α-olefin + n-hexane + 乙烯/1-octene 共聚物系统的高压相位行为:实验研究和建模
Ruijun Zhang1, Ziyi Dong2, Qiqi He1
1College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266555, China.
Polymers
|January 10, 2026
概括
了解聚烯-溶剂相位行为是工业聚合的关键. 乙烯,1-丁烯和1-烯充当抗溶剂,降低过渡温度,而1-烯则增加过渡温度.
科学领域:
- 聚合物科学 聚合物科学
- 化学工程是化学工程的重要组成部分.
- 物理化学 物理化学
背景情况:
- 准确的相位行为数据对于聚烯-溶剂混合物对于安全高效的工业溶液聚合是必不可少的.
- 聚乙烯-co-1-octene (POE96k-10) 是本研究的一个相关的共聚合物.
研究的目的:
- 调查聚烯-溶剂系统的二进制和三进制相位行为.
- 分析α-olefin类型和质量分数对相位过渡的影响.
- 评估修改后的桑切斯-拉康贝状态方程 (MSL EOS) 的预测能力.
主要方法:
- 利用视觉高压电池来确定相位过渡边界.
- 研究了二进制 (n-hexane + POE96k-10) 和三进制 (α-olefin + n-hexane + POE96k-10) 系统.
- 系统地改变了α-olefins (乙烯,1-丁烯,1-烯,1-烯) 和它们的质量分数.
主要成果:
- 阶段过渡温度和压力与α-olefin质量分数呈现出近乎线性关系.
- 乙烯,1-丁烯和1-烯降低了相位过渡温度;1-烯增加了它们.
- 乙烯具有显著的抗溶剂作用,降低温度和提高压力.
结论:
- α-olefins的类型和度极大地影响了多聚烯 - 溶剂相行为.
- 对于三元系统,MSL EOS 提供了良好的相关性,对于较长的α-olefin 链,准确性会降低.
- 这些发现对于优化工业溶液聚合过程至关重要.
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