对于脆性较大的UPR，只有在采用加载速度较慢的断裂韧性来表征其韧性时，方能观察到这一脆韧转变现象。
For the UPR with greater brittleness, the brittle-tough transition was observed only when the toughness of the resin was characterized by fracture toughness at a slower loading rate.
利用dsc热分析法表征了添加剂对防爆硝酸铵晶型转变的影响。
The effect of various additives on crystal phase transitions of anti-explosive ammonium nitrate was presented using the DSC.
主要包括我们提出的玻璃化转变机制的串模型、发明的一种液态低频力学谱方法、以及用该方法对水的玻璃化转变的表征。
It includes the proposed string-model for the glass transition, the invented low-frequency mechanical spectra in liquids and the indicating of the glass transition in water by this method.
从聚合物的结构表征及机理探讨表明：颜色突变后，体系产生了新的活性中心，催化机理发生了转变——由配位机理转变为阳离子机理。
Structure characterization and mechanism study showed that, after the color change, new active center formed and polymerization changed from coordination to cationic mechanism.
从聚合物的结构表征及机理探讨表明：颜色突变后，体系产生了新的活性中心，催化机理发生了转变——由配位机理转变为阳离子机理。
Structure characterization and mechanism study showed that, after the color change, new active center formed and polymerization changed from coordination to cationic mechanism.
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