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材料工程  2011 

天然橡胶基凹凸棒土纳米复合材料制备及性能研究

Keywords: 天然橡胶,凹凸棒土,纳米复合材料,硫化特性,结晶

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Abstract:

采用机械共混法制备了天然橡胶(NR)基凹凸棒土(AT)纳米复合材料,研究了复合材料的微观结构、力学性能及硫化特性,探讨了AT补强NR的机理。结果表明,改性后的AT能在NR基体中达到均匀分散并形成良好的聚合物-填料界面,显示出优异的补强效果。AT不但在胶料硫化过程中充当了交联点,而且在试样拉伸过程中沿拉伸方向取向,起了诱导结晶的作用。复合材料的拉伸结晶行为与填料量及填料粒子表面交联点数量有关。改性剂不同导致胶料交联行为存在差异,从而影响复合材料的拉伸结晶及应力-应变行为。改性及胶料混炼未破坏AT的层链结构。

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