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Mechanical properties of structurally-defined magnetoactive polymer (co) networks

机译：结构定义的磁性聚合物（CO）网络的力学性能

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摘要

The mechanical properties of structurally-defined magnetoactive polymer (co)networks synthesized from well-defined poly(2-dimethylamino)ethyl methacrylate (poly(DMAEMA)) homopolymers and diblock copolymers of poly(DMAEMA) with the hydrophobic n-butyl methacrylate (BuMA) were measured in compression. Magnetic nanoparticle composition varied from 0 to 30% wt and caused a 6-fold increase in the Young's modulus of the homopolymer networks (2.91 vs. 18.62 kPa) and a 12-fold increase in the modulus of diblock copolymer networks (0.76 vs. 9.1 kPa), with homopolymers being stiffer. Mathematical modeling revealed an exponential constitutive equation to predict accurately the mechanical response of the polymers. Furthermore, experiments were performed for the poroelastic behavior of the materials and their hydraulic conductivity was found to be independent of magnetic loading and network structure. In conclusion, the incorporation of magnetic nanoparticles strengthened the (co) network structure, while the synthetic approach employed for the DMAEMA-b-BuMA formation retained the linear, non-crosslinked architecture of BuMA, resulting in less stiff structures.
机译：由定义的聚（2-二甲基氨基）甲基丙烯酸酯（聚（DMAEMA））均聚物和聚（DMAEMA）的二嵌段共聚物合成的结构定义的磁性聚合物（CO）网络与疏水性正丁基丙烯酸正丁酯（BUMA ）在压缩中测量。磁性纳米粒子组合物在0至30％wt中变化，并导致均聚物网络的杨氏模量（2.91与18.62kPa）的杨氏模量增加，二嵌段共聚物网络模量增加（0.76 vs.9.1）的12倍KPA），均聚物是更硬的。数学建模揭示了指数组成型方程，以准确地预测聚合物的机械响应。此外，对材料的孔弹性行为进行实验，并且发现它们的液压导电性与磁负荷和网络结构无关。总之，掺入磁性纳米粒子的掺入（CO）网络结构，而DMAEMA-B-BUMA地层的合成方法保留了珠光的线性，非交联架构，导致结构较少。

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  • 来源
    《RSC Advances》 |2015年第26期|共9页
  • 作者

    Mpekris Fotios; Achilleos Mariliz; Vasile Eugenia; Vasile Eugeniu; Krasia-Christoforou Theodora; Stylianopoulos Triantafyllos;

  • 作者单位

    Univ Cyprus Dept Mech &

    Mfg Engn Canc Biophys Lab CY-1678 Nicosia Cyprus;

    Univ Cyprus Dept Mech &

    Mfg Engn Polymers Lab CY-1678 Nicosia Cyprus;

    Univ Politehn Bucuresti Fac Appl Chem &

    Mat Sci Dept Oxide Mat &

    Nanomat Bucharest 011061 Romania;

    Univ Politehn Bucuresti Fac Appl Chem &

    Mat Sci Dept Oxide Mat &

    Nanomat Bucharest 011061 Romania;

    Univ Cyprus Dept Mech &

    Mfg Engn Polymers Lab CY-1678 Nicosia Cyprus;

    Univ Cyprus Dept Mech &

    Mfg Engn Canc Biophys Lab CY-1678 Nicosia Cyprus;

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  • 正文语种 eng
  • 中图分类 化学;
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