Heterogeneity of amorphous polymers with various fragility indices as studied in terms of non-Gaussian parameter

Heterogeneity of amorphous polymers with various fragility indices as studied in terms of non-Gaussian parameter
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用非高斯参数研究具有不同脆性指数的非晶态聚合物的异质性

DOI:
10.1016/s0022-3093(98)00644-9
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发表时间:
1998
影响因子:
3.5
通讯作者:
S. Bennington
S. Bennington
中科院分区:
材料科学2区
文献类型:
--
作者:
T. Kanaya;I. Tsukushi;K. Kaji;B. Gabryś;S. Bennington

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从非高斯参数A0的角度研究了非晶聚合物的动力学非均质性。利用非相干弹性中子散射技术估计了该参数作为温度、时间和聚合物脆性的函数。我们发现非晶聚合物的非均质性随温度的降低而增加,特别是在玻璃化转变温度以下,而且强度更强(或更不脆弱)的聚合物更不均匀。
Dynamical heterogeneity of amorphous polymers has been studied in terms of non-Gaussian parameter, A0. This parameter was estimated as a function of temperature, time, and fragility of polymers using the incoherent elastic neutron scattering technique. We found that the heterogeneity of the amorphous polymers increases with decreasing temperature, especially below the glass transition temperature and also that the stronger (or less fragile) polymers are more heterogeneous.
T.Odagaki:“简单经典液体玻璃化转变的随机模型”Phys.Rev.A。
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