迪 ((cyclopentadienecarboxylic 酸) 甲基乙醇的动态特性
Alojz Anžlovar1, Damjan Jan Pavlica1, David Pahovnik1
1Department of Polymer Chemistry and Technology, National Institute of Chemistry, Hajdrihova 19, SI-1000 Ljubljana, Slovenia.
International journal of molecular sciences
|October 14, 2023
概括
在120-140°C时,二甲基乙 (DCPDME) 异构体1和2不可逆转地转化为稳定异构体3. 这简化了用于动态共价系统的 DCPDME 的合成和处理.
科学领域:
- 聚合物化学 聚合物化学
- 材料科学 材料科学 材料科学
- 有机化学 有机化学
背景情况:
- ((cyclopentadienecarboxylic acid) dimethyl ester (DCPDME) 是一种动态共价系统,具有作为聚合物中的交叉连接剂的潜在应用.
- 了解环丁二烯的二分化可逆性是优化基于DCPDME的聚合物的化加工条件的关键.
- DCPDME的合成产生了三种具有明显物理化学性质的区域异构体的混合物.
研究的目的:
- 为了研究DCPDME区域异构体的热行为和相互转换.
- 为了确定是否需要对纯DCPDME3同位素进行隔离.
- 为了确认DCPDME异构体3与其单构体的可逆裂变.
主要方法:
- DCPDME区域异构体的合成和分离.
- 使用H NMR,FTIR和DSC进行表征.
- 异构体混合物的热处理和通过GC-MS进行分析.
主要成果:
- 纯的DCPDME异构体1和2在气下在120-140°C下不可逆转地转化为更稳定的异构体3.
- 在135°C以5分钟的时间加热DCPDME异构体的混合物,得到几乎纯的异构体3,合成产量增加35%.
- DCPDME异构体3可逆地与单质环二烯碳酸甲基 (CPME) 结合,由GC-MS证实.
结论:
- 纯DCPDME异构体3的分离是不必要的,因为它在高温下自发地从异构体1和2中形成.
- DCPDME异构体的热转化为获得异构体3提供了一个简化的途径,提高了合成效率.
- DCPDME3同位素的可逆裂变对于其在动态共价系统和聚合物加工中的功能至关重要.
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