• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >Synthesis and characterization of functional polymers with controlled architecture and their application as anticorrosion primers.
【24h】

Synthesis and characterization of functional polymers with controlled architecture and their application as anticorrosion primers.

机译：具有受控结构的功能聚合物的合成与表征及其作为防腐底漆的应用。

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

There are over 2900 ballast tanks in the U.S. Navy inventory and their annual maintenance cost amounted to 415 million dollars in 2006, half of which was directly correlated to corrosion. Ballast tanks which form the basic skeleton of a vessel, are subjected to very corrosive conditions. Epoxy based protective coatings are used by the Navy for minimizing corrosion and they currently offer five to seven years of protection. The work described in this thesis is in line with a major program instigated by the U.S. Navy to improve the reliability of tank coatings.;This thesis investigates the synthesis and use of carefully designed functional poly(methacrylate) copolymers as a primer coating addressing one of the major failure mechanisms responsible for corrosion: delamination of the coating at the steel-coating interface. Novel polymers were designed and synthesized to improve corrosion protection and adhesion of epoxy coatings to steel. They possess two types of functional groups which are incorporated in the polymer and distributed in blocks or other related structures. One block is designed to bind strongly to the metal substrate and therefore protect that surfaces from corrosion, the other block possesses the ability to interact with the bulk coating. The epoxy coating and the metal surface are therefore linked through a series of strong durable polymeric bonds.;Several monomers possessing either a metal chelating group or a group allowing blending with the coating were thus prepared. Block copolymers and other polymer structures were synthesized by nitroxide mediated polymerization, a polymerization technique that allows control of the molecular weight and architecture. An AEMA-GMA block copolymer was synthesized in a two-step process and gradient copolymers were synthesized in a one-pot synthesis.;Copolymer anti-corrosion properties were then evaluated through a series of tests (salt spray, hot water immersion, cathodic disbondment, electrochemical impedance spectroscopy, polarization curves and pull-off test). A deposition method was developed to generate the optimal coating system: the steel to protect was dipped in a dilute solution of the copolymer, rinsed with pure solvent to eliminate the excess material and painted by spraying the epoxy mixture. Electrochemical techniques showed a 60% corrosion inhibition for the AEMA-GMA copolymers. An improvement of the epoxy coating corrosion resistance with the addition of the AEMA-GMA gradient copolymer and the AEMA-GMA star-block copolymer was noticed when subjected to hot water immersion and salt spray tests.;While the polymeric primers showed to be quite effective in improving the coating's corrosion resistance, the common corrosion resistance tests were found to be inadequate to robustly characterize their full potential. Nonetheless, the functional copolymers polymer with controlled architecture, their formulation and improved testing techniques, present challenging and interesting work to continue for anticorrosion research.
机译：美国海军库存有2900多个压载舱，2006年的年度维护费用为4.15亿美元，其中一半与腐蚀直接相关。形成容器基本骨架的压载舱要经受非常腐蚀的条件。海军使用环氧树脂基保护涂层来最大程度地减少腐蚀，目前它们提供五到七年的保护。本论文中描述的工作与美国海军发起的一项旨在提高坦克涂料可靠性的主要计划相吻合。本论文研究了精心设计的功能性聚（甲基丙烯酸酯）共聚物作为底漆的合成方法和用途，解决了其中一种造成腐蚀的主要失效机理：涂层在钢-涂层界面处的分层。设计并合成了新型聚合物，以改善环氧涂层对钢的腐蚀防护和附着力。它们具有两种类型的官能团，它们结合在聚合物中并分布在嵌段或其他相关结构中。一个嵌段被设计成牢固地结合到金属基底上，因此保护该表面不受腐蚀，另一个嵌段具有与整体涂层相互作用的能力。因此，环氧涂料和金属表面通过一系列牢固的耐用聚合物键连接。制备了几种具有金属螯合基团或可与涂料共混的基团的单体。嵌段共聚物和其他聚合物结构是通过氮氧化物介导的聚合反应合成的，该聚合技术可以控制分子量和结构。分两步合成AEMA-GMA嵌段共聚物，然后通过一锅合成法合成梯度共聚物;然后通过一系列测试（盐雾，热水浸没，阴极剥离）评估共聚物的防腐性能，电化学阻抗谱，极化曲线和拉拔试验）。开发了一种沉积方法以生成最佳的涂层系统：将要保护的钢浸入共聚物的稀溶液中，用纯溶剂冲洗以消除多余的材料，然后通过喷涂环氧混合物进行喷涂。电化学技术显示出对AEMA-GMA共聚物具有60％的腐蚀抑制作用。在进行热水浸泡和盐雾测试时，发现通过添加AEMA-GMA梯度共聚物和AEMA-GMA星型嵌段共聚物可以改善环氧涂层的耐腐蚀性；尽管聚合底漆非常有效在改善涂层的耐腐蚀性方面，发现普通的耐腐蚀性测试不足以可靠地表征其全部潜力。尽管如此，具有受控结构，其配方和改进的测试技术的功能性共聚物聚合物为防腐研究提出了具有挑战性和有趣的工作。

著录项

  • 作者

    Quincy, Anne S.;

  • 作者单位

    University of New Hampshire.;

  • 授予单位 University of New Hampshire.;
  • 学科 Chemistry Polymer.;Engineering Materials Science.
  • 学位 Ph.D.
  • 年度 2009
  • 页码 243 p.
  • 总页数 243
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 高分子化学（高聚物）;工程材料学;
  • 关键词

  • 入库时间 2022-08-17 11:37:40

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号