烯溶解物和结晶的关系 聚烯的化分离
Mengxue Shi1, Mei Hong1, Lin Liu1
1Coal-Based Chemical Technology Research Center, National Institute of Clean-and-Low-Carbon Energy, Chuanghua Road, Future Science Park, Changping District, Beijing 102211, China.
ACS omega
|November 18, 2024
概括
在聚烯 (PP) 中的溶性 (XS) 可以使用结晶化分化 (CEF) 准确确定. 这种快速,自动化的方法与传统技术相对应,为聚烯分析提供了更高的精度和生产率.
科学领域:
- 聚合物科学 聚合物科学
- 材料科学 材料科学 材料科学
- 分析化学 分析化学
背景情况:
- 溶性 (XS) 含量对于聚烯 (PP) 的性能至关重要.
- 传统的XS测定 (ASTM D 5492-17) 是耗时且过程密集的.
- 结晶化分离 (CEF) 为聚烯分析提供了一个快速的,自动化的替代方案.
研究的目的:
- 调查通过CEF获得的XS和可溶性分数 (SF) 之间的关系.
- 验证CEF作为一种精确和准确的方法,用于在各种PP材料中确定XS.
- 将CEF的效率与传统的ASTM D 5492-17方法进行比较.
主要方法:
- 分析了大约300个不同的聚烯样品 (同聚合物和共聚合物).
- 使用CRYSTEX QC校准确定XS值.
- 使用结晶化分化 (CEF) 量化可溶性分数 (SF).
主要成果:
- 在XS和CEF衍生SF之间建立了强烈的线性关系 (R2 = 0.9942).
- 这种线性适用于各种聚合物类型,无论分子量,战术性或组成的差异如何.
- 与ASTM D 5492-17相比,CEF显著减少了分析时间,提高了精度和生产率.
结论:
- CEF提供了一种高精度和高效的方法来确定聚烯材料中的XS.
- CEF技术消除了传统方法的漫长程序,在速度和精度方面提供了显著的改进.
- 催化剂系统影响共聚合物的SF和晶体分量,突出显示了该方法对聚合物结构的敏感性.
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