Facile Synthesis of Poly(phenyleneethynylene)-block-Polyisocyanide Copolymers via Two Mechanistically Distinct, Sequential Living Polymerizations Using a Single Catalyst,Macromolecules

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Facile Synthesis of Poly(phenyleneethynylene)-block-Polyisocyanide Copolymers via Two Mechanistically Distinct, Sequential Living Polymerizations Using a Single Catalyst
Macromolecules ( IF 5.1 ) Pub Date : 2015-12-16 00:00:00 , DOI: 10.1021/acs.macromol.5b02555
Ming Su ₁ , Na Liu ₁ , Qian Wang ₁ , Huiqing Wang ₁ , Jun Yin ₁ , Zong-Quan Wu ₁

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Facile synthesis of hybrid block copolymers containing two segments that cannot be synthesized under the same polymerization mechanism still remains a great challenge in the field of polymer synthesis. Here we report on one-pot synthesis of hybrid block copolymers containing conjugated poly(phenyleneethylene) (PPE) and stereoregular poly(phenyl isocyanide) (PPI) using palladium(II) complex as a single catalyst. Although the two blocks were polymerized via distinct polymerization mechanism, the block copolymerization were revealed to proceed in a living/controlled chain-growth manner, afforded PPE-b-PPI block copolymers in high yields with controlled molecular weights, narrow molecular weight distributions, and tunable compositions. By using this synthetic method, amphiphilic PPE-b-PPI block copolymers containing hydrophobic PPE and hydrophilic PPI segments were facilely prepared. Such block copolymer can self-assembly into well-defined supramolecular structure in selective solvents. In addition, the one-pot block copolymerization method can be applied to the preparation of other hybrid block copolymers such as PPE-b-poly(1-isocyanohexadecane) (PPE-b-PIH) and PPE-b-poly(quinoxaline-2,3-diyl) (PPE-b-PQD) under living/controlled chain-growth manners.

中文翻译：

使用单一催化剂通过两种机理不同的顺序活性聚合轻松合成聚（亚苯基乙炔基）-嵌段-多异氰酸酯共聚物

包含两个不能在相同聚合机理下合成的链段的杂化嵌段共聚物的简便合成在聚合物合成领域仍然是一个巨大的挑战。在这里，我们报告了使用钯（II）配合物作为单一催化剂，一锅合成包含共轭聚（苯撑乙烯）（PPE）和立构规整聚（苯基异氰酸酯）（PPI）的杂化嵌段共聚物。尽管这两种嵌段是通过独特的聚合机理进行聚合的，但发现嵌段共聚以活体/受控链增长的方式进行，以高收率提供了PPE - b- PPI嵌段共聚物，分子量可控，分子量分布窄，且可调组成。通过使用这种合成方法，两亲性PPE- b容易地制备了包含疏水性PPE和亲水性PPI链段的-PPI嵌段共聚物。这种嵌段共聚物可以在选择性溶剂中自组装成明确定义的超分子结构。此外，一锅煮嵌段共聚方法可以应用于其它混合的嵌段共聚物的制备，例如PPE- b -聚（1- isocyanohexadecane）（PPE- b -PIH）和PPE- b -聚（喹喔啉-2- ，3-二基）（PPE- b -PQD）在活/受控链增长方式下。

更新日期：2015-12-16

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