High-pressure light scattering apparatus to study pressure-induced phase separation in polymer solutions
High-pressure light scattering apparatus to study pressure-induced phase separation in polymer solutions
复制标题
高压光散射装置研究聚合物溶液中压力诱导的相分离
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
E. Kiran
中科院分区：
文献类型：
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作者：
Y. Xiong;E. Kiran
研制了一种新的高压时间和角度分辨光散射装置，用于研究近超临界条件下聚合物溶液和其他流体混合物的相分离动力学。该系统由高压聚合物加载室、溶剂充电线、可变体积散射池（内置可移动活塞连接到压力发生器，由空气驱动隔膜驱动的膨胀棒）和再循环泵组成，所有这些都安装在温度控制的烤箱中。该系统可在压力高达70 MPa，温度高达473 K的环境下工作。散射池是由两个间距为250 μm的蓝宝石平窗组成的短路径长度的散射池。它的设计允许在0°到30°的角度范围内测量透射光和散射光强度。采用256元线性图像传感器监测不同角度散射光强度的时间演变。有了这个……
A new high-pressure time- and angle-resolved light scattering apparatus has been developed to study the kinetics of phase separation in polymer solutions and other fluid mixtures under pressure at near- and supercritical conditions. The system consists of a high-pressure polymer loading chamber, a solvent charge line, a variable-volume scattering cell (with a built-in movable piston connected to a pressure generator, and an expansion rod driven by an air-actuated diaphragm), and a recirculation pump which are all housed in a temperature-controlled oven. The system is operable at pressures up to 70 MPa, and temperatures up to 473 K. The scattering cell is a short path-length cell made of two flat sapphire windows that are separated by 250 μm. It is designed to permit measurements of transmitted and scattered light intensities over an angle range from 0° to 30°. A linear image sensor with 256 elements is used to monitor the time evolution of the scattered light intensities at different angles. With this sen...