Katakura N
Shika Rikogaku Zasshi. 1981 Jan;22(57):56-62.
Binary mixtures of waxes added carnauba wax, beeswax or dammar to paraffin were investigated by measurements of X-ray diffraction, dilatometry, differential thermal analysis and dynamic viscoelasticity. The relationships between the viscoelastic behaviour and the physical properties of these waxes were discussed. Additions of carnauba wax to paraffin changed drastically viscoelastic properties of paraffin, that is, increased the dynamic modulus, G', and decreased the loss tangent, tan delta, in the region of higher temperatures including the crystal transition temperature region of paraffin. The possible explanation for this change of viscoelastic properties is that the presence of crystals of carnauba wax composed of longer chain molecules than that of paraffin rises interfacial interaction. The temperature dependence of viscoelastic properties for binary mixtures of paraffin and beeswax was approximately the same as that of paraffin. This is because paraffin and beeswax may form a sort of homogeneous phases. Additions of dammar to paraffin increased the elasticity of paraffin in the region of lower temperatures, but did not effected to change of G' and tan delta in the region of higher temperatures. Another effect of additions of dammar was to lower the thermal expansion of binary mixtures.
通过X射线衍射、膨胀计法、差示热分析和动态粘弹性测量，研究了添加巴西棕榈蜡、蜂蜡或达玛树脂至石蜡中的蜡二元混合物。讨论了这些蜡的粘弹性行为与物理性质之间的关系。向石蜡中添加巴西棕榈蜡会极大地改变石蜡的粘弹性性质，即在包括石蜡晶体转变温度区域在内的较高温度区域，动态模量G'增加，损耗角正切tanδ减小。这种粘弹性性质变化的可能解释是，由比石蜡更长链分子组成的巴西棕榈蜡晶体的存在增强了界面相互作用。石蜡与蜂蜡二元混合物的粘弹性性质的温度依赖性与石蜡的大致相同。这是因为石蜡和蜂蜡可能形成一种均相。向石蜡中添加达玛树脂在较低温度区域增加了石蜡的弹性，但在较高温度区域对G'和tanδ的变化没有影响。添加达玛树脂的另一个作用是降低二元混合物的热膨胀。
