Making the best of it: nitroxide-mediated polymerization of methacrylates via the copolymerization approach with functional styrenics,Polymer Chemistry

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Making the best of it: nitroxide-mediated polymerization of methacrylates via the copolymerization approach with functional styrenics
Polymer Chemistry ( IF 4.1 ) Pub Date : 2019-11-19 , DOI: 10.1039/c9py01458f
Aaron C. Schmidt _{1,

2,

3,

4,

5} , Hatice Turgut _{1,

2,

3,

4,

5} , Dao Le _{1,

2,

3,

4,

5} , Ana Beloqui _{1,

2,

3,

4,

5} , Guillaume Delaittre _{1,

2,

3,

4,

5}

Affiliation

The SG1-mediated solution polymerization of methyl methacrylate (MMA) and oligo(ethylene glycol) methacrylate (OEGMA, M_n = 300 g mol⁻¹) in the presence of a small amount of functional/reactive styrenic comonomer is investigated. Moieties such as pentafluorophenyl ester, triphenylphosphine, azide, pentafluorophenyl, halide, and pyridine are considered. A comonomer fraction as low as 5 mol% typically results in a controlled/living behavior, at least up to 50% conversion. Chain extensions with styrene for both systems were successfully performed. Variation of physical properties such as refractive index (for MMA) and phase transition temperature (for OEGMA) were evaluated by comparing to 100% pure homopolymers. The introduction of an activated ester styrene derivative in the polymerization of OEGMA allows for the synthesis of reactive and hydrophilic polymer brushes with defined thickness. Finally, using the example of pentafluorostyrene as controlling comonomer, it is demonstrated that functional PMMA-b-PS are able to maintain a phase separation ability, as evidenced by the formation of nanostructured thin films.

中文翻译：

充分利用它：通过功能性苯乙烯的共聚方法，由硝基氧介导的甲基丙烯酸酯聚合

SG1介导的甲基丙烯酸甲酯（MMA）和低聚（乙二醇）甲基丙烯酸酯（OEGMA，M _n = 300 g mol ^-1）在少量功能/反应性苯乙烯类共聚单体存在下进行了研究。考虑诸如五氟苯基酯，三苯基膦，叠氮化物，五氟苯基，卤化物和吡啶的部分。低至5mol％的共聚单体分数通常导致受控/活性，至少高达50％的转化率。两个系统均成功进行了苯乙烯扩链。通过与100％纯均聚物进行比较，评估了诸如折射率（对于MMA）和相变温度（对于OEGMA）的物理性质的变化。在OEGMA的聚合反应中引入活化的酯苯乙烯衍生物可以合成具有确定厚度的反应性和亲水性聚合物刷。最后，以五氟苯乙烯为例作为控制的共聚单体，证明了功能性的PMMA- b- PS能够保持相分离能力，这由纳米结构薄膜的形成证明。

更新日期：2019-11-19

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