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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Influence of the microstructure of PPO-based glass-formers on their dynamics as investigated by neutron spin echo
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Influence of the microstructure of PPO-based glass-formers on their dynamics as investigated by neutron spin echo

机译：中子自旋回波研究的PPO基玻璃形成剂的微观结构对其动力学的影响

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摘要

We present a neutron spin echo investigation of the high temperature dynamics of two related glass-forming systems based on poly(oxypropylene): namely the molecular liquid triol and the polyurethane gel. Measurements performed at the first maximum of the static structure factor, on a rather large time window, allow one to analyse precisely the relaxation characteristics of these systems and to compare them with previous neutron time of flight and dielectric results. We discuss the differences in relaxation times and stretching exponents obtained for both samples as a function of their microstructure: molecular nature and architecture (effects of branching or/and three-dimensional network). (C) 2002 Elsevier Science B.V. All rights reserved. [References: 20]
机译：我们提出了基于聚氧丙烯的两种相关玻璃形成系统的高温动力学的中子自旋回波研究：分子液体三醇和聚氨酯凝胶。在相当大的时间窗口内以静态结构因子的第一个最大值进行的测量，使人们可以精确地分析这些系统的弛豫特性，并将其与先前的中子飞行时间和介电结果进行比较。我们讨论了两种样品的弛豫时间和拉伸指数的差异作为其微观结构的函数：分子性质和结构（分支或/和三维网络的影响）。 （C）2002 Elsevier Science B.V.保留所有权利。 [参考：20]

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