LEPMI/LMOPS UMR5279 CNRS UJF INP Grenoble Université de Savoie, Le Bourget du lac, France.
Biomacromolecules. 2011 May 9;12(5):1487-93. doi: 10.1021/bm101443a. Epub 2011 Apr 14.
A phenomenological modeling approach was developed to try to understand the reinforcing mechanism of starch nanocrystals in a nonvulcanized natural rubber matrix. Natural rubber was not cross-linked to maintain the biodegradability of the biosourced materials. Nonlinear dynamic mechanical experiments highlighted the significant reinforcing effect of starch nanocrystals and the presence of the Mullins and Payne effects. Two models were used to predict the Payne effect considering that either filler-filler (Kraus model) or matrix-filler (Maier and Göritz model) interactions are preponderant. The use of the Maier and Goritz model demonstrated that phenomena of adsorption and desorption of NR chains on the filler surface governed nonlinear viscoelastic properties, even if the formation of a percolating network for filler contents >6.7 vol % was evidenced by the Kraus model.
采用现象学建模方法来试图理解淀粉纳米晶在非硫化天然橡胶基体中的增强机制。为了保持生物基材料的可生物降解性，天然橡胶未交联。非线性动态力学实验突出了淀粉纳米晶的显著增强效果以及存在的穆林斯和佩恩效应。使用两种模型来预测考虑到填料-填料（克劳修斯模型）或基质-填料（迈尔和戈尔茨模型）相互作用占主导地位的佩恩效应。使用迈尔和戈尔茨模型表明，NR 链在填料表面上的吸附和解吸现象控制着非线性粘弹性特性，即使在填料含量>6.7 体积%时形成了一个渗透网络，这一点也被克劳修斯模型所证明。
