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Silyl-Containing Polyurethanes that Selectively Disassemble with Fluoride Salts

机译：含甲硅烷基的聚氨酯，可选择性地拆卸氟化物盐

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摘要

Crosslinked networks, such as two-component polyurethanes, are used for numerous commercial applications because of their unique mechanical, thermal, and hydrocarbon resistant properties. However, the covalently bonded linkages in these materials are irreversible, which renders them difficult to degrade and destroy unless hazardous chemicals, mechanical abrasion, or thermal treatments are employed. Many of these treatments are labor-intensive, expensive, or present environmental and health concerns. To address these issues, we have developed a novel silyl-based technology that imparts degradable capabilities to crosslinked polyurethane networks, such as coatings. These silyl-containing polyurethanes are thermally stable and highly crosslinked, yet they will disassemble on demand via cascading bond cleavage when exposed to a selective, mild, and environmentally friendly fluoride salt solution. Furthermore, these polyurethanes are resistant to disassembly with strong acid and base solutions, which demonstrates their selectivity and robustness compared to other degradable crosslinked networks.
机译：交联网络，例如双组分聚氨酯，由于其独特的机械，热和碳氢化合物特性，用于许多商业应用。然而，这些材料中的共价键合键是不可逆的，其使它们难以降解并破坏使用危险化学品，机械磨损或热处理。这些治疗中的许多治疗是劳动密集型，昂贵的，或现在的环境和健康问题。为了解决这些问题，我们开发了一种新的基于Silyl的技术，赋予交联聚氨酯网络的可降解能力，例如涂料。这些含甲硅烷基的聚氨酯是热稳定的，高度交联，但在暴露于选择性，温和和环保的氟化物溶液时，它们将通过级联键切割进行随时拆卸。此外，与其他可降解交联网络相比，这些聚氨酯具有耐腐蚀性，以抗酸和基础溶液，其表现出它们的选择性和鲁棒性。

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  • 来源
    《JCT coatingstech》 |2020年第1期|共7页
  • 作者

    Iezzi Erick B.; Camerino Eugene; Daniels Grant C.; Wynne James H.;

  • 作者单位

    US Naval Res Lab Chem Div 4555 Overlook Ave SW Washington DC 20375 USA;

    US Naval Res Lab Chem Div 4555 Overlook Ave SW Washington DC 20375 USA;

    US Naval Res Lab Chem Div 4555 Overlook Ave SW Washington DC 20375 USA;

    US Naval Res Lab Chem Div 4555 Overlook Ave SW Washington DC 20375 USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 涂料工业;
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