Article
  • Influence of Sulfur/Accelerator Ratio on Tensile Properties and Structural Inhomogeneity of Natural Rubber
  • Abdulhakim Masa , Siriwat Soontaranon*, and Nabil Hayeemasae**

  • Sino-Thai International Rubber College, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
    *Synchrotron Light Research Institute, Muang District, Nakhon Ratchasima 30000, Thailand
    **Department of Rubber Technology and Polymer Science, Faculty of Science and Technology, Prince of Songkla University, Pattani Campus, Pattani 94000, Thailand

  • Sulfur/Accelerator 비율이 천연고무 인장특성 및 구조불균형에 미치는 영향 연구
Abstract

Sulfur and accelerators play very important roles in curing natural rubber, influencing the properties of rubber vulcanizates. Such properties are also associated with the microstructure of vulcanized natural rubber. In this study, the relationships between tensile properties, strain-induced crystallization behavior, and structural inhomogeneity were investigated with special attention to the ratio of sulfur to accelerator (S/Acc). Increasing the S/Acc ratio increased crosslink density, simply from having more of the crosslinking agent. The highest tensile strength was obtained at unit ratio (=1), which was associated with SIC behavior based on wide angle x-ray diffraction measurements. Reductions in both the tensile strength and crystallinity were noticed when the crosslink density was relatively high. Structural inhomogeneity of network structures induced by crosslinking was investigated by means of small angle x-ray scattering, which showed the increased size and improved homogeneity of distribution with increased S/Acc ratio.


Keywords: natural rubber, tensile properties, microstructure, strain-induced crystallization

  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2018 Impact Factor : 0.500
  • Indexed in SCIE

This Article

  • 2020; 44(4): 519-526

    Published online Jul 25, 2020

  • 10.7317/pk.2020.44.4.519
  • Received on Mar 14, 2020
  • Revised on Apr 16, 2020
  • Accepted on Apr 22, 2020

Correspondence to

  • Abdulhakim Masa
  • Sino-Thai International Rubber College, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand

  • E-mail: abdulhakim.m@psu.ac.th