Thermooxidative study of raw natural rubber from Brazilian IAC 300 series clones

Martins, Maria Alice; Moreno, R. M. B.; McMahan, Colleen; Brichta, Jenny L.; Gonçalves, Paulo de Souza; Mattoso, Luiz H. C.

doi:10.1016/j.tca.2008.06.001

Cited by 28 publications

(21 citation statements)

References 25 publications

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“…Kinetic analysis is an important method to investigate the thermo-oxidative stability of polymers and provide significant clues to study thermo-oxidative degradation mechanism [16]. The TG and DTG curves of Sample I and II at different heating rates are presented in Fig.…”

Section: Kinetic Analysismentioning

confidence: 99%

Effects of lanthanum complex on the thermo-oxidative aging of natural rubber

Wang

Liu

Zhao

et al. 2015

Polymer Degradation and Stability

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Section: Kinetic Analysismentioning

confidence: 99%

Effects of lanthanum complex on the thermo-oxidative aging of natural rubber

Wang

Liu

Zhao

et al. 2015

Polymer Degradation and Stability

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“…Thermogravimetric analysis provides information on thermal degradation, mass loss of the material in different stages, threshold temperature, and nature and extent of material degradation 16. Figure 3 shows the T i , T max , and T f decomposition temperatures of NR obtained from the TG curves in an inert atmosphere (for the characterization of material response at high temperature without oxygen effects).…”

Section: Resultsmentioning

confidence: 99%

Seasonal and clonal variations in technological and thermal properties of raw Hevea natural rubber

Galiani

Martins

Gonçalves

et al. 2011

J of Applied Polymer Sci

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This study was undertaken over a 10month period under environmental conditions within the state of Mato Grosso, Brazil, to evaluate the causes of variation in the technological and thermal properties of raw natural rubber (NR) from different clones of Hevea brasiliensis (GT 1, PR 255, FX 3864, and RRIM 600). These clones were chosen to represent good clones available in Brazil. The technological properties of raw NR were evaluated in terms of their dry rubber content (DRC), Wallace plasticity, plasticity retention index (PRI), and Mooney viscosity. The thermal performance was evaluated with the thermogravimetry (TG)/differential thermogravimetry (DTG) technique. There were significant variations (p < 0.01 and p < 0.05) between clones and tappings for all technological properties, except for the percentage DRC among the clones. Of the clones studied, clone PR 255 presented the highest sensitivity to thermooxidation, as measured by its PRI value. The clone type and period of the year did not significantly influence the thermal behavior (TG/DTG under a nitrogen atmosphere) among the four clones evaluated.

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“…10 shows DSC curves measured from NR, non-compatibilized blend and compatibilized blend. Many of the important technical properties of elastomers such as resilience and abrasion resilience can be correlated to T g [45]. DSC provides information concerning the glass transition, a second order event which manifests itself in a DSC curve as a step change corresponding to the change in the heat capacity of the system.…”

Section: Thermogravimetric Analysismentioning

confidence: 99%

Utilization of waste expanded polystyrene: Blends with silica-filled natural rubber

Sekharan¹,

Abraham²,

Thachil³

2012

Materials & Design

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a b s t r a c tExpanded polystyrene (EPS) constitutes a considerable part of thermoplastic waste in the environment in terms of volume. In this study, this waste material has been utilized for blending with silica-reinforced natural rubber (NR). The NR/EPS (35/5) blends were prepared by melt mixing in a Brabender Plasticorder. Since NR and EPS are incompatible and immiscible a method has been devised to improve compatibility. For this, EPS and NR were initially grafted with maleic anhydride (MA) using dicumyl peroxide (DCP) to give a graft copolymer. Grafting was confirmed by Fourier Transform Infrared Spectroscopy (FTIR) spectroscopy. This grafted blend was subsequently blended with more of NR during mill compounding. Morphological studies using Scanning Electron Microscopy (SEM) showed better dispersion of EPS in the compatibilized blend compared to the noncompatibilized blend. By this technique, the tensile strength, elongation at break, modulus, tear strength, compression set and hardness of the blend were found to be either at par with or better than that of virgin silica filled NR compound. It is also noted that the thermal properties of the blends are equivalent with that of virgin NR. The study establishes the potential of this method for utilising waste EPS.

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Thermooxidative study of raw natural rubber from Brazilian IAC 300 series clones

Cited by 28 publications

References 25 publications

Effects of lanthanum complex on the thermo-oxidative aging of natural rubber

Effects of lanthanum complex on the thermo-oxidative aging of natural rubber

Seasonal and clonal variations in technological and thermal properties of raw Hevea natural rubber

Utilization of waste expanded polystyrene: Blends with silica-filled natural rubber

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