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Comparison of Long-Term Stability of Initiating Monolayers in Surface-Initiated Controlled Radical Polymerizations.
Macromolecular Rapid Communications ( IF 4.6 ) Pub Date : 2020-08-06 , DOI: 10.1002/marc.202000337
Mingxiao Li 1 , Michele Fromel 1 , Dhanesh Ranaweera 1 , Christian W Pester 1, 2
Affiliation  

The reproducibility of polymer brush synthesis via surface‐initiated controlled radical polymerization is interrogated. Experiments compare the stability of initiating monolayers for surface‐initiated (SI) reversible addition‐fragmentation chain transfer polymerization (SI‐RAFT) and SI atom transfer radical polymerization (SI‐ATRP). Initiator‐functionalized substrates are stored under various conditions and grafting densities of the resulting polymer brush films are determined via in situ ellipsometry. Decomposition of one of the examined SI‐RAFT initiators results in limited reproducibility for polymer brush surface modification. In contrast, initiators for SI‐ATRP show excellent stability and reproducibility. While both techniques bring inherent benefits and limitations, the described findings will help scientists choose the most efficient technique for their goals in chemical and topographical surface modification.

中文翻译:

表面引发的受控自由基聚合中引发单层的长期稳定性比较。

通过表面引发的受控自由基聚合反应,研究了聚合物刷合成的重现性。实验比较了表面引发(SI)可逆加成-断裂链转移聚合(SI-RAFT)和SI原子转移自由基聚合(SI-ATRP)的引发单层的稳定性。引发剂官能化的底物在各种条件下存储,所得聚合物刷膜的接枝密度通过原位椭偏法测定。对其中一种SI-RAFT引发剂进行分解会导致聚合物刷表面改性的重现性受到限制。相反,SI‐ATRP的引发剂显示出出色的稳定性和可重复性。虽然两种技术都有其固有的优点和局限性,
更新日期:2020-09-08
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