperatures the opposite dependence on rate was observed; at −34.4° C, the ultimate elongation passed through a maximum with increasing rate.

Study on Conductive Polypyrrole/P(Ba-co-Aa)-g-PMMA-GMA Composites

2014 ◽  
Vol 904 ◽  
pp. 111-116
Author(s):  
Shi Biao Zhou ◽  
An Guo Xiao ◽  
Xiao Bing Huang ◽  
Zhen Gan Chen ◽  
Yuan Dao Chen ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Molar Ratio ◽  
Polymerization Time ◽  
High Tensile Strength ◽  
Ultimate Elongation ◽  
Preparation Conditions ◽  
Conductive Polypyrrole

A novel PPy/P(BA-co-AA)-g-PMMA-GMA (terpolymer) composites were prepared and the preparation conditions, characterization and properties of the composites were investigated. The results indicate that the oxidant types, molar ratio of oxidant/monomer, polymerization time, PPy content affect greatly the conductivity of the PPy/terpolymer composites. The ultimate elongation of composites decreases with increasing PPy content,while high PPMM content brings forth high tensile strength.

Oxygen Absorption of Vulcanizates. A Means of Evaluating Aging Resistance

1950 ◽  
Vol 23 (2) ◽  
pp. 425-439
Author(s):  
Louis R. Pollack ◽  
Robert E. McElwain ◽  
Paul T. Wagner
Keyword(s):  
Tensile Strength ◽  
Physical Properties ◽  
Absorption Measurement ◽  
Oxygen Absorption ◽  
Oxygen Bomb ◽  
Ultimate Elongation ◽  
Synthetic Rubber ◽  
Standard Procedures ◽  
Aging Resistance

Abstract The rates of oxygen absorption of two natural and six synthetic-rubber stocks have been measured. In addition, the course of aging in the oxygen bomb and air oven was followed by means of changes in tensile strength and in ultimate elongation of the same eight stocks. Correlation between rates of oxygen absorption and deterioration of physical properties is close enough to justify substitution of a rapid oxygen absorption measurement for longer standard procedures in evaluating the aging characteristics of rubber stocks.

Molecular Theory for the Tensile Strength of Gum Elastomers

1964 ◽  
Vol 37 (4) ◽  
pp. 808-817 ◽  
Author(s):  
F. Bueche ◽  
J. C. Halpin
Keyword(s):  
Tensile Strength ◽  
Creep Curve ◽  
Viscoelastic Properties ◽  
Butyl Rubber ◽  
Molecular Theory ◽  
Creep Response ◽  
Failure Curve ◽  
Ultimate Elongation ◽  
Propagating Crack ◽  
Ultimate Properties

Abstract The tensile strength and ultimate elongation properties of any given amorphous elastomer can be described by a characteristic failure curve. It is shown in this paper that the failure curve can be predicted from a knowledge of the creep curve of the elastomer together with the data from a Mooney-Rivlin plot. The theory relating the ultimate properties to the viscoelastic properties of the elastomer is based upon the idea of a propagating crack, the rate of propagation being limited by viscoelastic mechanisms. Data for the failure curves and creep response for EPR and SBR elastomers are presented and shown to support the theory. Literature data for butyl rubber are also shown to confirm the theory.

The Inhibitory Effect of Polypropylene Fibers towards the Shrinkage of Cement Based Material

2015 ◽  
Vol 744-746 ◽  
pp. 1531-1534
Author(s):  
Hua Yuan ◽  
Yun Hua Li
Keyword(s):  
Tensile Strength ◽  
Inhibitory Effect ◽  
Polypropylene Fibers ◽  
Practical Application ◽  
Ultimate Elongation ◽  
Cement Based Materials ◽  
At Home

At present, polymers, fiber and other additives are added to the cement based materials by researchers at home and abroad for the purpose of dealing with the difficult problems occur in practical application, such as low tensile strength, small ultimate elongation, remarkable brittleness, easy to crack and other issues. In this paper, the shrinkage deformation of cement based materials are classified into four types upon the analysis of shrinkage reasons, then the inhibitory effect and its mechanism of polymers fiber for cement based material are investigated.

Elastomer-Gasoline Blends Interactions I. Effects of Methanol-Gasoline Mixtures on Elastomers

1983 ◽  
Vol 56 (1) ◽  
pp. 135-168 ◽  
Author(s):  
Ismat A. Abu-Isa
Keyword(s):  
Tensile Strength ◽  
Ultimate Tensile Strength ◽  
Solubility Parameter ◽  
Ultimate Stress ◽  
Stress Strain ◽  
Equilibrium Stress ◽  
Ultimate Elongation ◽  
Linear Relationships

Abstract 1. Properties of most fuel resistant elastomers are degraded to a larger extent by mixtures of methanol and gasoline than by the pure components. 2. The data on all elastomers except the fluorocarbon can be explained in terms of the solubility parameter concept. 3. The ultimate tensile strength and ultimate elongation of swelled elastomer networks are quantitatively related to volume swell by simple linear relationships. 4. Ultimate stress and ultimate elongation of swelled elastomer networks obey equilibrium stress-strain relationships.

Preparation and Process Research of Starch/Thatch Composite

2014 ◽  
Vol 886 ◽  
pp. 88-91
Author(s):  
Qin Fang Lu ◽  
Guo Chao Li
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Starch Content ◽  
Hot Embossing ◽  
Process Research ◽  
Raw Material ◽  
Processing Conditions ◽  
Ultimate Elongation ◽  
New Type

A new type of starch/thatch composite with degradable property, which took starch as adhesive, thatch particles as main raw material and water as plasticizer, was successfully prepared by hot-embossing method. Mechanical properties of the composite such as hardness, tensile strength and ultimate elongation were investigated, and the effects of processing conditions on the mechanical properties were discussed. The results showed that the composite had the highest tensile strength and ultimate elongation but the lowest hardness when the amount of starch adhesive was 40% (dry basis) and water was 25% (wet basis) at hot-embossing temperature of 120°C for 10 min. It was suggested in our works that the hot-embossing method could be used to fabricate starch/thatch composite with starch content ranging from 20% to 50%, and that the composite with good hot-embossing process could be obtained by properly controlling the amount of starch and water.

The Conductive of Composites Made from Polypyrrole and PBA-g-PMMA-GMA

2014 ◽  
Vol 898 ◽  
pp. 144-148
Author(s):  
Shi Biao Zhou ◽  
Xiao Bing Huang ◽  
An Guo Xiao ◽  
Zhen Gan Chen ◽  
Yuan Dao Chen ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Molar Ratio ◽  
Polymerization Time ◽  
High Tensile Strength ◽  
Ultimate Elongation ◽  
Preparation Conditions ◽  
Copolymer Composites

A novel PPy/PBA-g-PMMA-GMA (copolymer) composites were prepared and the preparation conditions, characterization and properties of the composites were investigated. The results indicate that the oxidant types, molar ratio of oxidant/monomer, polymerization time, PPy content affect greatly the conductivity of the PPy/terpolymer composites. The ultimate elongation of composites decreases with increasing PPy content,while high PPMM content brings forth high tensile strength.

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