Synthesis and Utilization of Low Dispersity Acrylic Macromonomer as Dispersant for Nonaqueous Dispersion Polymerization,Macromolecules

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Synthesis and Utilization of Low Dispersity Acrylic Macromonomer as Dispersant for Nonaqueous Dispersion Polymerization
Macromolecules ( IF 5.1 ) Pub Date : 2018-08-09 00:00:00 , DOI: 10.1021/acs.macromol.8b01169
Mingmin Zhang ₁ , Robin A. Hutchinson ₁

Affiliation

The effect of dispersity on the stabilization performance of poly(butyl methacrylate) (P(BMA)) ω-unsaturated macromonomer used as a reactive dispersant in nonaqueous acrylic dispersion (NAD) polymerization is investigated for the first time. Macromonomer with low dispersity (1.3) is synthesized in a one-pot process by the addition of bis(difluoroboryldiphenylglyoximato)cobalt(II) (CoPheBF) as a catalytic chain transfer (CCT) agent to P(BMA) chains mediated by atom transfer radical polymerization (ATRP); addition of the CoPheBF at a BMA monomer conversion of ∼80% leads to good control of chain length and dispersity while achieving a high fraction of terminal double bond (TDB) functionality. The lower dispersity P(BMA) macromonomer provides better stabilization to NAD systems per dispersant chain compared to material of the same number-average molecular weight (∼6000 Da) and TDB functionalization (∼70–75%) but higher dispersity (1.8), as characterized by the smaller average particle sizes and the higher weight fractions of incorporated dispersant.

中文翻译：

低分散丙烯酸大分子单体非水分散聚合分散剂的合成与利用。

首次研究了分散度对非水丙烯酸分散体（NAD）聚合中用作反应性分散剂的聚（甲基丙烯酸丁酯）（P（BMA））ω-不饱和大分子单体的稳定性能的影响。通过在原子转移自由基介导的P（BMA）链中添加作为催化链转移（CCT）试剂的双（二氟硼基二苯基乙二肟基）钴（II）（CoPheBF），通过一锅法合成低分散度的大分子单体（1.3）。聚合（ATRP）；在〜80％的BMA单体转化率下添加CoPheBF可以很好地控制链长和分散度，同时实现很高比例的末端双键（TDB）功能。

更新日期：2018-08-09

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