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Exploring the influence of Hevea brasiliensis clones on the extraordinary properties of natural rubber vulcanizates

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Abstract

Natural rubber latex (NRL) collected from various Hevea brasiliensis clones, namely RRIM600, RRIT251, and PB235, was used to prepare vulcanized natural rubber. The influence of protein content in various natural rubber clones on storage hardening, tensile properties, and thermal properties was investigated. It was found that the RRIM600 clone exhibited the highest protein content. The increased storage hardening is related to the higher protein content in the latex. The cure characteristic of vulcanized natural rubber depends on the proteins in NRL and acts as an activator in vulcanization system. Moreover, the RRIM600 clone exhibited the maximum of 300% modulus, 500% modulus, tensile strength, and thermal stability. This is attributed to the chemical interaction (H-bonding interaction), physical crosslink (entanglement), and also the presence of strain-induced crystallization in natural latex molecules. Thus, this study is aimed to understand the key role of non-rubber components from different clones on the networking structure. The concept utilized in this study holds great potential for a wide range of applications, leveraging the properties of natural rubber latex collected from diverse clones.

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Acknowledgments

This research was supported by the Research Fellowship, Faculty of Science, Prince of Songkla University (contract no. SCIRF65005) and Rubber Product and Innovation Development Research (SCIRU63002), Faculty of Science. We would like to thank Mr. Sompong Petrat, Rubber Authority of Thailand, for supporting the fresh natural rubber latex.

Funding

This study was funded by Research Fellowship, Faculty of Science, Prince of Songkla University, SCIRF65005.

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Authors and Affiliations

  1. Division of Physical Sciences and Technology, Faculty of Science, Prince of Songkla University, Hat-Yai, Songkhla, Thailand

    Adisak Keereerak, Nussana Lehman, Rawiporn Promsung & Ekwipoo Kalkornsurapranee

  2. Sino-Thai International Rubber College, Prince of Songkla University, Hat-Yai, Thailand

    Adisak Keereerak & Nattapon Uthaipan

  3. Sustainable Polymer & Innovative Composite Materials Research Group, Department of Chemistry, Faculty of Science, King Mongkut’s University of Technology Thonburi, Bangkok, Thailand

    Yeampon Nakaramontri

  4. Department of Physics, Rajarajeswari College of Engineering, Bangalore, India

    Jobish Johns

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  1. Adisak Keereerak
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Correspondence to Ekwipoo Kalkornsurapranee.

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Keereerak, A., Lehman, N., Uthaipan, N. et al. Exploring the influence of Hevea brasiliensis clones on the extraordinary properties of natural rubber vulcanizates. Polym. Bull. 81, 10991–11005 (2024). https://doi.org/10.1007/s00289-024-05218-9

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