Development of Biodiesel-Resistant Nitrile Rubber Compositions

Frontmatter

INTRODUCTION

Abstract

Substantial efforts have been made to control pollutant gas emissions to minimise global warming effects. Based on the fact that these emissions are mainly a result of fossil fuels use, researchers are constantly motivated to find replacements for these pollutant fuels.

Felipe N. Linhares

1. LITERATURE REVIEW

Abstract

Fossil fuels are still the primary global source of energy, and their use is especially prominent in the transportation sector (CREMONEZ et al., 2015a; CREMONEZ et al., 2015b; MOHR et al., 2015; ULLAH et al., 2015), which contributes significantly to atmospheric pollution (SANGEETA et al., 2014). This sector alone is responsible for 15% to 26% of global greenhouse gas (GHG) emissions (ANDERSON, 2015; HOMBACH; WALTHER, 2015).

Felipe N. Linhares

2. MATERIALS AND EQUIPMENT

Abstract

This Thesis aimed to develop a new nitrile rubber sulphur-based formulation with different accelerators and to assess its resistance to pure soybean biodiesel.

Felipe N. Linhares

3. AIMS

Abstract

• Nitrile rubber with 33% of acrylonitrile content (N615B) – Nitriflex S/A Indústria e Comércio;
• Nitrile rubber with 45% of acrylonitrile content (N206) – Nitriflex S/A Indústria e Comércio;
• Carboxylated nitrile rubber with 28% of acrylonitrile content, and 7% of carboxylic content (Nitriclean 3350X) – Nitriflex S/A Indústria e Comércio;
• Biodiesel from soybean oil – Centro de Pesquisa e Desenvolvimento Leopoldo Américo Miguez de Mello (CENPES/PETROBRAS);
• Carbon black (Spheron 6630) – Cabot Brasil Indústria e Comércio Ltda.;
• N-tert-butyl 2-benzothiazole sulfenamide (TBBS) – commercial grade;
• Stearic Acid – commercial grade;
• Sulphur – commercial grade;
• Zinc Oxide – commercial grade;

Felipe N. Linhares

4. METHODS

Abstract

Different compositions were prepared using different types of nitrile rubber samples. Three different samples were used: a nitrile rubber sample with 33% of acrylonitrile content, a nitrile rubber sample with 45% of acrylonitrile content, and a carboxylated nitrile rubber sample with 28% of acrylonitrile content. For identification purposes the compositions were labelled as shown in Table 5.

Felipe N. Linhares

5. RESULTS AND DISCUSSION

Abstract

The rheometric parameters (C^L, C^H, t^s1, and t⁹⁰) of the three compositions, which were prepared according to ASTM 3187, are presented in Table 10. Considering that the vulcanisation system employed for these compositions were the same, the differences noted should be attributed to the different elastomers structures, i.e., different acrylonitrile content or the presence of carboxyl group.

Felipe N. Linhares

Backmatter