Self-healing hydrophobic POSS-functionalized fluorinated copolymers via RAFT polymerization and dynamic Diels–Alder reaction,Polymer Chemistry

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Self-healing hydrophobic POSS-functionalized fluorinated copolymers via RAFT polymerization and dynamic Diels–Alder reaction
Polymer Chemistry ( IF 4.1 ) Pub Date : 2020-12-28 , DOI: 10.1039/d0py01522a
Siva Ponnupandian _{1,

2,

3,

4,

5} , Prantik Mondal _{1,

2,

3,

4} , Thomas Becker _{5,

6,

7,

8} , Richard Hoogenboom _{9,

10,

11,

12,

13} , Andrew B. Lowe _{5,

6,

7,

8} , Nikhil K. Singha _{1,

2,

3,

4}

Affiliation

This investigation reports the preparation of a tailor-made copolymer of furfuryl methacrylate (FMA) and trifluoroethyl methacrylate (TFEMA) via reversible addition–fragmentation chain transfer (RAFT) polymerization. The furfuryl groups of the copolymer were modified via the Diels–Alder (DA) reaction using different molar content of polyhedral oligomeric silsesquioxane maleimide (POSS-M), yielding hydrophobic fluorinated copolymers with varying POSS content. The chemical composition, molar mass, and extent of grafting of POSS moieties were measured by ¹H NMR spectroscopy, size exclusion chromatography (SEC), and FTIR analyses. Interestingly, compared to the parent fluoro copolymer with a water contact angle (WCA) of ≈101°, the DA modification with hydrophobic POSS molecules significantly improved the surface hydrophobicity of the modified DA polymers leading to a WCA of 135°. Moreover, as evidenced by differential scanning calorimetry (DSC), atomic force microscopy (AFM), and optical microscopy analyses, the thermoreversible behaviour of the dynamic covalent furan-POSS-M linkages facilitated the self-healing ability of these functional hybrid polymethacrylates. The developed self-healing hydrophobic POSS modified DA fluoropolymers are interesting materials that can find promising applications as specialty paints and coatings.

中文翻译：

通过RAFT聚合和动态Diels-Alder反应可自我修复的疏水性POSS-官能化氟化共聚物

这项研究报告了通过可逆的加成-断裂链转移（RAFT）聚合反应制备量身定制的甲基丙烯酸糠酯和甲基丙烯酸三氟乙酯（TFEMA）的共聚物。通过使用不同摩尔含量的多面体低聚倍半硅氧烷马来酰亚胺（POSS-M）的不同摩尔含量，通过Diels-Alder（DA）反应对共聚物的糠基进行改性，从而制得具有不同POSS含量的疏水性氟化共聚物。用¹测量POSS部分的化学组成，摩尔质量和接枝程度1 H NMR光谱，尺寸排阻色谱法（SEC）和FTIR分析。有趣的是，与水接触角（WCA）约为101°的母体氟共聚物相比，用疏水POSS分子进行的DA改性显着改善了改性DA聚合物的表面疏水性，从而使WCA达到135°。此外，正如差示扫描量热法（DSC），原子力显微镜（AFM）和光学显微镜分析所证明的那样，动态共价呋喃-POSS-M键的热可逆性促进了这些功能性杂化聚甲基丙烯酸酯的自我修复能力。研发的自修复疏水性POSS改性DA含氟聚合物是有趣的材料，可以找到有前途的应用作为特种涂料。

更新日期：2021-01-20

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