Epoxidized Natural Rubber Compounds: Effect of Vulcanization Systems and Fillers

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.

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The Effect of Chitosan Loading on the Properties of Chitosan Filled Epoxidized Natural Rubber Compounds

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.471-472.851 ◽

2011 ◽

Vol 471-472 ◽

pp. 851-856 ◽

Cited By ~ 2

Author(s):

S.M. Shaari ◽

Hanafi Ismail ◽

Nadras Othman

Keyword(s):

Natural Rubber ◽

Tensile Modulus ◽

Epoxidized Natural Rubber ◽

Rubber Matrix ◽

Curing Time ◽

Maximum Torque ◽

Elongation At Break ◽

Rubber Compounds ◽

Curing Characteristics ◽

Roll Mill

The study of chitosan loading onto epoxidized natural rubber compounds were prepared by incorporation of chitosan into epoxidised natural rubber matrix using a two-roll mill. The effects of chitosan loading on the curing characteristics, tensile properties and morphology of the compounds were investigated. Results indicated that slight changes in curing time (t90), and scorch time (tS2) of the compounds with the incorporation of chitosan. An increment is observed in the maximum torque, tensile modulus and durometer hardness of the compounds while tensile strength and elongation at break declines with chitosan loading.

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Influence of bis(triethoxysilylpropyl) tetrasulfide amount on the properties of silica-filled epoxidized natural rubber-based composites

Science and Engineering of Composite Materials ◽

10.1515/secm-2014-0156 ◽

2016 ◽

Vol 23 (4) ◽

pp. 357-362

Author(s):

Omar A. Al-Hartomy ◽

Ahmed A. Al-Ghamdi ◽

Said A. Farha Al Said ◽

Nikolay Dishovsky ◽

Mihail Mihaylov

Keyword(s):

Natural Rubber ◽

Dynamic Properties ◽

Epoxidized Natural Rubber ◽

Rubber Matrix ◽

Coupling Agents ◽

Silane Coupling Agents ◽

Rubber Composites ◽

Rubber Compounds ◽

Curing Characteristics ◽

Epoxy Groups

AbstractThe aim of the present article is to investigate the influence of the amount of bis(triethoxysilylpropyl) tetrasulfide on the curing characteristics and mechanical and dynamic properties of rubber composites based on epoxidized natural rubber (Epoxyprene 50) filled with 70 phr silica. The obtained results showed that although the interaction between the epoxy groups of epoxidized natural rubber and the silanol groups of silica through hydrogen bonds improves the dispersion of filler in the rubber matrix, the presence of silane coupling agents is necessary to obtain rubber compounds and vulcanizates with good vulcanization characteristics and mechanical and dynamic properties.

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The Potential of Rubberwood as a Filler in Epoxidized Natural Rubber Compounds

Journal of Elastomers & Plastics ◽

10.1106/b04h-ykpd-h80b-kq8n ◽

2001 ◽

Vol 33 (1) ◽

pp. 34-46 ◽

Cited By ~ 11

Author(s):

HANAFI ISMAIL

Keyword(s):

Natural Rubber ◽

Epoxidized Natural Rubber ◽

Rubber Compounds

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Optimization of Epoxidation Degree and Silane Coupling Agent Content for Silica-Filled Epoxidized Natural Rubber Tire Tread Compounds

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.844.243 ◽

2013 ◽

Vol 844 ◽

pp. 243-246 ◽

Cited By ~ 1

Author(s):

Wisut Kaewsakul ◽

Kannika Sahakaro ◽

Wilma Dierkes ◽

Jacques W.M. Noordermeer

Keyword(s):

Natural Rubber ◽

Coupling Agent ◽

Silane Coupling Agent ◽

Silica Content ◽

Epoxidized Natural Rubber ◽

Rubber Tire ◽

Rubber Compounds ◽

Silane Coupling ◽

Reinforcement Efficiency

Parallel studies on the influence of epoxide contents in epoxidized natural rubbers (ENRs) in the absence of bis-(triethoxysilylpropyl) tetrasulfide (TESPT) coupling agent, as well as a combination of ENRs with different loadings of TESPT on the properties of ENR compounds, are carried out in this work. The results suggests that the best possible combination to optimize processibility and to improve reinforcement efficiency is to utilize ENR with an epoxide content in the range of 20 30 mol%, together with 2 4 wt% relative to the silica content of TESPT. This leads to a reduction of TESPT when compared to the conventional natural rubber compounds.

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