Elastomers and Composites

The Rubber Society of Korea (한국고무학회)
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Mechanical Properties of Styrene-Butadiene Rubber Reinforced with Hybrids of Chitosan and Bamboo Charcoal/Silica

  • Li, Xiang Xu (School of Energy, Materials and Chemical Engineering, Korea University of Technology and Education) ;
  • Cho, Ur Ryong (School of Energy, Materials and Chemical Engineering, Korea University of Technology and Education)
  • Received : 2018.12.17
  • Accepted : 2018.12.31
  • Published : 2019.03.31
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Abstract

Chitosan-polyvinyl alcohol (PVA) -bamboo charcoal/silica (CS-PVA-BC/SI) hybrid fillers with compatibilized styrene-butadiene rubber (SBR) composites were fabricated by the interpenetrating polymer network (IPN) method. The structure and composition of the composite samples were characterized by scanning electron microscope (SEM) and Fourier transform infrared spectroscopy (FT-IR). The viscoelastic behaviors of the rubber composites and their vulcanizates were explored using a rubber processing analyzer (RPA) in the rheometer, strain sweep and temperature sweep modes. The storage and loss moduli of SBR increased significantly with the incorporation of different hybrid fillers, which was attributed to the formation of an interphase between the hybrid fillers and rubber matrix, and the effective dispersion of the hybrid fillers. The mechanical properties (hardness, tensile strength, oxygen transmission rate, and swelling rate) of the composite samples were characterized in detail. From the results of the mechanical test, it was found that BC-CS-PVA0SBR had the best mechanical properties. Therefore, the BC-CS-PVA hybrid filler provided the best reinforcement effects for the SBR latex in this research.

Keywords

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Figure 1. Formation mechanism of chitosan-PVA-filler interpenet-rating gel with formaldehyde crosslink agent.

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Figure 2. SEM graphs for (a) CS-PVA gel, (b) neat SBR, (c) SI-SBR, (d) BC-SBR, (e) SI-CS-PVA-SBR, and (f) BC-CS-PVA-SBR.

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Figure 3. FT-IR results of samples.

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Figure 4. Torque versus time traces for different samples.

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Figure 5. Tan δ of all the samples from dynamic strain sweep at a frequency of 60 cpm and at a temperature of 60°C.

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Figure 6. Dynamic temperature sweep of G' from 60 to 160°C at 1 Hz and 1 degree strain.

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Figure 7. Dynamic temperature sweep of G" from 60 to 160°C at 1 Hz and 1 degree strain.

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Figure 8. Hardness values of all the samples.

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Figure 9. The tensile strength results of all the samples.

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Figure 10. The OTR test results of all the samples.

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Figure 11. The swelling ratio test results of all the samples.

Table 1. Formulations of Test Sample Compounds.

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