Viscoelastic properties of short carbon fiber thermoplastic (SBS) elastomer composites
Viscoelastic properties of short carbon fiber thermoplastic (SBS) elastomer composites
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DOI：
10.1002/app.1995.070570707
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发表时间：
1995-08
影响因子：
3
通讯作者：
L. Ibarra;A. Macías;E. Palma
中科院分区：
文献类型：
--
作者：
L. Ibarra;A. Macías;E. Palma
测定短纤维增强复合材料的粘弹性能随应变、温度和频率的变化，是检验基体-纤维界面的存在或强度的一个有用的工具。在这项工作中，这些性能进行了研究，在热塑性弹性体基体材料（SBS）填充商业碳纤维（PAN），氧化，并随后与二叠氮化物，产生SO 2 N 3基团的纤维表面上，理论上能够与聚合物链的化学反应处理。对于含有经二叠氮化物处理的氧化纤维的复合材料，已经证明发生某些现象，例如在增加应变的情况下的较小储能模量损失、较大的等效界面厚度值和比含有氧化纤维的复合材料更高的机械能损失值。玻璃化转变温度和松弛过程的表观活化能的增加，相对于含有复合材料的商业纤维，也观察到，这，总而言之，允许声明，新的基质-纤维键通过磺酰叠氮基产生，赋予更大的强度的接口，虽然它是不太硬比一个形成的氧化纤维。最后，实验结果与Huet的流变模型得到的结果一致。John Wiley & Sons，Inc.
The determination of viscoelastic property variation in short fiber-reinforced composites, as a function of strain, temperature, and frequency, constitutes a useful tool when the existence or the strength of matrix-fiber interfaces are to be examined. In this work, these properties are studied in thermoplastic elastomer matrix materials (SBS) filled with commercial carbon fiber (PAN), oxidated, and subsequently treated with diazide, which generates SO 2 N 3 groups on the fiber surface, theoretically capable of chemical reaction with the polymeric chain. For the composite containing diazide-treated oxidated fiber, certain phenomena have been proven to occur, such as lesser storing modulus losses in case of increasing strain, greater equivalent interfacial thickness values, and higher mechanical energy loss values than those of composite containing oxidated fiber. An increase in glass transition temperature and apparent activation energy of the relaxation process, with respect to composite-containing commercial fiber, are also observed, which, altogether, allow for the statement that new matrix-fiber bonds are generated through the sulfonyl azide group, conferring greater strength to the interface, although it is less stiff than the one formed with oxidated fiber. Finally, the experimental results are in agreement with those obtained from Huet's rheological model. © 1995 John Wiley & Sons, Inc.