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分析泡沫复合板测定方法及使用价值

发布时间:2022-06-16 来源:http://www.jnhxtcg.com/

分析泡沫复合板测定方法
Analytical method for determination of foam composite board
原则上,所有对复合板相结构敏感的方法都可以确定相界,如热分析法和动态力学法;或者可以直接观察物相结构和形貌的方法,如扫描电镜、透射电镜等。下面给出使用散射光强度I确定相边界的示例。
In principle, all methods sensitive to the phase structure of composite plates can determine the phase boundary, such as thermal analysis and dynamic mechanics; Or we can directly observe the phase structure and morphology, such as scanning electron microscope, transmission electron microscope and so on. An example of determining the phase boundary using the scattered light intensity I is given below.
对于一般的多相共混体系,分散相的尺寸通常在数百纳米到数十微米的范围内。这个尺寸的下限已经与可见光的波长相当。因此,当光通过该类材料时,会发生强烈的光散射并出现浑浊,而当为单相时,不会出现散射光强度的突变。利用光散射的这一特性,可以确定相界线,并给出一个典型的结果。济南泡沫复合板的散射光强度曲线随温度突然变化的温度,通常称为“浊点”。
For general multiphase blends, the size of dispersed phase usually ranges from hundreds of nanometers to tens of microns. The lower limit of this size is already equivalent to the wavelength of visible light. Therefore, when light passes through such materials, strong light scattering and turbidity will occur, while when it is single-phase, there will be no sudden change in the intensity of scattered light. Using this characteristic of light scattering, the phase boundary can be determined and a typical result is given. The temperature at which the scattered light intensity curve of Jinan foam composite plate changes suddenly with temperature is usually called "cloud point".
相界可以通过绘制不同复合板的混合物的浊点相对于组分来获得。这种方法的测定存在三个局限性:聚合物组分的折射率应该相差较大,而且要注意折射率的温度系数,否则,如果两种组分的折射率不同当温度变化时变得相等,也会导致散射光强度急剧下降,这可能会被误认为是相变。
The phase boundary can be obtained by plotting the cloud point relative to the composition of the mixture of different composite plates. There are three limitations in the measurement of this method: the refractive index of polymer components should be quite different, and attention should be paid to the temperature coefficient of the refractive index. Otherwise, if the refractive index of two components is different and becomes equal when the temperature changes, the scattered light intensity will also decrease sharply, which may be mistaken for phase transition.
当分散相的尺寸远小于可见光的波长,如嵌段共聚物的微相分离尺寸只有几纳米到几十纳米时,该方法失效;散射光强度的突变也受动力学因素的影响。控制,如冷却或加热速度,相面积大小的变化率等,所以用这种方法测得的相界不能称为复合板的溶解度极限线。因此,复合板相界的确定通常采用相结合的方法。
When the size of the dispersed phase is much smaller than the wavelength of visible light, for example, the microphase separation size of block copolymer is only a few nanometers to tens of nanometers, the method fails; The abrupt change of scattered light intensity is also affected by dynamic factors. Control, such as cooling or heating rate, change rate of phase area, etc., so the phase boundary measured by this method can not be called the solubility limit line of composite plate. Therefore, the combination method is usually used to determine the phase boundary of composite plates.
济南泡沫复合板
泡沫复合板的使用价值分析
Application value analysis of foam composite board
当复合板的三元体系处于单相状态时,根据吉布斯相位定律,自由度可以计算为f=4-1=3,其中包括一个温度变量和两个相位分量的自变量.在相图中,具有3个自由度的单相区占据了一定的温度和成分范围。在这个范围内,温度和成分可以独立变化,它们之间没有相互制约的关系。它的横截面可以是各种形状。平面图形。
When the ternary system of the composite plate is in a single-phase state, according to Gibbs' phase law, the degree of freedom can be calculated as f=4-1=3, including one temperature variable and two independent variables of phase components In the phase diagram, the single-phase region with three degrees of freedom occupies a certain temperature and composition range. Within this range, temperature and composition can change independently, and there is no mutual restriction between them. Its cross section can be of various shapes. Plan graphics.
三元体系中济南泡沫复合板两相平衡区的自由度为2,这意味着除了温度之外,共存两相的组成还有一个自变量,即某一相的某个组成部分。是独立变量,该相中其他两种组分的含量和第二相的组成也相应确定,不能单独改变。在三元体系中,在一定温度下,两个平衡相之间存在共轭关系。无论是垂直截面还是水平截面,都以一对曲线作为其与两个单相区的分界线。
In the ternary system, the degree of freedom in the two-phase equilibrium zone of Jinan foam composite plate is 2, which means that in addition to temperature, the composition of the coexisting two phases has an independent variable, that is, a component of a certain phase. Is an independent variable. The content of the other two components in this phase and the composition of the second phase are also determined accordingly and cannot be changed independently. In the ternary system, there is a conjugate relationship between the two equilibrium phases at a certain temperature. Both vertical and horizontal sections take a pair of curves as the boundary between them and the two single-phase zones.
两相区与三相区的界面由不同温度下两个平衡相的共轭线组成。因此,在水平截面中,两相区与三相区之间用直线隔开。这条直线是复合板的温度。一条共轭线。
The interface between two-phase region and three-phase region is composed of conjugate lines of two equilibrium phases at different temperatures. Therefore, in the horizontal section, the two-phase zone and the three-phase zone are separated by a straight line. This line is the temperature of the composite plate. A conjugate line.
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