四川大学Jin-Rong Wu研究组揭示了通过不同方法制备的天然橡胶（NR）的结构性能差异，发现蛋白质和凝胶含量是关键因素。这一研究成果发表在2023年12月13日出版的国际学术期刊《中国高分子科学杂志》上。

为了评价各种市售天然橡胶的性能，确定关键的结构和组成成分，该研究系统地比较和分析了四种代表性NR原料：风干片 (ADS)、肋状烟熏片 (RSS)、恒粘度NR (CV) 和全场乳胶橡胶 (WF)。研究的重点是评估其静态力学性能，SIC性能，耐磨性和抗疲劳性。研究结果表明，蛋白质和凝胶含量对天然橡胶的性能有重要影响。这些成分有助于形成高交联密度区域，在橡胶中产生异质网络结构。

这种结构放大变形过程中的应变，导致更早和更强的应变诱导结晶 (SIC)。在四种的商业NR品牌中，RSS由于其高蛋白质和凝胶含量而表现出优越的整体机械和动态性能。该研究可为了解不同商用NR之间的性能差异提供有价值的参考，从而为NR的实际加工和选择提供指导。

据介绍，天然橡胶以其优越的弹性和综合力学性能，广泛应用于航空航天、军工、交通运输等领域。然而，通过不同方法制备的商用NR在机械性能上表现出不同，这主要是由于从乳胶到块状橡胶材料转化过程中加工条件的变化。因此，这给天然橡胶的科学研究和工业生产带来挑战。

附：英文原文

Title: Revealing the Structure-Property Difference of Natural Rubber Prepared by Different Methods: Protein and Gel Content are Key Factors

Author: Shao-Qi Huang, Jun-Qi Zhang, Yong Zhu, Ling-Min Kong, Lu-Sheng Liao, Fu-Quan Zhang, Zheng-Tian Xie, Jin-Rong Wu

Issue&Volume: 2023-12-13

Abstract: Natural rubber (NR) is widely used in various fields including aerospace, military industry and transportation due to its superior elasticity and comprehensive mechanical properties. Nonetheless, the commercial NR prepared by different methods usually exhibits different mechanical properties, primarily due to variations in processing conditions during the conversion from latex to bulk rubber material. Consequently, this poses challenges in scientific research and industrial production of NR. In order to assess the properties of various commercially available NR and identify key structural and compositional components, this study systematically compares and analyzes four representative NR raw materials: air dried sheet (ADS), ribbed smoked sheets (RSS), constant viscidity NR (CV), and whole field latex rubber (WF). The investigation focuses on evaluating their static mechanical behavior, SIC behavior, wear resistance, and fatigue resistance. The findings indicate that protein and gel content exhibit a crucial influence on the NR properties. These constituents contribute to the formation of a high-crosslinking density region, generating a heterogeneous network structure within the rubber. This structure amplifies strains during deformation, leading to earlier and stronger strain-induced crystallization (SIC). Among the four commercial NR brands, RSS demonstrates superior overall mechanical and dynamic properties owing to its high protein and gel content. This study serves as a valuable reference for comprehending the differences in properties among various commercial NR, thereby offering guidance for the actual processing and selection of NR.

DOI: 10.1007/s10118-024-3071-2

Source: https://www.cjps.org/en/article/doi/10.1007/s10118-024-3071-2/