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首页> 外文学位 >In situ preparation and structure: Property studies of filler particles in poly(dimethylsiloxane) elastomers.
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In situ preparation and structure: Property studies of filler particles in poly(dimethylsiloxane) elastomers.

机译：原位制备和结构：聚（二甲基硅氧烷）弹性体中填料颗粒的性能研究。

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摘要

Poly(dimethylsiloxane) (PDMS) is a versatile silicone polymer studied very extensively for various applications. However, because of its mechanical weakness, it is filled with many different filler particles including SiO2, TiO2 and ZrO2. In the present research work, some specialty filler particles were generated by in-situ sol-gel method in PDMS networks. These composites were studied for their structure-property effects in relevance to their transparency, magnetic, electrical and mechanical properties.; Structure-property and kinetic studies were performed on TiO2 and ZrO2 filled PDMS composites. Hydrolysis and condensation process was controlled by selecting alkoxides, with longer chain length and bulky side groups (titanium-2-ethyl hexoxide and zirconium butoxide). SAXS, SEM, Instron was used for characterizing these composites.; Fe2O3 particles with different shapes and sizes were generated in-situ in PDMS networks using aqueous solutions of FeCl 3 and HCl. Non-aqueous method and ferric acetylacetonate [Fe(acac)] however yielded higher amounts of filler. Magnetic and mechanical properties were studied using vibrating sampling magnetometer (VSM) and Instron respectively. Attenuated Total Reflectance (ATR), SEM and EDS was used to determine the structure, shape and composition of the composite.; Polyaniline (PANI) was generated in-situ from monomer aniline, by chemical oxidation in PDMS networks. The effects of temperature, dopant and oxidant were also studied. The structures of the PANIs were studied using ATR. Conductivity was measured using a four-point probe. Conductivity of this composite depends on the degree of oxidation and doping of the generated PANI.; A novel approach along with a structure-property study for ZrO2 and TiO2 filled PDMS was performed. A small amount of a stannous compound mixed in alkoxide, dramatically reduced the time for particle generation. The composites were transparent, with ZrO2 filled having higher transparency than TiO2. SAXS data showed a correlation between the particles.; Surface of an injection molded microfluidic component made from cyclic olefinic copolymers (COC) was modified in order to change the surface properties applicable to bio-fluidic devices. Plasma treatments and ASG (aerosol gel) coating were used to achieve the surface modifications. Structural changes after the plasma treatments were examined by ATR spectroscopy. Contact angle measurements with water were used as a measure of hydrophobicity.
机译：聚（二甲基硅氧烷）（PDMS）是一种用途广泛的有机硅聚合物，已针对各种应用进行了广泛的研究。然而，由于它的机械弱点，它充满了许多不同的填料颗粒，包括SiO2，TiO2和ZrO2。在目前的研究工作中，通过PDMS网络中的原位溶胶-凝胶法生成了一些特殊的填料颗粒。研究了这些复合材料的结构特性与透明性，磁，电和机械性能的关系。对TiO2和ZrO2填充的PDMS复合材料进行了结构性质和动力学研究。水解和缩合过程通过选择链长较长的侧链烷氧基钛（2-乙基己氧基钛和丁氧基锆）来控制。 SAXS，SEM，Instron用于表征这些复合材料。使用FeCl 3和HCl的水溶液在PDMS网络中原位生成具有不同形状和尺寸的Fe2O3颗粒。非水法和乙酰丙酮铁[Fe（acac）]产生的填料量更高。分别使用振动采样磁力计（VSM）和Instron研究了磁性和机械性能。衰减全反射率（ATR），SEM和EDS用于确定复合材料的结构，形状和组成。聚苯胺（PANI）由单体苯胺通过PDMS网络中的化学氧化原位生成。还研究了温度，掺杂剂和氧化剂的影响。使用ATR研究了PANI的结构。使用四点探针测量电导率。该复合材料的电导率取决于生成的PANI的氧化程度和掺杂程度。对ZrO2和TiO2填充的PDMS进行了新颖的方法和结构性质研究。少量亚锡化合物混入醇盐中，可显着减少生成颗粒的时间。复合材料是透明的，填充的ZrO2的透明度比TiO2高。 SAXS数据显示出颗粒之间的相关性。对由环状烯烃共聚物（COC）制成的注塑微流体组件的表面进行了改性，以改变适用于生物流体设备的表面性能。等离子处理和ASG（气溶胶凝胶）涂层用于实现表面改性。通过ATR光谱检查等离子处理后的结构变化。与水的接触角测量值用作疏水性的量度。

著录项

  • 作者

    Murugesan, Suresh.;

  • 作者单位

    University of Cincinnati.;

  • 授予单位 University of Cincinnati.;
  • 学科 Chemistry Polymer.
  • 学位 Ph.D.
  • 年度 2003
  • 页码 182 p.
  • 总页数 182
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 高分子化学（高聚物）;
  • 关键词

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