Apparatus for measuring time‐resolved light scattering profiles from supercritical polymer solutions undergoing phase separation under high pressure
Apparatus for measuring time‐resolved light scattering profiles from supercritical polymer solutions undergoing phase separation under high pressure
复制标题
用于测量高压下相分离的超临界聚合物溶液的时间分辨光散射剖面的装置
DOI：
10.1063/1.1145418
复制
发表时间：
1995
影响因子：
1.6
通讯作者：
T. Hashimoto
中科院分区：
文献类型：
--
作者：
J. Kojima;Y. Nakayama;M. Takenaka;T. Hashimoto
利用光散射仪研究了超临界聚合物溶液的相图和相分离过程的动力学。该仪器具有以下特点：（i）光散射池承受超过34.3MPa的压力和高达573 K的温度，（ii）粘性溶液如聚合物溶液可以容易地处理，（iii）可以精确地控制小至0.01MPa的快速递增或递减压力变化，和（iv）散射强度的角分布可以在宽角度范围（0°-30°）上以100次扫描/s连续测量。用该仪器测定了聚丙烯/三氯氟甲烷体系的相图。还提供了该体系相分离动力学的一些初步实验结果。
A light scattering instrument was constructed to investigate the phase diagram and the dynamics of phase separation processes for supercritical polymer solutions. The instrument has the following features: (i) the light scattering cell withstands pressure over 34.3 MPa and temperature up to 573 K, (ii) viscous solutions such as a polymer solution can be easily handled, (iii) a rapid incremental or decremental pressure change as small as 0.01 MPa can be precisely controlled, and (iv) the angular distribution of the scattered intensity can be continuously measured over a wide angular range (0°–30°) at 100 scans/s. The phase diagram of polypropylene/trichlorofluoromethane was measured with the instrument. Some preliminary experimental results for the dynamics of the phase separation of the system are also presented.