november

ArticlesFeatured
RubberWorld 1108 Views ,

Post IEC Daily

This follow-up to the 2022 International Elastomer Conference and Expo, held last month in Knoxville, Tennessee, and published for the Rubber Division, ACS by Lippincott & Peto, Inc., includes photographs and summaries of IEC events, including the Rubber Division, ACS Service Award recipients, 2022 scholarship winners, the Experience Elastomers Student Outreach Program, nomination information for the Rubber Division, ACS 2024 Science & Technology Awards, 2022 Expo exhibitors, and details on future International Elastomer Conferences, including locations through 2029.

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ArticlesFeaturedThermoplastic Elastomers & Urethanes
RubberWorld 1195 Views ,

Are all thermoplastic polyolefins created equal?

Thermoplastic polyolefin (TPO) is one of the fastest growing commercial roofing systems on the market. Developed in Europe in the 1970s, TPO was introduced to the U.S. market in the late 1980s and has become the dominant installed roof system in the industry; now used on 53% of commercial roofs, according to the American Institute of Architects.

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ArticlesFeaturedLatex and Natural Rubber
RubberWorld 1297 Views ,

Electrically conductive elastomers based on NR and polyaniline

Natural rubber is an electrically insulating material, but introduction of conductive fillers like carbon based materials (carbon black, graphite, carbon nanofibers or nanotubes) or metal fillers can increase the conductivity of the resulting composite. These materials are frequently used for electromagnetic/radiofrequency interference (EMI/RFI) shielding, and laboratory and military uses.

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ArticlesFeatured
RubberWorld 2502 Views ,

Preparation of polypropylene and skim natural rubber/thermoplastic natural rubber blends: Determining processing conditions

Centrifuged latex production in Sri Lanka contributes over 25% of the country’s annual total rubber production. This share is an increasing trend, when the production figures for the last decade are considered. During the centrifugation process, concentrated or creamed latex with dry rubber content of 60% is separated as centrifuged latex, and 5% to 10% of rubber available in the field latex is removed as the diluted fraction. It has 3% to 5% dry rubber content and a high amount of non-rubbers. This diluted fraction is known as skim latex, and the rubber extracted from acid coagulation of skim latex is referred to as skim natural rubber (SNR).

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ArticlesFeaturedLatex and Natural Rubber
RubberWorld 3087 Views , ,

Mechanism of oxidation in natural rubber compounds at lower (ambient) temperatures

The oxidation mechanism of natural rubber was studied using several techniques. In a prior article, it was found that the crosslink distribution (sulfur types including polysulfidic, disulfidic and monosulfidic) in a belt coat (conventional cured natural rubber compound) had a different crosslink distribution, depending on the aging temperature (ref. 1). The belt coat compound extracted from an oven aged (65°C) tire was compared to the belt coat compound extracted from a normal service tire (23°C, the average annual temperature in Phoenix, AZ)

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