Spherical CaCO3: Synthesis, Characterization, Surface Modification and Efficacy as a Reinforcing Filler in Natural Rubber Composites

• DOI: 10.3390/polym15214287
• Publication Date: 2023-10-31T16:48:31Z
• Authors: Khansinee Longkaew; Alain Gibaud; Wasan Tessanan; Philippe Daniel; Pranee Phinyocheep
• Keywords: Filler (materials)

Natural rubber (NR), an important natural polymer derived from the Hevea brasiliensis tree, has been widely used in industry owing to its excellent elastic properties. However, it requires reinforcing fillers improve mechanical properties for manufacturing of products. Generally, calcium carbonate (CaCO3) is employed as a non-reinforcing filler. This work aimed synthesize spherical-shaped CaCO3 at submicrometric scale without and with surface treatment explore utilization filler NR composites. The morphological shape polymorphic phase were investigated using SEM, TEM, XRD, ATR-FTIR Raman techniques. various amounts (0 60 phr) CaCO3-filled composites explored. As result, NR/treated provided higher tensile strength than NR/untreated pure all loadings. may have due improved interfacial interaction between hydrophobicity after olive soap. optimal loading was 20 phr highest In addition, elongation break slightly decreased. Evidence SEM FTIR revealed vaterite polymorph stability particles matrix. results demonstrate that particle size essential effects on property enhancement Synthesized spherical could be potential broader application