Dynamic mechanical spectra and limit of linear viscoelasticity of high polmers
Dynamic mechanical spectra and limit of linear viscoelasticity of high polmers
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DOI：
10.1002/app.1962.070061909
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发表时间：
1962
影响因子：
3
通讯作者：
Bryce Maxwell;C. Guimon
中科院分区：
文献类型：
--
作者：
Bryce Maxwell;C. Guimon
研究了典型多晶聚合物（聚乙烯）和典型玻璃态非晶聚合物（聚苯乙烯）的动态力学性能随频率和温度的变化关系。这些材料对机械载荷的响应被发现取决于由高于线性粘弹性响应极限的机械载荷引起的应变的大小。因此，在高聚物的设计应用中，必须将线性粘弹性响应极限作为一个重要的材料特性来考虑。这一限制已被研究作为一个功能的时间尺度的加载和聚合物结构的一系列材料。线性粘弹性响应的应变极限随着内部结构不均匀性的增加而增加。
The dynamic mechanical properties of a typical polycrystalline polymer (polyethylene) and a typical glassy state amorphous polymer (polystyrene) have been studied as a function of both frequency and temperature. The response of these materials to mechanical loading was found to be dependent upon the magnitude of strain resulting from the mechanical load above the limit of linear viscoelastic response. Therefore, the limit of linear viscoelastic response must be considered as an important material characteristic in design application of high polymers. This limit has been studied as a function of time scale of loading and polymer structure for a series of materials. A general trend of increased strain limit of linear viscoelastic response with increased heterogeneity of internal structure has been found.