α-阿米多三甲基酸盐:一种新的RAFT/MADIX剂类
Mathias Destarac1,2, Juliette Ruchmann-Sternchuss2, Eric Van Gramberen2
1Laboratoire Softmat, Université deToulouse, CNRS UMR 5623, Université Toulouse III-Paul Sabatier, 31062 Toulouse, France.
Molecules (Basel, Switzerland)
|May 25, 2024
概括
具有三甲基的新型酸盐剂显著改善了 styrene 的聚合. 这项研究确定了迄今为止对于受控激素聚合的最有反应性的酸盐剂.
科学领域:
- 聚合物化学 聚合物化学
- 有机合成 有机合成
- 材料科学 材料科学 材料科学
背景情况:
- 酸盐通常被认为是可逆失活激素聚合 (RAFT) 或麦克米兰可逆添加碎片链转移 (MADIX) 过程的低效剂,特别是对于 styrene 聚合.
- 激活酸盐剂对于提高它们在受控聚合技术中的有效性至关重要.
研究的目的:
- 为了研究新型α-amido三甲基酸盐作为RAFT/MADIX剂用于 styrene聚合物的有效性.
- 量化替代剂对离开组在酸盐剂中的反应性的影响.
- 为了识别用于受控激素聚合的高反应性酸盐剂.
主要方法:
- 确定链转移常数对各种酸盐剂的确定.
- 使用尺寸排除色谱 (SEC) 峰值分辨率方法来量化激活效应.
- 一个新系列α-amido三甲基酸盐的合成和表征.
主要成果:
- 证明了对α-amido三甲基酸盐的剩余组具有显著的有益的代替代效应.
- 定量确定的Z组激活,显示与O-基组相比,O-基组的激活率增加了3-4倍 (C=2.7).
- 确定了迄今为止在RAFT/MADIX聚合 styrene中报告的最具反应性的酸盐剂.
结论:
- 三甲基替代剂在激素链转移过程中有利地激活酸盐.
- 三乙烯基组在测试的替代剂中表现出最有益的效果.
- 这项研究提供了一种高度反应的酸盐剂,用于高效的RAFT/MADIX聚合 styrene.
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