Influence of Calcium Carbonate Content on Properties of Natural Rubber and Acrylic Blends for Coating Applications

Nabil  Hayeemasae; Anuwat  Worlee; Abdulhakim  Masa

doi:10.6180/jase.202502_28(2).0019

Influence of Calcium Carbonate Content on Properties of Natural Rubber and Acrylic Blends for Coating Applications

Nabil Hayeemasae¹, Anuwat Worlee², and Abdulhakim Masa³This email address is being protected from spambots. You need JavaScript enabled to view it.

¹Department of Rubber Technology and Polymer Science, Faculty of Science and Technology, Prince of Songkla University, Pattani Campus, Pattani, 94000, Thailand

²Faculty of Science and Technology, Fatoni University, Pattani, 94160, Thailand

³Rubber Engineering and Technology Program, International College, Prince of Songkla University, Hat Yai, Songkhla, 90110, Thailand

Received: January 16, 2024
Accepted: March 5, 2024
Publication Date: April 29, 2024

Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.

Download Citation: ||https://doi.org/10.6180/jase.202502_28(2).0019

Natural rubber and acrylic emulsion blends with various calcium carbonate (CaCO₃) loadings were tested for their feasibility to serve as coatings on wood substrate. The morphology of the blends ranged from having fully isolated rubber particles dispersed in the acrylic matrix, to those with inter-connected particles, depending on CaCO₃ filler content. The size of CaCO₃ dispersion in the blends was nanometer sized regardless of its loading level. With increased loading of CaCO₃, tan δ peak height decreased, suggesting strong rubber-filler interactions. The incorporation of CaCO₃ enhanced tensile properties and wettability of the blends: tensile strength and peel strength were maximized at 10 parts per hundred parts of the polymer. Compared to a commercially available paint, the blends with up to 20% filler achieved a better adhesion on wood substrate by at least 17%, as well as a better corrosion resistance in an accelerated corrosion test, suggesting that these blends may be applied as paint or coating on wood.

Keywords: Natural rubber, Emulsion blend, Calcium carbonate, Coating

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