Short Chain Branching Effect on the Cloud-Point Pressures of Ethylene Copolymers in Subcritical and Supercritical Propane
Short Chain Branching Effect on the Cloud-Point Pressures of Ethylene Copolymers in Subcritical and Supercritical Propane
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亚临界和超临界丙烷中短链支化对乙烯共聚物浊点压力的影响
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
L. Sperling
中科院分区：
文献类型：
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作者：
S. J. Han;D. Lohse;M. Radosz;L. Sperling
使用可变体积光学批处理池测量丙烷中乙烯与丙烯、丁烯、己烯和辛烯的共聚物的浊点压力，以研究在 25 至 200 °C 的温度范围和高达 700 bar 的压力下支链数量和长度对相行为的影响。随着乙烯-丙烯共聚物、乙烯-丁烯共聚物和乙烯-己烯共聚物的支化度增加，浊点压力降低。在相同的支化度下，随着支化长度的增加，浊点压力略有下降。通过调整支链段能量，发现共聚物 SAFT（统计缔合流体理论）状态方程与实验浊点数据相关。
The cloud-point pressures of copolymers of ethylene with propylene, butene, hexene, and octene in propane were measured with a variable-volume optical batch cell to investigate the effects of the number and length of branches on the phase behavior in the temperature range from 25 to 200 °C and at pressures up to 700 bar. As the degree of branching increased in the ethylene-propylene copolymers, ethylene-butene copolymers, and ethylene-hexene copolymers, the cloud-point pressures decreased. At the same degree of branching, the cloud-point pressures decreased slightly upon increasing branch length. The copolymer SAFT (statistical association fluid theory) equation of state was found to correlate the experimental cloud-point data by adjusting the branch segment energy.